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0049-2702-XXX Alliance Series Modems – USER MANUAL

08/05/2010

Rev. A

Page 138 of 197

LSN 00;

301 555 1234

LSN 01;

301 123 4567

LSN 02;

301 555 5555

(and so on through phone cell 49)

If a phone cell is specified after

RLN

, e.g.,

RLN 5

, the DTE display will show only the number

stored in the specified phone cell.

How to Disconnect a Call

To disconnect a call locally, use your communication software to force DTR to go low, or select
HANGUP form the ALX front panel AUTO-DIAL screen.

Table 5-1. V.25bis Autodialer Commands

Command

Functions

CIC

Connect next incoming call.

CRN

Call request – dial number (

) entered on DTE keyboard.

CRS

Call request – dial number stored in specified phone cell (

DIC

Disregard incoming calls.

PRN

c; n

Program normal – store number or dial string

in phone cell (

RHA

Switch to Hayes dialing mode.

RLN

Request list of all stored numbers.

RLN

Request to see number stored in phone cell (

represents a number to be dialed or stored (e.g., 5557979);

represents the number of a phone cell (0-49) where a telephone number is stored.

A comma (

) can be included in a dial string to effect a pause.

A colon (

) can be included to instruct the autodialer to wait for a dial tone before

proceeding.

Содержание Alliance V.32

Страница 1: ...e Series Modems USER MANUAL 08 05 2010 Rev A Alliance Series Modems Instruction Manual Alliance V 34M Alliance V 34 Alliance V 32 19 2M Alliance V 32 19 2 Alliance V 32 14 4M Alliance V 32 14 4 Alliance V 32M Alliance V 32 ...

Страница 2: ...0049 2702 XXX Alliance Series Modems USER MANUAL 08 05 2010 Rev A Page i Raymar Information Technology Inc 7325 Roseville Road Sacramento CA 95842 800 695 1951 Fax 916 783 1952 ...

Страница 3: ...operly in all environments and applications and makes no warranty and representation either implied or expressed with respect to the quality performance merchantability or fitness for a particular purpose Information in this User s Guide is subject to change without notice and does not represent a commitment on the part of Raymar Telenetics Raymar Telenetics assumes no responsibility for any inacc...

Страница 4: ...ULATION MODE Page 108 5 V 25bis AUTODIALER Page 135 6 DIAGNOSTICS Page 141 7 APPENDIX A TECHNICAL DATA Page 157 8 APPENDIX B QUICK SETUP CONFIGURATION Page 162 9 APPENDIX C QUICK CHANGE CONFIGURATION SCREENS Page 173 10 APPENDIX D CONNECTORS ADAPTERS and JUMPERS Page 184 11 APPENDIX E LOW PROFILE RACK MOUNT MODEM Page 190 12 APPENDIX F REGULATORY NOTICES Page 193 13 LIMITED WARRANTY Page 196 14 RM...

Страница 5: ...indicates that the modem is network manageable it can be managed using Raymar Telenetics network management software Other differences are explained later in this manual For simplicity all models are referred to in this manual as the ALX modem or the ALX However if a specific feature option etc applies only to a specific model or models this is clearly stated Otherwise all instructions and other i...

Страница 6: ...al equipment usually a computer use a TIA EIA RS 232 interface cable not supplied Connections Figure 1 1 shows how the modem is connected to the computer or terminal power phone lines and handset optional Do not install the modem more than 50 feet from the DTE DTE speeds greater than 19 2 Kbps require a much shorter low capacitance DTE interface cable For all applications Use a TIA EIA RS 232 inte...

Страница 7: ...ion requires an 8 pin connector use the alternate leased line connector shown in Figure 1 1 instead of the 6 pin LEASED LINE connector To use the alternate connector you will need to provide your own cable See Appendix A for pin out information The same cable is used whether the leased line is a 4 wire or 2 wire line In a 4 wire application the green and red wires are the TRANSMIT pair and the yel...

Страница 8: ... section explains how to use the liquid crystal display LCD and pushbuttons on the modem s front panel Figure 1 2 You will need to use the LCD and pushbuttons to select a Quick Setup configuration as explained in the next section Figure 1 2 Pushbuttons and LCD on the modem s front panel How to Use the Pushbuttons By using the front panel pushbuttons you can make selections as indicated on the LCD ...

Страница 9: ...only one screen Additional menu screens where present show additional option selections Numbered Pushbuttons Pushbuttons 1 2 and 3 correspond to segments 1 2 and 3 of the LCD screen These segments left middle and right positions of the LCD screen are numbered on the modem s front panel To make a selection from a menu screen push the button with the same number as the selection you want With respec...

Страница 10: ...the bottom line of the LCD display with option settings shown on the top line usually to the right On most DEC INC screens you can cycle through the available option settings by pressing pushbutton 1 DEC or pushbutton 3 INC DEC decreases numerical values INC increases them When you see the setting you want press pushbutton 2 to select it The setting will flash indicating that it is selected A few ...

Страница 11: ...rity handshake S appears in same position as D S and D may flash alternately TR Data Terminal Ready MR Data Set Ready RS Request to Send CS Clear to Send TD Transmit Data 28 8 19 2 14 4 9600 4800 etc Transmitter TX data rate or link rate in Kbps thousand bits per second or bps bits per second Speed of data transmission on the line TM Test mode ER Error poor signal quality CD Carrier Detect RD Rece...

Страница 12: ...elect a Quick Setup To select activate a Quick Setup configuration follow the steps below While doing so it may be helpful to refer to the LCD flow chart in the back of this manual 1 Press the ENT enter pushbutton on the modem s front panel Screen 1 of the MAIN MENU will be displayed You may have to press the ENT button two or more times to see screen 1 of the MAIN MENU This will depend on which s...

Страница 13: ...twice As you do this you will see SETUP screen 1 then after you press the ENT button a second time the modem will reset It is at this point that the selected Quick Setup actually takes effect The modem is now set up for the Quick Setup configuration you have selected All options will be set as shown in Appendix B If you want to customize the Quick Setup configuration by changing individual options...

Страница 14: ...HARACTER ORIENTED Same as Quick Setup 2 except for data protocol Use Quick Setup 3 if the DTE is synchronous character oriented bisynchronous 2 WIRE DIAL V 25bis MODE SYNCHRONOUS BIT ORIENTED Same as Quick Setup 2 except for data protocol Use Quick Setup 4 if the DTE is synchronous bit oriented SDLC HDLC 2 WIRE DIAL DUMB MODE When the ALX is in Dumb mode you can use the modem for dial answer only ...

Страница 15: ...igures the ALX for V 33 operation 2 WIRE DIAL BELL 208 OPERATION This Quick Setup configures the ALX for 2 wire dial operation compatible with Bell standard 208B 2 WIRE DIAL V 3x 208 AUTO DETECT MODE This Quick Setup configures the ALX to automatically select V 34 V 32bis V 13 or Bell 208 operation depending on the mode of the originating modem 4 WIRE LEASED LINE V 29 MODE This Quick Setup configu...

Страница 16: ...32 V 32M V 32 14 4 V 32 14 4M V 32 19 2 V 32 19 2M V 34 V 34M Hayes 01 V 25bis 02 04 Dumb 05 Leased 06 09 Y Y V 33 10 N Y Bell 208 11 12 N Y V 29 13 15 N Opt V 27 16 N Opt Y Yes supported N No not supported Opt Optional available only on certain versions of the listed model V 26 Models with V 29 V 27 option also support V 26 operation However there is no V 26 Quick Setup ...

Страница 17: ...The ALX will ignore them A carriage return CR or period is required at the end of each command line On most keyboards the carriage return CR key is labeled Enter or Return In response to the command line shown above the ALX will dial the number 555 1212 To dial an access code such as 9 to dial out of your building insert the access code and a comma in the dial string AT D 9 5551212 CR The comma ca...

Страница 18: ...nd then waits for an answer tone from a distant modem If no carrier is detected within a given time 45 seconds by default the modem automatically releases the line and sends a CFI NT result code When a call is successfully connected the TIA EIA status screen on the ALX will typically look like this Synchronous V 25bis Operation For synchronous V 25bis operation set the data format of the DTE to 7 ...

Страница 19: ...eration leased line operation is restricted to data rates of 4800 bps or higher Lines can be conditioned or unconditioned Leased line modes default to synchronous data type but may be changed to asynchronous If the data type is asynchronous error correction may be used After you select the appropriate Leased Line Quick Setup the answer and originate modems will handshake and then connect When the ...

Страница 20: ... of Bell 208 Operation Two Bell 208 Quick Setups are available as shown in Table 1 1 One configures the ALX for Bell 208 operation exclusively the other configures the ALX for V 3x 208 auto detect mode Bell 208 Operation Exclusive Quick Setup 11 configures the ALX for 2 wire dial synchronous operation compatible with Bell standard 208B The data rate is fixed at 4800 bps and the data type is set to...

Страница 21: ...re leased line V 29 operation The modem must be configured for use with a 4 wire line If you have selected the 4 Wire Leased Line V 29 Quick Setup the line type will be set automatically to the correct setting Operation is restricted to data rates of 4800 7200 and 9600 bps Lines can be conditioned or unconditioned After you select the 4 Wire Leased Line V 29 Quick Setup the ALX will send a trainin...

Страница 22: ...up on both the local and remote modem 2 One modem must be set to originate mode and the other to answer mode To make this selection use the ANS ORG DEFAULT screen on the front panel LCD 3 Configure the modems for leased line auto recovery as explained in Chapter 3 V 29 Fast Master and Slave Modes Quick Setups 14 15 Modems used in a V 29 Fast Master and Slave multidrop configuration must be Allianc...

Страница 23: ... remote modems come on line they automatically synchronize to the incoming carrier and train on the data stream from the master modem Slave to master transmission is always switched carrier operation under control of the RTS signal from the DTE An anti streaming timer built into the ALX modem will if enabled halt transmission if the DTE holds RTS on for more than 30 seconds The assumption is that ...

Страница 24: ...be ON received from DTE or DTR from EIA option set to TRUE if you want to use the modem s autodial or auto answer features If DTR is ON the TR indicator will be present on the TIA EIA status screen All Asynchronous Modes The modem s default DTE speed is 38 4 Kbps in asynchronous mode If the local DTE does not support this speed change the modem s DTE Speed option setting In Hayes mode the default ...

Страница 25: ...or experienced users Summary Setup is explained in Appendix C SELECTING OPTIONS FROM THE FRONT PANEL This section explains how to select change option settings using the front panel LCD It applies to all option screens on the LCD except the Quick Change configuration screens which are explained in Appendix C If you are not familiar with the front panel LCD and pushbuttons see Front Panel LCD and C...

Страница 26: ... configuration with undesirable results To prevent this press the ENT pushbutton to exit the SETUP menu prior to issuing any AT or V 25bis commands Example of How to Select an Option The example that follows illustrates how options are selected As you follow the steps below refer to the LCD flow chart in the back of this manual When you are done you can easily restore default settings for the type...

Страница 27: ...ted although the new selection will not become active until you exit the SETUP menu To return to the first screen of the MAIN MENU press the ENT button several times How to Return to the TIA EIA Status Screen If you want to return to the TIA EIA status screen press the ENT pushbutton several times exactly how many times will depend on which screen you are exiting from If the modem is in a test mod...

Страница 28: ...e options available from the ALX front panel The options are presented in the order in which they appear in the LCD chart in the back of this manual For each option all possible choices available selections are explained The line of text immediately below each option heading indicates the applicability of the option A mode i e Quick Setup mode is listed only if the option is effective in that mode...

Страница 29: ...e that the total modem configuration is suitable for the selected operating mode The Communication Standard option is not present on the ALX V 32 and V 32M These two models use V 32bis modulation or automatically fall back to other modes as necessary On these two models you cannot select a communication standard but you can limit operation to a desired speed range by means of the Speed Limit optio...

Страница 30: ...able for 4 wire leased line synchronous operation only The available data rates are 14 4 and 12 0 Kbps Either of these rates may be set as the maximum or minimum by using the Speed Limit MAX DCE RATE and MIN DCE RATE screens Both connected modems must be set for V 33 leased line operation Bell208 This selection provides Bell 208A compatibility for 2 wire or 4 wire leased line operation and Bell 20...

Страница 31: ... option to select 9600 7200 or 4800 bps only as the minimum and or maximum data rate DCE RATE In V 29 mode the ALX does not support automatic rate adjustment fallback or error correction Effect on Speed Limit Option When you select a communication standard the Speed Limit option is automatically adjusted to the minimum and maximum data rates shown in Table 2 1 This ensures that the Speed Limit set...

Страница 32: ...nection ENABLE If channel probing is enabled the modem will use periodic signals to examine the characteristics of the channel before making a connection and adjust its symbol rate carrier frequency and pre emphasis filter settings accordingly The modem can also adjust its transmit level if necessary if the Transmit Level Adjustable by Probing option is enabled DISABLE If channel probing is disabl...

Страница 33: ...es V 25bis dumb leased line modes V 34 operation only Three symbol rate options are available through the OPTIONAL SYMBOL screen These options allow you to specify whether or not optional symbol rates 3429 2800 and 2743 sym s will be supported when the ALX makes V 34 connections First select 3429 2800 or 2743 from the OPTIONAL SYMBOL screen and then select ENABLE or DISABLE for the selected rate Y...

Страница 34: ...sates for amplitude distortion The pre emphasis filter option determines which type of pre emphasis filter will be used by the remote modem transmitter during V 34 operation 0 through 10 These selections effective only if channel probing is disabled specify that the selected filter index 0 through 10 will be used NEGOTIABLE NEG The ALX will determine which pre emphasis filter to use based on chann...

Страница 35: ... always on OFF Shaping is forced off always off Nonlinear Encoding NONLIN ENCOD Hayes V 25bis dumb leased line modes V 34 operation only Nonlinear encoding is a method for reducing signal distortion NEGOTIABLE NEG The ALX determines whether nonlinear encoding will be used or not NO Nonlinear encoding is forced on always on OFF Nonlinear encoding is forced off always off Phase 4 Training Constellat...

Страница 36: ...selecting SPEED from SETUP screen 1 allows you to set a minimum and maximum data rate For V 34 operation ALX V 34 and ALX V 34M only you can also use this option to set a minimum and maximum symbol rate For V 34 operation you can also set independent data and symbol rate limits for the modem s transmitter and receiver The ALX will automatically operate at the highest possible data rate within the ...

Страница 37: ...peed Limit screens Use pushbutton 1 on the front panel to decrease DEC a displayed value use pushbutton 3 to increase INC a value Then use pushbutton 2 to select the displayed value Speed Limit Screens On the ALX V 32 V 32M V 32 14 4 V 32 14 4M V 32 19 2 and V 32 19 2M the Speed Limit option screens are The ALX V 34 and ALX V 34M have eight Speed Limit screens providing independent control over da...

Страница 38: ...ent TX DCE and RX DCE rates are effective only if the Asymmetric Data Rates option is enabled If this option is disabled TX and RX rates are both determined by the TX DCE limits The RX DCE setting s is ignored ALX V 32 19 2 and V 32 19 2M only To connect at 19 2 or 16 8 Kbps the modem at the other end of the link must be a V 32terbo modem or a Raymar Telenetics 19 2 Kbps modem manufactured prior t...

Страница 39: ...on through an automatic repeat transmission request algorithm Both types of error correction enable the ALX to detect data transmission errors and automatically request retransmission of adversely affected data until it is received correctly Either error correction standard V 42 or MNP may be enabled for either dial or leased line operation except V 33 V 29 V 27 and V 26 modes However error correc...

Страница 40: ...eased line modes except V 33 and V 29 The V 42 Mode settings described below apply to the type of error correction selected via the V42 SELECTION screen For example if LAPM ONLY has been selected as the error correction protocol and MANDATORY is selected from the V42 MODE screen V 42 or V 42bis error correction will be activated or if it cannot be the ALX will hang up OFF Error correction is disab...

Страница 41: ... the channel NON DESTRUCTIVE EXPEDITED NDT EXP The break packet or signal is passed through immediately but data in the buffer is not deleted NON DESTRUCTIVE NON EXPEDITED NDT NEXP The break packet or signal is passed through the channel in sequence and any data is buffered this preserves the sequence of data and breaks received V 42 Selection Options The following three options are available thro...

Страница 42: ...ay select a dictionary size of 2K 4K 8K or 16K Buffer Mode Speed Conversion Hayes V 25bis dumb leased line modes except V 33 and V 29 This option enables or disables speed conversion for asynchronous operation only between the DTE and modem when error correction is not used ENABLE Buffers about one screen full of data between the DTE and the modem providing transmission speed conversion DISABLE Da...

Страница 43: ...ontrol can be set independently for the terminal to the modem DTE DCE and for the modem to the terminal DCE DTE The flow control options include DTE DCE DCE DTE and Pass through Flow Control Two additional flow control options are described later in this chapter Note the following Flow control only applies to asynchronous connections with V 42 error correction or Buffer Mode enabled When flow cont...

Страница 44: ...the communication channel RTS RTS on off The Request to Send signal controls data flow from the modem to the DTE RTS flow control is also called hardware physical or out band flow control This selection enables flow control for the local modem only DC1 DC2 Inserts control characters R and Q into the data stream to stop R and start restart Q the flow of data from a device Also called software logic...

Страница 45: ...control characters are passed to the remote end of the communication connection after the modem acts upon them DISABLE Flow control characters are not passed ADDRESS ASSIGNMENT OPTION Address All modes The address screen allows you to set the address of the modem at your location An address may be useful if the ALX will be used in a rack or in a network The available address numbers are 000 000 th...

Страница 46: ...is operation select a V 25bis data protocol V25 Async V25 Syn_c or V25 Syn_b that is appropriate for the DTE the ALX is connected to A V 25bis Quick Setup is recommended For detailed V 25bis information see Chapter 5 V25 Syn_c Enables V 25bis synchronous character oriented operation V25 Syn_b Enables V 25bis synchronous bit oriented operation HDLC OFF Disables the autodialer meaning the modem will...

Страница 47: ... 32 14 4 and V 32 14 4M 14 4 and 12 0 Kbps 9600 7200 4800 2400 1200 and 600 bps ALX V 32 19 2 and V 32 19 2M 19 2 16 8 14 4 and 12 0 Kbps 9600 7200 4800 2400 1200 and 600 bps ALX V 34 and V 34M 28 8 26 4 24 0 21 6 19 2 16 8 14 4 and 12 0 Kpbs 9600 7200 4800 2400 1200 and 600 bps Note Error correction options and the Buffer Mode Speed Conversion option are not effective when the Data Type is set to...

Страница 48: ...ion code During data transfer the receiving modem converts parity to the parity of the remote DTE DISCONNECT OPTIONS When the modem is operating in V 25bis or dumb mode it is necessary to disconnect the modem from the telephone circuit once communication is completed The most common form of disconnection is by dropping the Data Terminal Ready DTR signal from the DTE However some applications may r...

Страница 49: ...etermined by the value of S register S10 A value of 255 in register S10 disables Carrier Disconnect and Line Current Disconnect Line Current Disconnect V 25bis dumb modes If Line Current Disconnect is enabled a loss of line current will cause the ALX to disconnect from the telephone line A value of 255 in register S10 disables Line Current Disconnect and Carrier Disconnect RTS Disconnect Hayes V 2...

Страница 50: ...ALX will ignore test initiation signals from a remote modem Note that there are two REMOTE TEST screens One is for the option just described the other is used for selecting remote digital loopback tests The Remote Test option screen for preventing or allowing remote testing looks like this EIA OPTIONS The seven options described below allow control over specific TIA EIA interface signals CTS to EI...

Страница 51: ...up and then make a selection from the CTS to EIA screen the selection from the CTS to EIA screen will cancel the Summary Setup CTS ON selection CD to EIA Hayes V 25bis dumb leased line modes except V 33 and V 29 NORMAL Carrier Detect CD is on while the modem is on line TRUE CD follows DTR supplied from the DTE TOGGLE CD turns on whenever DTR is present and then toggles off for 500 ms upon DTR disc...

Страница 52: ...voltage results in normal operation Disabling this option keeps the modem from responding to pin 21 Test Mode TM to EIA All modes This option controls pin 25 the test mode TM indicator on the RS 232 interface connector Alternately pin 25 may be used for analog loopback control For details see Appendix D NORMAL TM output is high active only during test modes TRUE TM output is always high MODEM SETU...

Страница 53: ...For leased lines the transmit level can be set between 0 and 15 dBm in 1 dBm steps The standard setting is 0 dBm Dialup Applications The transmit level for dial lines can be set as either programmable PROG or permissive PERMIS The most common settings is permissive which means the transmit level is fixed at 9 dBm maximum Note V 34 models only If the Channel Probing and Transmit Level Adjustable by...

Страница 54: ...d at speeds of 7200 bps and above but at 9600 bps or higher may be negotiated off by a modem that is not equipped with a trellis coder The trellis code option allows the user to enable or disable the trellis coder Transmitter Clocking All modes synchronous operation only This option selects one of three possible sources for the transmitter timing signal INTERNAL The timing of the modem and data te...

Страница 55: ...the receiver requires it ENABLE The modem can request a retrain sequence DISABLE The modem cannot request a retrain sequence Answer Originate Default All leased line modes except V 33 also manual originate answer dial operation This option sets the ALX to default to either answer or originate status when it makes a connection in V 34 V 32terbo 19 2 proprietary V 32bis V 32 or V 22bis mode ANSWER S...

Страница 56: ...that do not affect the modem configuration such as AUTO DIAL and test modes will function SPEAKER Two speaker options are available Speaker Control and Speaker Volume Speaker Control All modes OFF The speaker is off the call cannot be audibly monitored TIL CD on until CD The speaker remains on until a carrier signal CD is detected ON Speaker is on during the full modem handshake process and while ...

Страница 57: ... 13 signals from the remote modem TX AND RX Status of RTS will be sent to remote modem and CD is controlled by V 13 signals from the remote modem To select one of the four V 13 options press pushbutton 1 or 3 with the V13 screen displayed until the selection you want is displayed For half duplex point to point applications select TX AND RX For multidrop type applications select RX ONLY for all hos...

Страница 58: ...ORT The training length will be short as specified by ITU T Recommendation V 27bis TER This setting selects V 27ter training The first train is long to establish the connection and subsequent ones are short Carrier Type V 33 208 V 3x 208 V 29 modes but not V 29 Fast Master Fast Slave modes SWITCHED SWITCH Switched carrier operation Required for 2 wire applications For V 33 switched carrier operati...

Страница 59: ...ION The only available delay choices for 208A B operation are 50 and 150 ms If 0 or 15 ms is selected the actual delay in 208A B mode will be 50 ms V 29 V 27 and V 26 MODES For RTS CTS delay times for V 29 V 27 and V 26 modes see page 160 Note that in V 29 mode the RTS to CTS Delay option is only effective if the Carrier Type option is set to constant carrier If the Carrier Type option is set to s...

Страница 60: ...e changed through the Summary Setup screen For most applications it is not necessary to change these options they are intended primarily for specialized applications For an explanation of how to change these options available option settings and the default setting for each option see Appendix C Dial Line Options The numbers used to select different settings for each option on the Summary Setup LC...

Страница 61: ...for CD and DSR Delay enabled and the other is not the delay will be applied only for the modem configured for the delay If the V 13 Operation option is set for RX only the modem will ignore the CD and DSR Delay option CD will be controlled by V 13 signals from the remote modem V 42 Error Correction Options Selective Retransmission Hayes V 25bis dumb leased line modes except V 33 and V 29 This opti...

Страница 62: ...nd hold data in its buffer until it receives a DC1 resume transmission control character If Link Flow Control is enabled with DTE DCE flow control set to RTS and DCE DTE flow control set to CTS on both the originating and answering modems and both modems establish a buffer mode connection the modems will exchange flow control signals across the link in the form of DC1 and DC3 characters If the dat...

Страница 63: ...Hayes mode X command If desired the Alternate V 42 MNP CONNECT Codes option may be used to display additional information with the CONNECT result code as follows Alternate CONNECT Code Meaning CONNECT nnnn REL Reliable MNP connection any MNP class CONNECT nnnn LAP M ACTIVE V 42 V 42bis connection CONNECT nnnn Normal or buffer mode connection nnnn is in the connection speed e g 9600 bps or 28 8 Kbp...

Страница 64: ...in Chapter 3 the modems use an auxiliary channel If desired this channel may be disabled Phase Reversals in Answer Tone All modes When enabled the Phase Reversals in Answer Tone option signals the telephone network to turn off its echo cancellers For virtually all applications phase reversals should be enabled the default settings Satellite Delay 208 V 3x 208 modes This option facilitates transmis...

Страница 65: ...Phase Detection 208 V 3x 208 modes NORMAL Conditions the modem s 208 receiver for normal modulation detection COMPENSATED Conditions the 208 receiver for compensated modulation detection for improved performance with older 208 modems Retrain Threshold Hayes V 25bis dumb modes This option allows you to select either of two settings which implement pre defined thresholds for Speed Fallback retrain a...

Страница 66: ...stop sending answer tone and connect in Bell 103 mode without the usual multimode handshake When this option is disabled the ALX will handshake normally and will therefore take longer to complete a Bell 103 connection V 22bis S1 Duration Hayes V 25bis dumb modes This option affects the duration of the S1 signal during a V 22bis handshake To allow the ALX to connect properly with certain manufactur...

Страница 67: ...idden if you subsequently enable auto detect mode using the Standard option or V 3x 208 Quick Setup V 27bis 2400 bps Alternatives Not applicable to any Quick Setup mode This option is for V 27bis leased line operation only and it applies only to 2400 bps operation ALTERNATIVE I The V 27bis 2400 bps equalizer conditioning pattern is the same as for V 27bis at 4800 bps ALTERNATIVE II The V 27bis 240...

Страница 68: ...tion is useful for V 26 operation only When enabled the V 26 Scrambler option provides a V 26 scrambler in the data path Miscellaneous Options Operating Mode Fallback is explained on page 73 The Operating Mode Fallback option allows you to select V 22bis Bell 212A Bell 103 or V 22bis V 22 V 21 V 23 fallback operation TX RX Space Hayes V 25bis dumb modes This option allows you to specify long or sh...

Страница 69: ...hronous only dumb modes If speed conversion is not desired enable Speed Matching When Speed Matching is enabled the DTE interface rate follows the rate at which the modem connected i e DTE rate DCE rate To select speed matching change the Speed Matching setting to 1 enable Note Speed matching is effective only for dial applications and will only function if error correction or Buffer Mode is enabl...

Страница 70: ...ting T1 TIMER If the T1 timer setting is selected the ALX will attempt to handshake with a calling V 32 V 32bis modem for the time specified by the T1 Timer option V 32bis ANNEX A If the V 32bis Annex A setting is selected the modem will handshake according to the conventions established in Annex A of the ITU T V 32bis Recommendation Handshaking using the Annex A selection will generally be faster...

Страница 71: ...ons should not be set to RTS on off ON The state of RTS input TIA EIA pin 4 will be signaled to the remote modem s CD output and the CD pin 8 on the local modem will follow the state of the remote modem s RTS input The typical propagation delay is less than 800 ms OFF This setting allows for normal operation The state of RTS at the local modem will not be signaled to the remote modem Leased Line I...

Страница 72: ...ct V 25bis mode In V 25bis mode the originate modem sends a CFI AB result code when a call is aborted because the user has selected HANGUP from the front panel or because of DTR loss If the CFI AB Response on Disconnect option is enabled the originate modem will also send a CFI AB result code upon call disconnect Low Profile DIAG LED Function All modes This option may be used to change the functio...

Страница 73: ...of the modem are discussed in Chapter 6 Instructions for using the pushbutton controls and LCD are included in Chapter 2 QUICK RESET For a quick rest of the ALX modem use the front panel LCD to select RESET from MAIN MENU screen 3 As the modem resets it will display the power on screen for a few seconds and then the TIA EIA status screen A quick reset clears the modem s active memory for a new sta...

Страница 74: ...rage cell number or you may change edit a previously stored number A symbol next to a cell number indicates that a number is stored in the cell 3 Select PROG program from the PHONE CELL screen The LCD will display this screen If a number has been previously stored the number will be displayed on the top line of the LCD instead of dashes as shown above 4 Enter the number to be stored by using the f...

Страница 75: ...40 cells with 40 characters each If the available memory becomes full you will get an ERROR message and any entry stored in the phone cell where you tried to store a number will be deleted A possible solution is to issue the W command in Hayes mode only This will compress the data phone numbers stored in memory and may thereby create enough space for additional numbers to be stored How to Autodial...

Страница 76: ...rrent LINE OCCUPIED The data line is already in use DIAL NOT ALLOWED Modem is configured for leased line operation Note The phone number stored in the phone cell identified in the upper right corner of the AUTO DIAL screen is the number the ALX will dial for Front panel autodial when DIAL is selected from the AUTO DIAL screen Dial line auto recovery Chapter 3 Leased line auto recovery Chapter 3 DT...

Страница 77: ... V 32terbo V 32bis or V 32 modulation the ALX modem supports two fallback alternatives V 22bis Bell 212A Bell 103 fallback operation the default setting and V 22bis V 22 V 21 V 23 fallback operation For communication within the United States use the default setting for Operating Mode Fallback V 22bis Bell 212A Bell 103 Operating mode fallback functions when the modem is in either manual or automat...

Страница 78: ...ing to 1 This is the only way the Operating Mode Fallback setting can be changed Changing the Operating Mode Fallback setting to 1 has the following effects The modem will be configured for V 22bis 2400 bps V 22 1200 and 600 bps V 21 300 bps V 23 1200 75 bps fallback operation As a result 600 and 1200 75 bps will appear as additional selections on the Speed Limit data rate screens For 600 or 1200 ...

Страница 79: ...roprietary operation When Speed Fallback is enabled the default setting the ALX modem will automatically select the highest possible connect rate data rate depending on the signal quality during handshaking as explained below For these models the modem will automatically select or will fall back to ALX V 34 ALX V 34M 28 8 Kbps 26 4 24 0 21 6 19 2 16 8 14 4 or 12 0 Kbps or 9600 7200 4800 or 2400 bp...

Страница 80: ...e answer operation configure the remote modem for automatic or manual answer Use the dumb mode Bell 208 or V 3x 208 Quick Setup to configure the modem The dumb mode Quick Setup defaults to asynchronous operation the Bell 208 and V 3x 208 Quick Setups default to synchronous operation Any of these three Quick Setups will set the modem to originate mode If you want to set your modem to answer mode us...

Страница 81: ...wait until he or she hears an answer tone and then switch to data mode select DATA When both modems are in data mode data communication begins The LCD displays the status of the connection Terminating a Data Call There are several ways to terminate a data call One way is through communication software by following the software manufacturer s instructions Alternate methods are Select TALK talk mode...

Страница 82: ... point or multidrop applications For configuration details for these applications see V 13 Operation in Chapter 2 The ALX normally operates in full duplex however some applications such as certain network environments may require control of a remote CD signal by a local Request to Send RTS signal V 13 operation allows a local RTS control of a remote CD signal without actual ON OFF switching of the...

Страница 83: ...page 8 to select Quick Setup 13 4 WLL V 29 4 wire leased line V 29 mode 2 Use the front panel LCD to change the Communication Standard option to V 26 3 Use the LCD to change the Carrier Type option to switched SWITCH Configuration for V 26bis Dial Line Mode To configure the ALX modem for V 26bis dial operation follow these steps 1 Follow steps 1 2 and 3 above under Configuration for V 26 Leased Li...

Страница 84: ...plication so it will automatically redial to restore a broken connection if the modem goes on hook In this way the Dial Line Auto Recovery feature emulates the reliability of a leased line connection Setting up the ALX for Dial Line Auto Recovery Three steps are required to set up the modem for Dial Line Auto Recovery 1 Store the phone number to be dialed and include the R dial line auto recovery ...

Страница 85: ...hone number for auto recovery is stored To disable Dial Line Auto Recovery select RESET from MAIN MENU screen 3 Recovery Procedure If Dial Line Auto Recovery is enabled and the modem goes on hook it will redial the stored phone number up to 10 times It will redial 5 times at 30 second intervals wait 2 hours and then redial 5 additional times at 30 second intervals The modem stops redialing after 1...

Страница 86: ...UTO DIAL screen or change the phone cell currently selected for auto recovery and front panel autodialing see page 71 Auto answer must be enabled on the answer modem Autodial Backup The ALX will automatically dial the stored number to connect over the backup line if it detects poor signal quality ER or a loss of carrier detect CD on the leased line The criteria used by the ALX in assessing the con...

Страница 87: ...g options allow you to specify the criteria the ALX will use in determining when to enter and exit the Leased Line Auto Recovery mode Leased Line Auto Recovery Select SELECT This option determines the type of Leased Line Auto Recovery desired DIAL IF BAD 1 2 3 or 4 min or DIAL IF BACK 30 s seconds means dial backup will occur if bad line conditions are present for the specified selected time perio...

Страница 88: ...able based on the criteria selected for return from Auto Recovery The ALX can be set to test every 10 20 40 or 60 minutes Note The Test option setting must be the same on both units In asynchronous mode with error correction or buffering enabled no data can be transmitted or received during the test period Test Type for Leased Line Auto Recovery This option is available only on special ALX models ...

Страница 89: ...d MPP is available on all ALX models in Hayes mode only APP and MPP may be programmed to include or not include security callback Automatic Password Protection APP APP which uses the ALX security handshake is available on the ALX V 32M V 32 14 4M V 32 19 2M and V 34M only The ALX can be configured for two types of APP APP without callback The ALX can be configured so that each time it receives a c...

Страница 90: ...use trellis coding After a connection has been established using the security handshake and automatic password and callback phone number if used a flashing S will be displayed in the top left corner of the TIA EIA status screen to indicate that a secure connection has been made If the modem is in a dial mode S and D for dial line occupied will flash alternatively The APP process is summarized belo...

Страница 91: ...dem s memory for APP or MPP APP with callback will not function if the master password is removed Use the Hayes AT Z command to store the user password and callback phone number in the answer modem s memory Password Screens For either type of APP a password must be preprogrammed through the PASSWORD screen of both the answer and originating modems as explained below The PASSWORD screen is displaye...

Страница 92: ...m for APP with callback Valid password characters are A through Z upper case or lower case 0 through 9 and the following symbols Spaces function as valid password characters therefore a password that includes spaces will only match another password with spaces in the same positions Note however that a space in the first character position will disable the password When the LCD cursor is in the sam...

Страница 93: ...GRAPE The callback number phone number of the originating modem in this example is 555 1212 with T used to specify tone dialing The user password is GRAPE When the user password is entered on the front panel password screen of the originating modem a space is required at the end Do not use a space at the end when storing the password with the AT Z command A remote user can now call from the specif...

Страница 94: ...r MNP or buffer mode The ALX can be configured for two types of MPP MPP without callback The ALX will pass a connection on to the DTE interface only after it receives a valid password MPP with callback The answer ALX will call back an authorized user after he or she enters a valid password Both types of security operation provide security on incoming calls by requiring remote users to manually ent...

Страница 95: ...mands listed in Table 3 1 To implement a security command use the Hayes AT Z command to store the command in a specific phone cell The password commands are listed in Table 3 1 and explained in detail in the sections that follow Command Function Example 1 Phone cell 2 A Set change administrative password password protects use of certain Hayes commands Z1 ASECURITY 1 P Set password for MPP without ...

Страница 96: ... the specified text string only in cell 0 Do not include spaces or dialing modifiers in the text string How to Use Password Commands To Establish or Change the Administrative Password An administrative password is not required for security operation but for greatest security an administrative password should be used When implemented the administrative password controls access to the Hayes compatib...

Страница 97: ... for MPP without callback operation For example the following command string programs phone cell 5 for MPP without callback AT Z5 PYELLOW The password is YELLOW After the modems connect the remote user presses the DTE Enter key once The DTE will then prompt the user to enter the assigned password by displaying the PASSWORD query If the user enters the correct password YELLOW the call will be conne...

Страница 98: ...not be informed that a password is required however a password will nonetheless be required if an MPP password has been implemented The only difference will be the absence of the PASSWORD query message To suppress the PASSWORD message refer to Appendix C and the V 42 ERROR CORRECTION OPTIONS diagram Change the PASSWORD query message setting shown in the diagram from 1 the factory setting to 0 Disa...

Страница 99: ...ure equipped with an intelligent rack controller can control Another modem in the same rack or A remote modem connected to any modem in the rack For both types of remote control the controlling modem and the controlled remote modem must be connected at a data rate that uses trellis coding This does not apply however if both modems are installed in the same rack and the rack is equipped with a rack...

Страница 100: ...creen by selecting TEST These test options remote digital loopback and remote digital loopback self test are described in Chapter 6 Exiting from Remote Control Mode To exit from remote control mode press the ENT pushbutton 5 times in succession on the front panel of the controlling modem If the remote modem resets as a result of a configuration change the local modem will appear to have no control...

Страница 101: ...ontrol If you want to specify the modem by its address select ADDR C address control on the bottom line of REMOTE screen 2 Note Each modem must have a unique address If you want to specify the modem by its slot number select SLOT C For slot 16 use 00 or 16 whichever is displayed on your modem Press pushbutton 2 to toggle between ADDR C and SLOT C slot control 2 Enter the address or slot number To ...

Страница 102: ...made When the connection is made all characters on the LCD of the controlling modem will be in lowercase instead of capitals this indicates that the screens displayed are for the controlled modem Buttons pressed on the front panel of the controlling modem will affect the controlled modem and not the controlling modem If the specified modem is not present or is not working the LCD will display a NO...

Страница 103: ...e from the DTE to the ALX diagnostic port Pin assignments for the diagnostic port are listed in Appendix D Enter a command to switch the modem s DB 25 DTE connector to function as a diagnostic port For a modem installed in a rack enclosure make sure the rack is equipped with an intelligent rack controller and connect the DTE serial port to the rack controller In addition to the physical connection...

Страница 104: ...wever if you add an X to the JMP command JMPX the diagnostic port data rate selected via the P command will remain effective until the modem is powered down or reset Method 3 Modem in a Rack Enclosure For information on connecting the DTE to the rack controller see the rack controller instruction manual Control Link Data Rate You can specify the diagnostic port data rate by using the Hayes mode P ...

Страница 105: ... RESET command because RESET does not break the control link Table 3 2 Control Commands Command Function CONNECT g u Connect to diagnostic port of modem at group address g unit address u An address must be specified unless the wildcard character is used CONNECT meaning Connect to local modem address unknown unspecified When the connection is made the DTE will display the modem s address Echo line ...

Страница 106: ...an be entered in upper or lower case Responses to Control Commands In response to the control commands Table 3 2 the ALX may display the responses listed in Table 3 3 on the DTE monitor Table 3 3 Responses to Control Commands Response Meaning ERROR Command error incomplete wrong syntax etc If CONNECT or CON is issued without an address or the modems will not connect and there will be no ERROR mess...

Страница 107: ...sed Display of Selected Options Flashing Characters On the ALX front panel LCD a selected option choice flashes on and off so it can be easily identified as the current selection When an LCD display is sent to the DTE in response to the CONNECT command characters that are flashing on the actual LCD are indicated on the DTE screen by asterisks An asterisk appears below each flashing character In th...

Страница 108: ...OADING Raymar Telenetics continually updates its modem software to provide new features and the highest possible level of performance By using the ALX modem s software downloading capability you can update the modem s internal software to the latest available revision level at a fraction of the cost of buying a new modem This section explains local downloading meaning the new modem software is dow...

Страница 109: ...ftware program to send the modem software file s from the DTE to the ALX A DTE speed of 115 2 Kbps or higher is recommended At lower DTE speeds downloading will be very slow Downloading Procedure You can use the following procedure to download new software to The modem controller user interface software The modem s data pump line interface software or The controller and data pump in a single opera...

Страница 110: ... command the download process is automatic The ALX checks the file for compatibility with the modem s hardware It also makes sure the file type controller pump or both corresponds to the command you have sent AT C AT P or AT M If these checks indicate a problem you will be advised by a message on the DTE screen and the modem will return to normal operation using the original software If the file p...

Страница 111: ...If for any reason downloading cannot proceed the DTE will display a Download aborted message that will include the reason for the failure and the modem will resume normal operation If you encounter this message or any other difficulty contact Raymar Telenetics Technical Support Team ...

Страница 112: ...yes emulation mode is enabled the ALX modem emulates a Hayes autodialer and functions much like a Hayes modem Commands are issued from the computer keyboard or other DTE and the ALX modem is compatible with software written to drive a Hayes style AT command set Enabling the Hayes Mode Autodialer The Hayes mode autodialer can be enabled in either of two ways by using the Quick Setup feature or by s...

Страница 113: ...command or after the dial command if it is terminated with a semicolon for example AT M2 V1 D 555 1212 S2 1O This instructs the ALX to Keep speaker on M2 send word result codes V1 dial D 555 1212 end dial command set register 2 to 1 S2 1 and go on line and wait for carrier O Dashes or spaces can be included in the telephone number to make it easier to read AT DT 9 212 555 1234 or AT DT 9 212 555 1...

Страница 114: ...ess Result code options are selected using the V and X commands Result codes may be words V1 command or digits V0 Result codes 0 4 comprise the basic result code set OK CONNECT RING NO CARRIER and ERROR Codes 5 and higher provide additional response information as explained in Table 4 3 Various combinations of these codes can be enabled or disabled by using the X command and its five parameters as...

Страница 115: ...For Hayes commands that control modem options additional information on options may be found in Chapter 2 Commands are listed in alphabetical order in this section and in Table 4 1 For most commands there are parameters numerical values used with the command that specify the function of the command For example the command L controls the modem s speaker volume L2 sets the volume to medium The defau...

Страница 116: ...on where the number to be dialed will be stored Up to 50 numbers may be stored in phone cells 0 49 S c may be placed anywhere in the dial string for example AT D2345S 27 will dial 2345 and the number stored in phone cell 27 However if the characters specified after AT D 2345 in this case plus the contents of the specified cell contents of cell 27 exceed 50 characters you will get an error message ...

Страница 117: ...e numbers will be dialed in a loop until a connection is established or until 10 calls have been attempted The L modifier can be used 9 times in succession meaning that up to 10 linked calls can be attempted The time between call attempts is 3 seconds O Forced on line This command applies to asynchronous operation only When the modem is on line you can return to the command state by entering the e...

Страница 118: ...he Z command recalls a profile of the modem configuration settings previously saved using the W command resets the modem and makes the recalled profile profile 0 or 1 active A user profile is designated as profile 0 or profile 1 when it is saved using the W command Pause A comma causes the modem to pause for 2 seconds or time specified in register S8 before processing the next character in a dial ...

Страница 119: ... V View active configuration etc This command displays the active modem configuration user profiles stored using the W command and phone numbers stored using the Z command When V0 is invoked the DTE displays the modem configuration including S registers and the contents of phone cells 0 through 5 Parameters 1 through 5 may be used with V e g V3 to display the contents of additional phone cells For...

Страница 120: ... S command displays the active V 42 error correction configuration stored V 42 profiles and certain other data not displayed by the V command S REGISTERS The ALX modem includes S registers that can be used to control specific modem operations Each register holds a value that serves as a specific operating instruction for the modem Several of the S registers affect how the previously described comm...

Страница 121: ...nter AT the modem displays the current value in the S7 register Similarly if you enter AT 8 the modem will change the value in the S7 register to 8 S Register Functions This section describes the function of the individual S registers Table 4 4 lists the range of possible parameters and the default value for each S register Only S registers that are intended for user access are listed S0 Ring to a...

Страница 122: ...X will wait for dial tone if the W modifier is included in a dial string or the wait time for silence if the modifier is used Note For V 32bis connections register S7 should not be set to less than 20 seconds S8 Pause time Register S8 specifies the pause time that results when a comma is included in a dial string or other command line Note An S8 value of less than 3 0 1 or 2 will yield a pause tim...

Страница 123: ... initiates a call using asynchronous methods but once the connection is fully established automatically switches to synchronous operation A delay occurs after a connection has been made before the modem examines the DTR signal The length of this delay is the value specified in S25 in seconds The delay allows the operator time to disconnect the modem from an asynchronous data terminal and attach it...

Страница 124: ...e values that may be stored have the same definitions i e they correspond to the same data rates as listed in the table below However the values in each register are applied differently as indicated in the table above For example a value of 2 in register S43 sets the maximum TX DCE rate to 24 0 Kbps if the modem is an ALX V 34 or V 34M while a value of 2 in register S44 sets the minimum TX DCE rat...

Страница 125: ...e transmit level for leased line operation Enter a value of 0 to 15 to select a transmit level of 0 to 15 dBm Any value higher than 15 will result in a transmit level of 15 dBm To select the transmit level type for dial line operation see the L command in Table 4 1 S61 DTE speed This register controls the DTE speed however it is effective only when the ALX is operating in V 42 mode MNP mode or buf...

Страница 126: ...ons in Hayes mode are to use the AT commands listed in Table 4 1 or the ALX front panel If an option is changed using an AT command the change will be effective for Hayes mode only unless option changes are saved to memory If you change an option using an AT command and then switch to a different mode without saving the change the front panel display LCD will remain unaffected User Profiles Change...

Страница 127: ...ont panel including Summary Setup the changes for options for which there are associated Hayes commands will be saved to the default profile when you exit the SETUP menu If you change the active profile by using Hayes commands or via the AT PROFILES screen the changes are immediately effective and are reflected on the LCD However the changes will be permanent only if you save them by exiting the S...

Страница 128: ...y be required to choose the interface mode fax class to be used by the software and the ALX You must select a fax class 1 or 2 that is supported by both the software program and the modem If the software and the modem both support both fax classes you can select either one The fax class defines the protocol used for communication between the modem and the computer it is connected to The fax class ...

Страница 129: ...his command D DIAL ORIGINATE MODE FOR DIALING Instructs modem to dial the number that follows the D command and attempt to go on line For example AT D3331234 tells the ALX to dial the number 333 1234 Dialing modifiers listed in Table 4 2 may be used with the D command E0 E1 ECHO No echo Echoes all characters back to terminal screen when using a full duplex terminal and in local command mode H0 H1 ...

Страница 130: ...volume Medium volume High volume M0 M1 M2 M3 SPEAKER CONTROL Speaker always off Speaker on until carrier is detected Speaker always on Speaker off during dialing otherwise on until carrier is detected O0 O1 FORCED ON LINE Forces ALX to on line state Forces ALX to on line state then initiates retrain P PULSE DIAL No parameters Default dialing mode is tone dialing Q0 Q1 Q2 SEND RESULT CODES Send res...

Страница 131: ...X space disconnect Enables RX space connect and TX space disconnect Enables TX space disconnect disables RX space disconnect Enables RX space disconnect disables TX space disconnect Z0 Z1 RECALL STORED USER PROFILE Resets modem and makes stored user profile 0 active Resets modem and makes stored user profile 1 active C0 C1 C2 DATA CARRIER DETECT CONTROL DCD always on when DTR is present true DCE o...

Страница 132: ...cally dial the phone numbers stored in the phone cell displayed in the front panel AUTO DIAL screen See also S25 in the S Registers section of this chapter R0 R1 R2 R3 RTS AND CTS OPTIONS CTS follows RTS CTS follows DTR from the DTE true CTS is on while the modem is on line normal CTS is always on S0 S1 S2 DATA SET READY CONTROL DSR follows DTR supplied from the DTE true DSR is on when the modem i...

Страница 133: ...X2 TRANSMITTER CLOCKING Selects internal clocking Selects external clocking Selects receive mode slaved clocking Y0 Y1 DEFAULT USER PROFILE Stored user profile 0 will be recalled on powerup Stored user profile 1 will be recalled on powerup Z STORE TELEPHONE NUMBER Parameters are 0 49 phone cells 0 49 A0 A1 A2 A3 MNP BLOCK SIZE 1 Selects maximum MNP block size 64 bytes 128 bytes 192 bytes 256 bytes...

Страница 134: ...r correction Enables mandatory mode for error correction Enables V 42 error correction only Enables automatic mode for error correction P0 P1 P2 V 42 PROTOCOL 1 Selects LAPM protocol only Selects MNP protocol only Selects LAPM MNP protocol MNP as alternate Q 0 1 2 3 V 42 FLOW CONTROL 1 Two parameters may be used e g Q0 1 Q3 2 etc First parameter specifies DCE DTE flow second optional specifies DTE...

Страница 135: ...to V 25bis mode asynchronous Switches to V 25bis mode sync bit oriented HDLC Switches to V 25bis mode synchronous character oriented L0 L1 TRANSMIT LEVEL DIAL Selects permissive transmit level Selects programmable transmit level F0 F1 F2 F3 F4 F5 F6 F7 F8 COMMUNICATION STANDARD For explanation see Communication Standard in Chapter 2 AUTO V34 V34 AUTO V32 V33 Bell208 V3x Bell208 V29 V27 V26 N1 ALTE...

Страница 136: ...board R Configures modem for Dial Line Auto Recovery See Dial Line Auto Recovery section in Chapter 3 comma or Pause for 2 seconds or other period specified in register S8 semicolon Return to command state after dialing or Flash hook Wait for silence Dial This character is sometimes used for access to remote computer systems tone dialing only Dial This character is sometimes used for access to rem...

Страница 137: ...ing modifier 21 CONNECT 16 8 Carrier detected at 16 8 Kbps 22 CONNECT 19 2 Carrier detected at 19 2 Kbps 72 DIALING ALX is dialing 73 CONNECT 21 6 Carrier detected at 21 6 Kbps 74 CONNECT 24 0 Carrier detected at 24 0 Kbps 75 CONNECT 26 4 Carrier detected at 26 4 Kbps 76 CONNECT 28 8 Carrier detected at 28 8 Kbps Extended V 42 result codes use V1 to enable Word codes are BUFFER MNP V42 and V42bis ...

Страница 138: ...c 2 S7 Wait time for carrier or dial tone 1 255 sec 30 S8 Pause time for comma 0 255 sec 2 S9 Carrier detect response time 1 255 1 10 sec 6 S10 Delay time between loss of carrier and hang up 1 255 1 10 sec 14 S11 Tone spacing 70 255 ms 70 S12 Escape sequence guard time 0 255 1 50 sec 50 S18 Test timer 0 255 sec 0 S25 Delay to DTR 0 255 sec or 1 100 sec 1 5 1 Depends on mode see previous section S2...

Страница 139: ...message format ENABLING THE V 25bis AUTODIALER The V 25bis autodialer can be enabled in either of two ways by using the Quick Setup feature or by selecting one of the Dialer Mode options Quick Setup Three Quick Setup configurations are available for 2 wire dial V 25bis operation Selecting any of the three V 25bis Quick Setups via QUICK on SETUP screen 1 enables the V 25bis autodialer and causes al...

Страница 140: ...dix C to change the parameter for V25bis DTR dialing to 1 Do not select DTR dialing via the front panel DIALER screen this will not enable DTR dialing for V25bis mode V 25bis DTR dialing will function only if the V25bis DTR dialing parameter is enabled set to 1 and the V 25bis autodialer is enabled V 25bis AUTODIALER COMMANDS In asynchronous applications V 25bis commands are issued directly from t...

Страница 141: ...In the event of a reset the modem will answer if auto answer is enabled from the front panel PRN Program normal store phone number Syntax PRN 17 5551212 The PRN command is used to store a telephone number or dial string in a phone cell so it can be dialed later by specifying only the phone cell number As shown above PRN is followed by the phone cell number a semicolon and the phone number to be st...

Страница 142: ...aler Commands Command Functions CIC Connect next incoming call CRN n Call request dial number n entered on DTE keyboard CRS c Call request dial number stored in specified phone cell c DIC Disregard incoming calls PRN c n Program normal store number or dial string n in phone cell c RHA Switch to Hayes dialing mode RLN Request list of all stored numbers RLN c Request to see number stored in phone ce...

Страница 143: ...o stored number ORG CFI NT Call failure no answer tone Remote unit answered but did not issue answer tone ORG CFI RT Call failure ring tone Ringback detected but no answer ORG 1 Column 3 indicates which modem sends the result code ANS ORG indicates answer and or originate modem Underlines in column 2 indicate derivation of the result code i e relation of the code to its meaning A semicolon is used...

Страница 144: ...The 8 bit data units are formed by a 7 bit IA5 character and an even parity bit Synchronous Character Oriented SYN SYN STX MESSAGE ETX This format uses consecutive 8 bit data units formed by a 7 bit IA5 character and an odd parity bit Synchronous Bit Oriented FLAG ADDR CTRL MESSAGE FCS FLAG FF 13 Consecutive 8 bit data units are used within the message and submitted to the HDLC framing zero insert...

Страница 145: ...ld be to specifically isolate the defective component in your communications system This typically involves three steps 1 Assess the problem Carefully consider each of the following questions When did the problem begin What is malfunctioning Try to isolate the component or components of your system that is malfunctioning The tests described in this chapter may help you in making this determination...

Страница 146: ...u identify the symptoms and conduct a physical inspection of the sites in question you can conduct diagnostic monitoring and testing to further isolate the problem The ALX modem has diagnostic capabilities that will help locate faults quickly and easily The diagnostic features of the ALX modem fall into two categories local and remote There are six types of local modem diagnostics Analog loopback ...

Страница 147: ...AT commands Prerequisite Steps For valid results from any of the digital loopback tests DLB RDL and RDLST or external analog loopback tests ALBX and ALXST error correction must be disabled before diagnostic tests are run There are two ways you can disable error correction Using the front panel LCD Set the V 42 Mode option to OFF Using AT commands Hayes mode only Enter the command F to restore the ...

Страница 148: ...ally made during the test Figure 6 1 Analog loopback test Before initiating the test make sure the modem is idle that the data rate is the same as that of the DTE and that the DTR circuit is on If TR is present on the TIA EIA status screen the DTR circuit is on Hayes mode T1 Initiate the analog loopback test by entering AT T1 on the DTE keyboard Then check for proper operation of the DTE and modem...

Страница 149: ...F Pin 18 Control The ALB test can also be activated by positive voltage on TIA EIA pin 18 if the ALB DTE Ctrl ed option is enabled Analog Loopback Self Test ALBST In the analog loopback self test the modem is placed in analog loopback and data is sent and received by an internal 511 bit pattern generator and receiver therefore no DTE or external BERT is necessary Figure 6 2 shows the data flow for...

Страница 150: ...ceiver therefore no DTE or external BERT is necessary This test differs from the ALBST in that errors are injected into the data flow every few seconds The data flow is the same as that shown in Figure 6 2 the ALBST To run this test follow these steps From screen 2 of the LCD MAIN MENU select TEST This will take you to screen 1 of the LOCAL TEST menu where ST E will be visible as one of the select...

Страница 151: ... that the leased line circuit is complete The test is not meant to assess the suitability of the leased line To run this test follow these steps Make sure the local modem is not in communication with the remote modem that the data rate is the same as that of the DTE and that the DTR circuit is on If TR is present on the TIA EIA status screen the DTR circuit is on From screen 2 of the LCD MAIN MENU...

Страница 152: ...e sent and received by an internal 511 bit pattern generator and receiver therefore no DTE or external BERT is necessary As shown in Figure 6 4 the test circuit includes the leased lines the external loopback IMPORTANT The ALXST may result in errors or may fail altogether even where conditions are satisfactory for normal operation This is because the test channel presented to the modem during the ...

Страница 153: ...n to the ANALOG ST EXT screen and then select OFF Digital Loopback Test DLB Digital loopback testing determines the operational performance of the local modem the remote modem and the telephone line as a composite system Test data is sent from the DTE or external BERT to the remote modem and then to the local modem where it is regenerated and looped back to the remote modem and then back to the DT...

Страница 154: ...operation of the modems and phone lines by transmitting test data and comparing it at the remote site with the received test data Front Panel Control From screen 2 of the LCD MAIN MENU select TEST Go to screen 2 of the LOCAL TEST menu and select DLB The DIGITAL LOOPBACK screen will be displayed Select ON to activate the test The TIA EIA status screen will be displayed while the test is being condu...

Страница 155: ...annot be initiated unless the Remote Test option is enabled on the remote modem This option also REMOTE TEST on the LCD is accessed via SETUP screen 4 Remote Digital Loopback RDL Test The RDL test Figure 6 6 tests the local modem remote modem and telephone line from the local site For this test both modems should be on line Ensure that the DTR circuit is on If TR is present on the TIA EIA status s...

Страница 156: ... test press the ENT pushbutton to return to the REMOT DIGIT LOOP screen and then select OFF Pin 21 Control The RDL test can also be activated by positive voltage on TIA EIA pin 21 if the RDL DTE Ctrl ed option is enabled Remote Digital Loopback Self Test RDLST The RDLST tests the local modem remote modem and telephone line from the local site as did the previous test except that the test data is g...

Страница 157: ...is detecting errors If numerous errors are detected steps should be taken to try to identify their source STATUS SCREEN Numerous status screens are available for monitoring modem activity TIA EIA Status Screen The primary status screen the TIA EIA status screen is illustrated and explained in Chapter 1 Handshake Display When two modems establish a connection they engage in an exchange known as a h...

Страница 158: ...st possible signal quality is indicated when the bar graph extends all the way to the right edge of the LCD Line Levels Screen This screen shows the selected configured transmit signal level TX and the actual measured receive signal level RX The RX value is the approximate local receive level of the incoming signal The range of measurement for RX is from 0 to 43 dBm in 1 dBm increments If the sign...

Страница 159: ...ically when a dial call disconnects but in leased line modes including dial backup auto recovery they reset only if you press pushbutton 2 with the packet screen displayed or reset the modem by selecting RESET Mode and Rate Screen This screen shows the following data MODE Below MODE this screen indicates the error correction status Display Error correction status NORMAL Error correction and buffer...

Страница 160: ... TIA EIA status screen so you can see the result of the rate change request i e the current data rate which is displayed in the lower left corner of the TIA EIA status screen However if the local ALX has reached the minimum or maximum speed it will not switch to the TIA EIA status screen Note A request to increase the data rate may result in no change in the data rate if the signal quality is poor...

Страница 161: ...atures include Hayes compatible or V 25bis automatic call origination V 42 V 42bis and MNP error correction automatic dial backup for leased line applications internal storage of up to 50 telephone numbers facsimile operation fax classes 1 and 2 and a full repertoire of ITU T V 54 diagnostic capabilities More than 100 user selectable options allow you to configure the modem for optimum performance...

Страница 162: ...00 bps 2 9600 and 4800 bps 9600 7200 and 4800 bps 4 9600 7200 bps 4 4800 and 2400 bps 4 4800 2400 bps 4 2400 and 1200 bps 4 2400 bps 1200 and 600 bps 300 bps 14 4 and 12 0 Kbps 9600 and 7200 bps 4 4800 bps 2 1200 bps 0 300 bps Proprietary 19 2 and 16 8 Kbps modulation 3 Proprietary V 29 fast training 5 1 ALX V 34 and V 34M only 2 All ALX models except ALX V 32 and V 32M 3 ALX V 34 V 34M V 32 19 2 ...

Страница 163: ...V 32 QAM at 14 4 12 0 Kbps 9600 7200 and 4800 bps full duplex over 2 wire line Trellis coded at 7200 bps and higher coded or non coded at 9600 bps V 29 QAM at 9600 7200 and 4800 bps V 27 8 phase DPSK at 4800 and 2400 bps V 26 4 phase DPSK at 2400 and 1200 bps V 23 FSK at 1200 75 bps full duplex V 22bis QAM at 2400 bps bandsplit full duplex V 22 DPSK at 1200 and 600 bps bandsplit full duplex V 21 F...

Страница 164: ...selectable Dial line 26 33 or 43 dBm selectable RTS CTS delays resulting from training Mode V 33 V 29 V 29 V 27 V 27 V 27 V 27 V 26 V 26 Rate bps All rates All rates All rates 4800 4800 2400 2400 2400 2400 Training Short Long Short Long Short Long Short Long Delay ms 1393 26 253 50 708 67 943 35 96 In V 27 mode if the Echo Protection Tone option is enabled CTS delay increases by 205 ms Test capabi...

Страница 165: ...cific model Rack mount Compatible with 117 or 220 VAC rack enclosure depends on specific model Power consumption 8 Watts Environment Ambient temp 0 to 50ºC 32 to 122ºF Storage temp 20 to 70ºC 4 to 158º F Relative humidity 10 to 95 Dimensions stand alone unit Width 24 6 cm 9 7 inches Height 6 35 cm 2 5 inches Depth 25 7 cm 10 1 inches Weight Stand alone 1 9 kg 4 lb 2 oz Full size rack mount 0 9 kg ...

Страница 166: ...n which they appear on the LCD flow chart Instructions for selecting Quick Setups are included in Chapter 1 Note Some options do not apply to all Quick Setup modes that is in some Quick Setup modes some options have no effect However Tables B 1 and B 2 list the default settings for all options for each Quick Setup because each Quick Setup sets the entire modem configuration all options to default ...

Страница 167: ...le Enable ASYMM DATA RATES Enable Enable Enable Enable Enable Enable TRELLIS CODING TYPE NEG NEG NEG NEG NEG NEG PRE EMPH FILTER NEG NEG NEG NEG NEG NEG MANDAT CARRIER Low Low Low Low Low Low PRECODING NEG NEG NEG NEG NEG NEG 1 V 25bis synchronous configurations character and bit oriented are the same as the V 25bis asynchronous configuration except as follows V 42 MODE is OFF BUFFER is disabled D...

Страница 168: ... K MAX TX SYM 3429 3429 3429 3429 3429 3429 MIN TX SYM 2400 2400 2400 2400 2400 2400 MAX RX SYM 3429 3429 3429 3429 3429 3429 MIN RX SYM 2400 2400 2400 2400 2400 2400 Speed Limit Option ALX V 32 V 32M V 32 14 4 V 32 14 4M V 32 19 2 V 32 19 2M MAX DCE RATE 19 2 K 5 19 2 K 5 19 2 K 5 19 2 K 5 19 2 K 5 14 4 K MIN DCE RATE 300 300 300 4800 4800 12 0 K V 42 error correction options V 42 MODE Auto Auto1...

Страница 169: ...Disable Miscellaneous ADDRESS 6 999 999 999 999 999 999 999 999 999 999 999 999 DIALER MODE Hayes V25bis Asyn 1 OFF OFF OFF OFF AUTO ANSWER Enable Enable Enable Disable Disable Disable Data format options DATA TYPE Async Async 1 Async Sync Sync Sync CHAR LENGTH 10 10 10 10 10 10 PARITY None Even 1 None None None None Disconnect options RX SPACE DISC T Enable Enable 1 Enable Disable Disable Disable...

Страница 170: ...mal Normal Normal True True True ALB DTE CTRL ED Disable Disable Disable Disable Disable Disable RDL DTE CTRL ED Disable Disable Disable Disable Disable Disable TM TO EIA Normal Normal True True True True Modem setup options CD LEVEL LEASED 26 dBm 26 dBm 26 dBm 26 dBm 26 dBm 26 dBm CD LEVEL DIAL 43 dBm 43 dBm 43 dBm 43 dBm 43 dBm 43 dBm TX LEVEL LEASED 0 dBm 0 dBm 0 dBm 0 dBm 0 dBm 0 dBm SIGNAL QU...

Страница 171: ...OL Medium Medium Medium Medium Medium Medium GUARD TONES OFF OFF OFF OFF OFF OFF V 8 PROC Enable Enable Enable Enable Enable Enable V 13 OPERATION OFF OFF OFF OFF OFF OFF TRAINING LENGTH Long Long Long Long Long Long CARRIER Switched Switched 7 Switched Switched Switched Constant CTS RTS RTS 7 RTS RTS RTS RTS RTS CTS DELAY 0 0 7 0 0 0 0 Auto Recovery options AUTO RECV SELECT None None None None No...

Страница 172: ...e Enable Enable Enable ASYMM SYMBOL RATES Disable Disable Disable Disable Disable OPTIONAL SYMBOL RATES all 3 rates Enable Enable Enable Enable Enable ASYMM DATA RATES Enable Enable Enable Enable Enable TRELLIS CODING TYPE NEG NEG NEG NEG NEG PRE EMPH FILTER NEG NEG NEG NEG NEG MANDAT CARRIER Low Low Low Low Low PRECODING NEG NEG NEG NEG NEG 1 Not available on the ALX V 32 and ALX V 32M The V 3x 2...

Страница 173: ...00 2400 MAX RX DCE 28 8 K 28 8 K 28 8 K 28 8 K 28 8 K MIN RX DCE 300 300 300 2400 2400 MAX TX SYM 3429 3429 3429 3429 3429 MIN TX SYM 2400 2400 2400 2400 2400 MAX RX SYM 3429 3429 3429 3429 3429 MIN RX SYM 2400 2400 2400 2400 2400 Speed Limit option ALX V 32 V 32M V 32 14 4 V 32 14 4M V 32 19 2 V 32 19 2M MAX DCE RATE 4800 9600 9600 9600 4800 MIN DCE RATE 4800 4800 4800 4800 2400 V 42 error correc...

Страница 174: ...e Disable Disable Disable Disable Miscellaneous ADDRESS 2 999 999 999 999 999 999 999 999 999 999 DIALER MODE OFF OFF OFF OFF OFF AUTO ANSWER Enable Enable Disable Disable Enable Data format options DATA TYPE Sync Sync Sync Sync Sync CHAR LENGTH 10 10 10 10 10 PARITY None None None None None Disconnect options RX SPACE DISC T Disable Disable Disable Disable Disable TX SPACE DISC T Disable Disable ...

Страница 175: ...M EIA Normal True True True Normal ALBT DTE CTRL ED Disable Disable Disable Disable Disable RDL DTE CTRL ED Disable Disable Disable Disable Disable TM TO EIA True True True True True Modem setup options CD LEVEL LEASED 26 dBm 26 dBm 26 dBm 26 dBm 26 dBm CD LEVEL DIAL 43 dBm 43 dBm 43 dBm 43 dBm 43 dBm TX LEVEL LEASED 0 dBm 0 dBm 0 dBm 0 dBm 0 dBm TX LEVEL DIAL Permis Permis Permis Permis Permis SI...

Страница 176: ...il CD Til CD Til CD SPKR VOL Medium Medium Medium Medium Medium GUARD TONES OFF OFF OFF OFF OFF V 8 PROC Enable Enable Enable Enable Enable V 13 OPERATION OFF OFF OFF OFF OFF TRAINING LENGTH Long Long Short Short Short CARRIER Switched Constant Constant Switched Switched CTS RTS RTS RTS RTS RTS RTS CTS DELAY 150 ms 0 0 0 0 Auto Recovery options AUTO RECV SELECT None None None None None AUTO RECV R...

Страница 177: ...e is very little guidance on the LCD screen to indicate which option is being changed The Quick Change configuration screens are the Summary Setup screen AT PROFILES screen and S REG screen These screens are briefly identified below For details refer to the following pages Summary Setup screen This screen allows you to change all ALX options that can be accessed through the front panel LCD and sev...

Страница 178: ...s stored phone numbers or Hayes mode autobaud settings Note Changes made through the Quick Change configuration screens modify the active modem configuration and are saved to memory when you exit the SETUP menu SUMMARY SETUP The ALX Summary Setup feature allows you to change all ALX options that can be accessed through the front panel LCD and several options that can only be accessed or changed th...

Страница 179: ...ll scroll one character at a time Pushbutton 2 changes the flashing value i e the current option setting When you press pushbutton 2 the LCD cycles through the possible values settings The right arrow button moves the screen to the beginning of the next group of options to the right The left arrow button moves the screen to the beginning of the next group of options to the left Groups of options a...

Страница 180: ...gs for each ALX model can only be set within the range shown in the table in Chapter 2 The default maximum rate MAX TX DCE RATE and MAX RX DCE for each model is the highest rate shown in the table in Chapter 2 For example the default MAX DCE RATE setting for the ALX V 32 19 2M is 4 19 2 Kbps Speed Limit Symbol SYM rates See V 34 RELATED OPTIONS later in this Appendix Communication standard Not all...

Страница 181: ...odems USER MANUAL 08 05 2010 Rev A Page 177 of 197 Options shown in bold type are accessible only via Summary Setup screens Options in normal type can also be accessed through additional individual LCD screens e g the TX LEVEL screen ...

Страница 182: ...0049 2702 XXX Alliance Series Modems USER MANUAL 08 05 2010 Rev A Page 178 of 197 ...

Страница 183: ...0049 2702 XXX Alliance Series Modems USER MANUAL 08 05 2010 Rev A Page 179 of 197 NOTE ALX V 32 V 32 14 4 V 32 19 2 and V 34 only Default auxiliary channel setting 1 ...

Страница 184: ... XXX Alliance Series Modems USER MANUAL 08 05 2010 Rev A Page 180 of 197 Note 2 Settings for Speed Limit screens are in sym s 0 2400 1 2743 2 2800 3 3000 4 3200 5 3429 Speed Limit Data rates See PRIMARY OPTIONS ...

Страница 185: ...0049 2702 XXX Alliance Series Modems USER MANUAL 08 05 2010 Rev A Page 181 of 197 ...

Страница 186: ...n The selected profile is used as the active configuration and is also designated as the default user profile Use pushbutton 3 to change the default configuration profile Press pushbutton 3 to toggle switch between profile 0 or profile 1 as the default the effect is the same as issuing the Y command Y0 or Y1 When the configuration screen for profile 0 or profile 1 is displayed as illustrated below...

Страница 187: ...unction Doing so is likely to adversely affect the modem configuration How to Change S Register Values The S REG screen displays an S register number and the value currently stored in the displayed S register Select the desired S register number then modify its value as follows Use the arrow pushbuttons to move the LCD cursor from one digit to the next Then select DEC or INC to decrease or increas...

Страница 188: ...AL RJ 45 modular jack for connection to a dial line RX DIAL Ignore RX DIAL label RJ 45 modular jack for alternate leased line connection when an 8 pin connector is required LEASED LINE RJ 11 modular jack for 6 pin leased line connection PHONE RJ 11 modular jack for connection to a telephone handset optional These connectors are illustrated in Chapter 1 which explains how to install the ALX and how...

Страница 189: ...0049 2702 XXX Alliance Series Modems USER MANUAL 08 05 2010 Rev A Page 185 of 197 Figure D 1 Connector pin assignments ...

Страница 190: ... 8 Carrier detect CD CF 109 CD Modem 9 Testing voltage 10V P Modem 10 Testing voltage 10V P Modem 15 Transmit clock TC DB 114 Modem 17 Receive clock RC DD 115 Modem 18 Analog loopback ALB control 1 CN DTE 20 Data terminal ready DTR CD 108 2 TR DTE 21 Remote digital loopback RDL control 1 CN DTE 22 Ring indicator RI CE 125 R Modem 24 External transmit clock XTC DA 113 DTE 25 Test mode indicator TM ...

Страница 191: ...08 05 2010 Rev A Page 187 of 197 RJ 45 to DB 25 Cable Adapters Three types of cable adapters are available to convert the RJ 45 pinout to a DB 25 pinout if necessary These adapters are illustrated in Figure D 2 Figure D 2 RJ 45 to DB 25 adapter types ...

Страница 192: ...A1 control to MI MIC control Strap the modem for use in a DC rack enclosure or Change the function of TIA EIA interface pin 25 If you need to reset a jumper switch refer to the following page to determine the jumper that should be switched where it is located and how it should be set The jumpers are numbered on the circuit board for example JP2 is jumper 2 To access the jumpers unscrew the four sc...

Страница 193: ...rame and signal ground connected Frame and signal ground not connected JP2 JP3 JP4 Set to same position AC power DC power for Telco 48 VDC battery JP5 JP6 Set to same position A A1 control MI MIC control JP7 Pin 25 used for analog loopback input Pin 25 used as test mode indicator output JP8 JP9 JP10 JP11 Reserved Do not change these jumpers Factory settings are shown in bold face For each jumper p...

Страница 194: ... are identical to the software and circuitry in their stand alone counterparts which are described in the main body of this instruction manual Except for the absence of the plastic outer shell and interface connectors the only difference between the low profile units and the stand alone units are in the front panel design The low profile front panel does not have a liquid crystal display LCD or co...

Страница 195: ...at indicate the operational status of the modem DIAG diagnostic port The DIAG indicator is on when the modem s diagnostic port is actively connected For example the DIAG indicator will be on when the modem is being polled for diagnostic information through the diagnostic port This indicator can be configured to instead show DTR status see Low Profile DIAG LED Function in Chapter 2 ON LINE The ON L...

Страница 196: ...rofile version supports special commands that make it possible to control the modem from a dumb terminal or computer DTE These commands are described in Chapter 3 See the section titled Diagnostic Port Control An alternate method for controlling low profile ALX modems in a rack enclosure is to control them from an ALX V 32M ALX V 32 14 4M ALX V 32 19 2M or V 34M modem equipped with a front panel L...

Страница 197: ...ork Standardized jacks are used for these connections This equipment should not be used on party lines or lines that require coin payment Change or modifications to this device not expressly approved by the manufacturer could void the user s authority to operate it If this device is malfunctioning it may also be causing harm to the telephone network and should be disconnected until the source of t...

Страница 198: ...th one or more of the following measures Re orient the receiving antenna Relocate this device away from the radio or television receiver Plug this device into a different power outlet so that it and the receiver are on different AC branch circuits If necessary consult an experienced radio television technician for additional suggestions USE in CANADA This digital apparatus does not exceed the Clas...

Страница 199: ...s may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas CAUTION Users should not attempt to make such connec...

Страница 200: ...CHASE PRICE OF THE PRODUCT FOR ANY LOSS OF USE LOSS OF TIME INCONVENIENCE COMMERCIAL LOSS LOST PROFITS OR SAVINGS OR OTHER INCIDENTAL SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS RAYMAR PRODUCT TO THE FULL EXTENT SUCH MAY BE DISCLAIMED BY LAW WITHOUT LIMITING THE FOREGOING RAYMAR SHALL HAVE NO LIABILITY FOR ANY DATA STORED IN OR USED WITH THE PRODUCT INCLUDING T...

Страница 201: ...del number the serial number a description of the problem being encountered and the cause of the problem if known Please note that prior to authorizing a return a product support specialist may call to verify that the product is properly installed or may ask you to perform tests to insure that the product has actually failed The product must be properly packed and returned to Raymar Telenetics 732...

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