General DataComm 060A027-001 Installation & Operation Manual Download

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AT Command Set Operation

AT Command Details

060R122-000

SpectraComm Dual V.34 Modem

4-29

Issue 15

Installation and Operation

Table 4-5

\V2 Connect Message Descriptions

NUMERIC (V0) MEANING

VERBAL RESPONSE (V1)

Command was successful

Link established

CONNECT

Incoming ring detected

RING

Link dropped

NO CARRIER

Command failed

ERROR

Link established at 1200

CONNECT 1200

Dial tone not present

NO DIALTONE

Line busy

BUSY

Remote not answering

NO ANSWER

Link established at 2400

CONNECT 2400

Reliable DTE Link at 300

CONNECT REL

Reliable DTE Link at 1200

CONNECT 1200/REL

Reliable DTE Link at 2400

CONNECT 2400/REL

Reliable DTE Link at 4800

CONNECT 4800/REL

Reliable DTE Link at 7200

CONNECT 7200/REL

Reliable DTE Link at 9600

CONNECT 9600/REL

Reliable DTE Link at 12000

CONNECT 12000/REL

Reliable DTE Link at 14400

CONNECT 14400/REL

Reliable DTE Link at 16800

CONNECT 16800/REL

Reliable DTE Link at 19200

CONNECT 19200/REL

Reliable DTE Link at 21600

CONNECT 21600/REL

Reliable DTE Link at 24000

CONNECT 24000/REL

Reliable DTE Link at 26400

CONNECT 26400/REL

Reliable DTE Link at 28800

CONNECT 28800/REL

Reliable DTE Link at 38400

CONNECT 38400/REL

Reliable DTE Link at 57600

CONNECT 57600/REL

Reliable DTE Link at 76800

CONNECT 76800/REL

Reliable DTE Link at 115200

CONNECT 115200/REL

Reliable DTE Link at 128000

CONNECT 128000/REL

Summary of Contents for 060A027-001

Page 1: ...The Best Connections in the Business General DataComm 6SHFWUD RPP V 34 Dual Modem Installation Operation Manual 060R122 000 Issue 15 May 2012...

Page 2: ...on 6 0 0 In addition to the publications listed above always read Release Notes supplied with your products Issue Number Date Description of Change 1 4 Initial Release and Updates 5 November 1999 Revi...

Page 3: ...ist 1 8 Technical Specifications 1 10 Chapter 2 Installation Unpacking the Modem 2 1 Installation Guidelines 2 1 Setting Option Jumpers 2 2 Installing the Dual V 34 Modem 2 4 Making Cable Connections...

Page 4: ...3 32 Direct Dialing in Synchronous Mode 3 32 Normal Synchronous Mode 3 32 V 13 Synchronous Mode 3 33 Synchronous Compression Mode 3 33 Clock Selection 3 34 Switched Network Operation 3 35 Telephone Li...

Page 5: ...25 bis Communication Commands 5 7 ITU T V 25 bis Command Procedures 5 9 108 2 Mode Operating Procedures 5 9 108 1 Mode Operating Procedures 5 11 V 25 bis 108 2 Mode Interface Specifications 5 12 Inter...

Page 6: ...iv SpectraComm Dual V 34 Modem 060R122 000 Installation and Operation Issue 15 Table of Contents...

Page 7: ...y not be current Contact General DataComm if you require updated information for this or other General DataComm products General DataComm Inc 6 Rubber Avenue Naugatuck Connecticut USA 06770 Tel 1 203...

Page 8: ...etwork interface Never install telephone wiring during an electrical storm Antistatic Precautions This product may contain static sensitive devices that are easily damaged by electrostatic discharge E...

Page 9: ...If the SpectraComm Dual V 34 causes harm to the telephone network the telephone company will notify you in advance that temporary discontinuance of service may be required If advance notice is not pra...

Page 10: ...ment Technical Requirements document s The Department does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissib...

Page 11: ...de t l communications peut demander l utilisateur de d brancher un appareil la suite de r parations ou de modifications effectu es par l utilisateur ou cause de mauvais fonctionnement Pour sa propre p...

Page 12: ...6 Rubber Avenue Naugatuck CT 06770 U S A Declare under our sole responsibility that the SpectraComm Dual V 34 modem is in conformity with the following standards or other normative documents EN 55022...

Page 13: ...ct Support Repair GDC provides regular and warranty repair services through Factory Direct Support Repair at its U S headquarters in Naugatuck Connecticut This customer support organization repairs an...

Page 14: ...Preface Support Services and Training xii SpectraComm Dual V 34 Modem 060R122 000 Installation and Operation Issue 15...

Page 15: ...n a dual shelf configuration allowing for one SCM card The SpectraComm 2000 Shelf holds two cards and can be rack mounted or wall mounted and supports central and remote site installation For non NEBS...

Page 16: ...te determination in V 34 and V 32 bis modes with fallforward fallback V 42 MNP error control V 42 bis MNP 5 asynchronous data compression Supports MNP 10 for cellular phones Synchronous data compressi...

Page 17: ...s are often used to communicate with main frame or mini computers and usually do not support disk management or file transfers A full featured data communications software package does allow file tran...

Page 18: ...enclosure system refer to its manual as listed on the inside cover of this manual Figure 1 1 Shelf Enclosure Configurations GPS 11E POWER SUPPLY POWER ON FAIL POWER ON OFF 0 GPS 11E POWER SUPPLY POWE...

Page 19: ...ial connections to the network In a RADIUS protected system dial in users will be authenticated through user names passwords and challenged prompts coming from the modem and through the SCM to a RADIU...

Page 20: ...er s client software Each connection sets up a secure tunnel that passes AES encrypted data to the authorized user When a user terminates a management session the Secure Access Modem requests a connec...

Page 21: ...m products prod_homo shtml Country codes listed as 999 default indicate no dialing parameters Modems with SAM or AES Encryption are for USA or Canada only Code 001 Table 1 1 Supported Country Codes Co...

Page 22: ...2 Includes Online and SteadFast Security 060M027 002 SC Dual V 34 Modem in the RA 1000 AC Standalone Enclosure two mod to mod cables 830 027 414 Cable Splitter Adapter 010P165 002 060A027 001 SC Dual...

Page 23: ...slot dual RJ45 Zone 1 connector panels 010M070 001 MS 2 Model 10 48 VDC with redundant power supplies and term block kit two 8 slot dual RJ45 Zone 1 connector panels 010M210 002 MS 2 Model 11 48 VDC...

Page 24: ...T V 34 or V 32 7200 bps ITU T V 34 or V 32 bis 4800 bps ITU T V 34 or V 32 2400 bps ITU T V 34 or V 22 bis 1200 bps ITU T V 22 or Bell 212A 300 bps ITU T V 21 or Bell 212 Asynchronous only Data Forma...

Page 25: ...0 Hz 0 5 Hz ITU T V 21 Originate Mode Answer Mode Mark 1850 12 Hz Space 1650 12 Hz Mark 1180 Hz 12 Hz Space 980 Hz 12 Hz Bell 103 Originate Mode Answer Mode Mark 2225 Hz 12 Hz Space 2025 Hz 12 Hz Mark...

Page 26: ...ECT delay Power Reqmts Power Consumption 6 watts dc maximum each DC Voltage Typical 5V 12V 12V 5V 5 at 0 85A 12V 5 at 0 04A 12V 5 at 0 015A Load Number 1 0 Dimensions Printed circuit board Height 21 m...

Page 27: ...eed environmental specifications Table 1 3 Do not install the unit directly above equipment that generates a large amount of heat such as power supplies If the Zone 1 connector panel of the shelf has...

Page 28: ...ommunicate on a switched network telephone line The Default position for X3 and X4 is for switched network communication When the modem is installed in the SC 5000 high density shelf positioning the j...

Page 29: ...PER LOCATION SHELF BACKPLANE TYPES J32 J48 J31 J47 J30 J46 J29 J45 J28 J44 J27 J43 J26 J42 J25 J41 J24 J40 J23 J39 J22 J38 J21 J37 J20 J36 J19 J35 J18 J34 J17 J33 J14 J12 J11 J16 J15 J13 J10 J9 J8 J7...

Page 30: ...then use the tab to remove card Making Cable Connections Figure 2 2 shows the cabling of a typical network installation when the Dual V 34 is housed in SpectraComm shelves and enclosures Table 2 1 li...

Page 31: ...NE STANDARD BACKPLANE ZONE 1 F G G F G F D DTE INTFC 2 HEX STANDOFF BACK PANEL BACKPLANE CONNECTOR ATTACHING BAND SCREW one for each cable hood 50 PIN CABLE SC 5000 SHELF SC 2000 SHELF J32 J48 J31 J47...

Page 32: ...ved Clock 20 CD 108 2 DTR To DCE Data Terminal Ready 22 CE 125 RI From DCE Ring Indicator 24 DA 113 TC To DCE Transmit Clock DTE Source Table 2 3 Interface Connector Cable Splitter to Backplane Pin No...

Page 33: ...d for each range of data rates using an example calculation Resistance and Cable Length A DTE cable for use with the modem must have total resistance of 20 ohms or less To calculate a cable s resistan...

Page 34: ...If you are using a terminal as your DTE proceed to the next step If you are using a computer as your DTE then run your communications software and configure it for terminal emulation If you are using...

Page 35: ...us DTE ITU T V 25 bis commands sent to the modem from a terminal PC or other DTE Simple Network Management Protocol SNMP commands sent to the modem through a SpectraComm Manager card Terminal or Telne...

Page 36: ...ct Green When ON the modem has turned on DTE interface pin 8 or DCD is on indicating it is receiving data TR ON indicates the DTE has turned On DTE interface pin 20 or DTR is On indicating it is ready...

Page 37: ...that follows your number can contain up to 30 digits P follows D command tell the modem to pulse dial use dial digits 0 9 T follows D command tell the modem to tone dial use dial digits 0 9 and symbol...

Page 38: ...ter where AT AT command prefix instructs modem to pay attention to the characters that follow D Dial command instructs modem to dial P Instructs modem to use pulse dialing 9 Instructs modem to dial 9...

Page 39: ...be enabled to provide automatic response to incoming calls 1 When the value stored in S Register 0 is greater than zero auto answer is enabled 2 The modem counts ring signals on the line and display a...

Page 40: ...modes Any character sent from the DTE to the modem at the originate end during dialing or the handshake sequence aborts the call Loss of carrier An abort timer set for 1 to 30 seconds via the S7 x com...

Page 41: ...e modem handshake without user intervention The Online Security sequence can then proceed with the cell password prompt It is important to note that if callback is also desired the modem should be con...

Page 42: ...ity available under special conditions This use of cell passwords provides a lesser degree of security but allows access if the SCM fails or all RADIUS servers fail Refer to the SCM Installation Opera...

Page 43: ...Cell 1 C S0 ATDT phone number S6 P1 Online password F1 2 Z1 callback phone number Not Mandatory Online Callback with password in Cell 1 C S0 ATDT phone number S2 P1 Online password F1 2 Z1 callback p...

Page 44: ...ion Key P0 SteadFast password S11 N4 X1 Encryption Key P0 SteadFast password S11 N4 SAM Authentication SAM only X0 SAM ID X1 SAM PIN S16 Z9 phone number N4 Q3 SAM and SteadFast X0 SAM ID X1 SAM PIN P0...

Page 45: ...a phone number cell of the answering modem by means of the Zn nnn command Up to ten phone numbers can be stored in memory cells 0 through 9 using the Z command Example To call a modem at 555 1212 and...

Page 46: ...is described below Online Security with Callback requires that an online cell password be configured with a callback extension A callback extension causes the answering modem to disconnect and then ca...

Page 47: ...s number cell ENTER 5 The caller s screen displays NO CARRIER indicates the disconnect RING indicates the incoming call CONNECT followed by the appropriate connect message indicates the modems are in...

Page 48: ...indicates that the modem is capable of RADIUS Security If other Product codes are displayed such as 288 your modem will not support RADIUS Enabling RADIUS in the Modem To enable RADIUS at the answeri...

Page 49: ...ption Key using the following AT command Encryption key must be entered in both modems exactly with no errors spaces corrections or backspaces AT X1 Encryption Key where the key consists of up to 32 A...

Page 50: ...option are already capable of secure access controller authentication For modems already installed in a customer s network contact your GDC service representative to arrange for an upgrade To configur...

Page 51: ...iled connection before the modem redials the server Values are 0 20 second delay 1 to 30 the delay in minutes 7 Enable SAM mode operation and make it non volatile by typing AT S16 W or AT S17 W where...

Page 52: ...the SAM modem phone number and the public encryption key to the client application Once received the call is dropped 3 The client modem then dials the SAM modem 4 With a successful exchange of message...

Page 53: ...10 minute increments default is 1 i e 10 minutes When remote configuration is disabled R1 the SAM modem will only answer incoming calls if it has a valid key Otherwise the modem will disconnect immed...

Page 54: ...Server sends the client the SAM phone number and its public key over the secure tunnel AS then disconnects the call Second Call 3 Client calls the SAM and performs a public key exchange over a secure...

Page 55: ...command mode and synchronous operation in data mode Depending on its option settings you can set the modem to enter command mode and wait for the next AT command by one of three methods Using AT D1 co...

Page 56: ...rmine the asynchronous data rate and parity settings of the local DTE You can type either AT or at but mixed cases such as At or aT will not give predictable results Multiple commands in a string may...

Page 57: ...as fixed profile 0 Remote Configuration Using the AT Commands Remote Configuration allows you to use the local modem to connect to a remote modem and view or change the remote modem s user configurat...

Page 58: ...his point 4 Once you have made your changes terminate the session according to the following options To terminate the session without saving or using the new profile enter X0 To terminate the session...

Page 59: ...ction between local and remote modem 3 Send configuration changes to the remote modem 4 Terminate the session according to the following options To save changes made during the session terminate the s...

Page 60: ...s Each telephone line connection whether switched network or private line between two modems in data mode begins with a handshaking sequence During that sequence the modems determine the VF telephone...

Page 61: ...able 3 4 list the command combinations that set the various mode characteristics MNP Operation Overview When enabled for MNP operation the modem can be configured for compatibility with MNP Levels 2 5...

Page 62: ...l 5 MNP Level 5 provides error correction and data compression for improved throughput Level 5 error correction provides synchronous framing with adaptive frame lengths The sending modem performs data...

Page 63: ...rror Correcting Modes below The AT command Cn determines what mode the modem will fall back to and how it will handle data it receives before its mode is established The handshake sequence that occurs...

Page 64: ...Mode In direct V 14 mode N1 there is no error correction data compression or data buffering The modem s DTE data rate and VF line speed must be set to the same value If for example the link between th...

Page 65: ...le with asynchronous operation described below and two that are only for use with synchronous data compression Software Flow Control Software flow control uses the XON Control Q and the XOFF Control S...

Page 66: ...gth of time permitted to switch DTE before the call is disconnected Direct Dialing in Synchronous Mode Direct dialing in synchronous data mode can be accomplished in either of two ways DTR dialing sel...

Page 67: ...ble for use with synchronous compression Both require that the modem be configured for internal timing see below Flow control for synchronous compression can be accomplished by Clock Stopping Q5 in wh...

Page 68: ...k derived by the local modem from the data it is receiving from the remote modem also called wrap timing The preferred clock source varies for different computer systems Consult your computer s manual...

Page 69: ...doing so degrades throughput If you have call waiting you should disable it while you are on the line to prevent loss of through put In some areas for example you can disable call waiting by dialing...

Page 70: ...ree times or press the AL button Private Line Configuration In any private line connection first designate one modem as the originate modem O0 and the other as the answer modem O1 Next configure both...

Page 71: ...e changes are complete an O command can be used to go back on line or an H command can be issued to go to idle From idle either the talk data switch or O can be used to initiate a new connection Once...

Page 72: ...plays the Shelf Inventory screen Proceed to the Shelf Inventory Screen paragraphs below Telnet Connection 1 When you establish a Telnet connection to the SCM LAN port the SCM Telnet Login screen is th...

Page 73: ...unit you intend to work with then press Enter If the selected unit is a Dual V 34 modem the unit displays the Line Selection screen shown below i 4 In the Line Selection screen Line 1 designates the...

Page 74: ...eat last command A Escape sequence to place a unit configured for private line operation into command mode Selecting AT Session through the terminal interface automatically forces the unit into the AT...

Page 75: ...message To Exit AT Mode and Return to Main Menu use the AT Command Type AT commands to the unit just as you would from the DTE 4 When you are done entering commands type AT and press Enter The display...

Page 76: ...for inputting AT commands 7 Configure the modem as required by typing AT commands just as you would from the DTE When complete check the AT option settings again to be sure that O is set correctly 8...

Page 77: ...ces one minute without transitions in the Receive Data On DBU occurs when a modem that normally operates on a dedicated line connection has initiated a switched network connection due to problems with...

Page 78: ...in bps at which the receiver connected to the remote modem Call Length Sec up to 65535 seconds During a current call displays duration at the time the screen was accessed Retrain Count number of times...

Page 79: ...erface signals OFF or ON To dismiss the DTE Status screen and return to the Main Menu press Enter Screen data reflects conditions at the moment you accessed the screen To update the display dismiss th...

Page 80: ...Operation Modem Main Menu 3 46 SpectraComm Dual V 34 Modem 060R122 000 Installation and Operation Issue 15...

Page 81: ...ast command entered This is the only command that can be issued without the AT prefix The modem acts on the command line only The AT prefix space carriage return and line feed characters are not consi...

Page 82: ...odem is being used interactively on a terminal or with a terminal emulation package issue AT and then press Enter 5 If the V 34 is connected properly it will respond to the command by displaying the b...

Page 83: ...es the fallforward fallback feature Only functions when the modem is optioned for synchronous data mode or for asynchronous with speed buffering and only for V 34 V 32 and V 32 bis modes An Auto relia...

Page 84: ...es data compression in both directions C2 In V 42 bis or synchronous enables data compression in the transmitter path In MNP 5 enables data compression in both directions C3 In V 42 bis or synchronous...

Page 85: ...rects the dialer to redial the attempted dial string up to n times if the modem does not achieve data mode Ln Directs the dialer to dial phone cell n if the modem fails to achieve data mode with the c...

Page 86: ...wire private line operation F3 Selects synchronous two wire private line operation Fn x Password cell qualifier Determines which callback extensions if any can be used with the password stored in a sp...

Page 87: ...kbps maximum rate G17 33 6 kbps maximum rate DEFAULT Gn Modem to modem flow control Provides modem to modem flow control for non error corrected data links that require a constant speed DTE interface...

Page 88: ...cts V 34 auto 28 8 300 H1 selects V 34 only 28 8 2400 H2 selects V 32 bis automatic 14 4 300 H3 selects V 32 bis only 14 4 4800 H4 selects V 32 automatic 9600 300 H5 selects V 32 only 9600 4800 H6 sel...

Page 89: ...cryption is enabled country code must be 001 for USA or Canada VF Card Displays NONE Not applicable in the Dual V 34 Modem DTE Card Displays 232 Not applicable in the Dual V 34 Modem Leased Line Displ...

Page 90: ...m for private line or switched network lines L0 Switched network mode L1 2 wire private line mode Mn Operating mode Selects between asynchronous and synchronous operation in data mode See the Vn comma...

Page 91: ...el of 26 dBm M2 M10 Initial transmit power level of 10 dBm M11 M31 Initial transmit power level of 11 dBm to 31 dBm respectively J Performs MNP10 link negotiation at 1200 bps this call only See H1 com...

Page 92: ...e command may be used alone or as part of a dial string When P is used alone it makes pulse dialing the modem s default dialing method When P is used in a dial string it acts as a modifier and affects...

Page 93: ...etween modem and DTE Q2 Enables the modem to flow control the DTE via CTS Q3 Operates the same as the Q2 option and also allows the DTE to flow control the modem via RTS as a ready to receive signal Q...

Page 94: ...23 32 0 kbps R24 48 0 kbps R25 56 0 kbps R26 64 0 kbps R27 72 0 kbps R28 96 0 kbps R29 112 0 kbps Rn Remote configuration write access Controls remote configuration write access This command is not af...

Page 95: ...efault is 13 ASCII CR Line Feed character S4 Holds the ASCII equivalent 0 127 of the Line Feed character User defined value not saved after powerup reset The default is 10 lf Backspace character S5 Ho...

Page 96: ...The default is 5 seconds After the whole second timer expires the register is then used to debounce the DTR signal as above The same number stored in the register is applied to both the whole second a...

Page 97: ...to follow carrier detect S3 Selects DSR forced On in all modes Sn Password operation Selects what type of password security the modem will enforce Refer to Security Overview for detailed information...

Page 98: ...nitiate a remote digital loopback T6 Instructs the modem to transmit the in band request to establish a remote digital loopback with the far modem T7 Instructs the modem to transmit the in band reques...

Page 99: ...established Refer to Vn Connect Messages as noted below for message details V0 Options the modem to send the standard GDC Connect message upon reaching fata mode plus V 42 messages after the link nego...

Page 100: ...nals are monitored and reported to the local DTE Country configuration definitions can restrict the storage function X0 Forces blind dialing disables all CPM and only the CONNECT message is sent for a...

Page 101: ...hile on line Y0 Disables long space disconnect Y1 Enables long space disconnect Yn Power up user profile Determines which of the stored user configuration profiles Wn will be activated at modem power...

Page 102: ...e the DTE s speed to match the displayed connect speed When the modem is optioned for speed buffering N0 or an error correcting protocol N2 through N5 the Tn command alone selects the DTE speed The Hn...

Page 103: ...Disable B0 B Auto Dial Restoral Disable B0 Disable B0 Disable B0 Disable B0 B Character length B2 B2 B2 B2 See the detailed description for AT command B C Pre link data buffer C2 C2 C2 C2 See the det...

Page 104: ...reliable N3 Auto reliable N3 Auto reliable N3 O Answer mode Ans mode if ringing O 0 Ans mode if ringing O 0 Ans mode if ringing O 0 Ans mode if ringing O 0 P Private line handshake mode V 34 only P0...

Page 105: ...to DTR 0 05 sec S25 5 0 05 sec S25 5 0 05 sec S25 5 0 05 sec S25 5 S25 Delay to DTR V0 or V1 with sync data mode 5 sec S25 5 5 sec S25 5 5 sec S25 5 5 sec S25 5 S26 RTS CTS delay 0 sec S26 0 0 sec S2...

Page 106: ...ock source Internal X0 Internal X0 Internal X0 Internal X0 X Call Progress Monitor Ext results full CPM X4 Ext results full CPM X4 Ext results full CPM X4 Ext results full CPM X4 Y Power up user confi...

Page 107: ...NECT 2 Incoming ring detected RING 24 Exchange cannot dial number UN OBTAINABLE NUMBER 3 Link dropped NO CARRIER 6 Dial tone not present NO DIALTONE 8 Remote not answering NO ANSWER 7 Line busy BUSY 2...

Page 108: ...LASS 5 Note When AES Encryption is in effect V0 and V1 connect messages will display AES at the end of the protocol string Table 4 4 V1 Connect Message Descriptions NUMERIC V0 MEANING VERBAL RESPONSE...

Page 109: ...e DTE Link at 2400 CONNECT 2400 REL 33 Reliable DTE Link at 4800 CONNECT 4800 REL 34 Reliable DTE Link at 7200 CONNECT 7200 REL 35 Reliable DTE Link at 9600 CONNECT 9600 REL 36 Reliable DTE Link at 12...

Page 110: ...AT Command Set Operation AT Command Details 4 30 SpectraComm Dual V 34 Modem 060R122 000 Installation and Operation Issue 15...

Page 111: ...After configuring the modem by using the AT command set use the Vn command to switch to the V 25 bis command set Table 5 1 summarizes the V 25 bis compatible command set Table 5 1 V 25 bis Command Set...

Page 112: ...and set can include operating parameters such as data rate handshake mode and synchronous timing source as well as storage of phone numbers in the modem s memory cells In order for the V 25 bis comman...

Page 113: ...ne was not detected dial tone time out occurred CFI DF Call failure indication telephone number delayed list which uses the 10 memory cells is full Numbers which are redialed continuously without maki...

Page 114: ...r by invoking the CRS command in 108 2 mode or by turning On circuit 108 1 in 108 1 mode 108 1 dialing uses only the number stored in memory cell 0 To store a number type PRN n1 n2 LF where n1 is the...

Page 115: ...ed common to the two commands 2 For 1200 bps V 22 operation select PRS HM 7 PRS HM 6 is an auto mode so setting the DTE to 1200 bps PRS DR 3 will not force the connection to 1200 bps 3 When the modem...

Page 116: ...bps 10 16 800 bps Note a When the modem is optioned for an external transmit clock source PTM 1 the modem should be optioned for a fixed not an automatic handshake mode e g select V 32 bis only PRS H...

Page 117: ...k supplied by the DTE type PTM 1 LF To select receiver wrap clock derived from received data type PTM 2 LF V 25 bis Communication Commands Communication commands allow you to establish and terminate d...

Page 118: ...numeric characters following T to be dialed using tones Used to select tone dialing for compatibility with the telephone system you intend to use or Causes the modem to pause a specified length of tim...

Page 119: ...er the specified number of rings 3 When communication is established your terminal displays the CNX response and data transfer can take place If communication is not established your terminal will dis...

Page 120: ...tion when DSR comes On Recognize connected data rate from the CNX message Send connect CNX message Enter data transfer mode Turn On RTS to send data Turn On CTS in response to RTS Turn Off DTR to term...

Page 121: ...nal interface circuit 108 1 4 When communication is established you may transfer data Automatic Call Answering The modem can answer calls automatically in 108 1 mode if the function has not been disab...

Page 122: ...ous or asynchronous The ITU T V 25 bis 108 2 mode recommendations describe the exchange of commands and responses between the units using both types of operation The V 34 supports command response exc...

Page 123: ...not recognize the C or A fields unless verified as shown above The modem uses the BISYNC BSC format in the byte oriented synchronous mode V3 AT command The structure of each message in this format is...

Page 124: ...ty 1 stop LF ASCII Line Feed Character 00001010 Modem Test Modes When optioned to operate in the synchronous V 25 bis mode the V 34 supports the following test modes that can be initiated from the Fro...

Page 125: ...the modem has been in data mode for approximately 30 seconds b Once a modem is in Slave RDL it ignores all requests other than AL c If an MRDL request does not get a response from the Slave modem at...

Page 126: ...he modem issues a CONNECT _ _ _ _ message at the last known DTE rate If the DTE rate and handshake rate differ the user can change the DTE speed to match the rate reported by the CONNECT message Table...

Page 127: ...flashes the TM LED while it is setting up the test then lights the TM LED while the test is running HELLO DTE INTER FACE TX LOGIC RX LOGIC TX DRIVER ANALOG RECEIVER ANALOOP Communications Line Enter t...

Page 128: ...t 300 bps Table 6 2 Analog Loopback with Self Test Step Front Panel AT Command Mode 1 To start the test press AL switch then the ST switch for the modem you are testing a or b To start the test type A...

Page 129: ...OGIC RX LOGIC TX DRIVER ANALOG RECEIVER ANALOOP PATTERN GENERATOR Communications Line If the timer S Register 18 is set to a non zero value the test terminates automatically when the timer expires 10...

Page 130: ...t type the escape sequence and after the modem is in the command mode type AT T3 enter If modem responds with an error message type AT T0 enter which resets the test mode then re enter the command 3 T...

Page 131: ...h the remote attendant that the remote modem will accept Remote Digital Loopback commands 3 To start the test type the escape sequence and after the modem is in the command mode type AT T6 enter If mo...

Page 132: ...e 6 6 Remote Digital Loopback with Self Test Data Path Note This test cannot be performed if the remote modem is configured to ignore a remote digital loopback com mand Step AT Command Mode 1 Establis...

Page 133: ...cations line This test is not operational when the modems are passing data at 300 bps or the modems are configured for error correction n2 n3 n4 n5 Table 6 6 End to End Self Test Step Front Panel AT C...

Page 134: ...OGIC RX LOGIC TX DRIVER ANALOG RECEIVER local modem PATTERN GENERATOR Communications Line If the timer S Register 18 is set to a non zero value the test terminates automatically when the timer expires...

Page 135: ...B 00001011 43 2B 00101011 CTRL L FF 12 0C 00001100 44 2C 00101100 CTRL M CR 13 0D 00001101 45 2D 00101101 CTRL N SO 14 0E 00001110 46 2E 00101110 CTRL O SI 15 0F 00001111 47 2F 00101111 CTRL P DLE 16...

Page 136: ...1101011 L 76 4C 01001100 l 108 6C 01101100 M 77 4D 01001101 m 109 6D 01101101 N 78 4E 01001110 n 110 6E 01101110 O 79 4F 01001111 o 111 6F 01101111 P 80 50 01010000 p 112 70 01110000 Q 81 51 01010001...

Page 137: ......

Page 138: ...The Best Connections in the Business...

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