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Chapter 5 - Testing the Modem

5.5

Digital Loopback Test (Local/Manual)
(Synchronous Mode)

This test must be run when you have a data connection with another
modem. To initiate the Digital Loopback Test (local/manual), DIP-Switch #9
must be in the UP position, then place DIP-Switch #16 in the opposite
position it is currently (the modem requires a state of change in Switch #16
to activate Loopback tests).  Once you receive an OK message from your
modem (if responses are enabled), the local modem is placed in Digital
Loopback mode.

To exit the Digital Loopback Test (local/manual), pull out and then reinsert
modem card into modem card cage.

Figure 5-5.  Digital Loopback Test

(local / manual) (Syncronous)

Digital  Analog        Analog

Digital

Computer or Terminal

             Computer or Terminal

   Local Modem          Remote Modem

UUUU

Summary of Contents for MT2834BR

Page 1: ...MT2834BR MT2834BLR Intelligent Data Fax Rack Mounted Modem User Guide ...

Page 2: ...ems Inc to notify any person or organization of such revisions or changes Revision Date Description A 11 15 2003 Initial release of MT2834BR MT2834BLR as a combined User Guide Trademarks of Multi Tech Systems Inc are as follows MultiExpress MultiExpressFax MultiModemII Multi Tech and the Multi Tech logo Windows is a registered trademark of Microsoft Corporation Technical Support France support mul...

Page 3: ...on 20 3 2 Serial Port Limitations 20 3 2 1 How Can You Identify Your UART Type 21 3 3 Configuring Your Software 23 3 3 1 ConfiguringSoftware for Your Modem 23 3 4 PC Initialization Strings 24 3 4 1 Changing Default Parameters 26 3 5 Macintosh Initialization 26 3 6 Configuring Software for Your Computer 27 3 6 1 Configuring Software for the Remote System 28 3 6 2 Terminal Emulation 28 3 6 3 File Tr...

Page 4: ...roduction 65 6 2 Limited Warranty 65 6 3 Tech Support 66 6 3 1 Recording Modem Information 66 6 3 2 Service 66 6 4 Upgrading the MT2834BR 67 6 4 1 Using FlashPro to Upgrade Modem Firmware 67 6 5 Safety Warnings 68 6 6 Internet 69 Chapter 7 BABT Requirements 70 7 1 Compliance with BABT Requirements 71 7 1 1 European Low Voltage Directive 72 7 1 2 Compliance with BS6305 Clause 6 2 BS6320 Clause 7 2 ...

Page 5: ...Chapter 1 Introduction ...

Page 6: ...31 2K is awaiting formal ITU approval the ITU study group 14 has agreed on the technical side of the proposal with formal approval expected at the next ITU meeting in Geneva 1 2 Features The MT2834 automatically adjusts to line conditions and the capabilities of the modem it connects to resulting in the highest possible speed the most accurate error correction and the most efficient data compressi...

Page 7: ... to Use This Manual This chapter begins with a short introduction a profile on modem features followed by a guide which you are now reading to the use of this manual This manual includes hardware installation and configuration described in Chapter 2 Chapter 3 covers communication software configuration recommended for the MT2834 Other issues covered include setting up initialization strings changi...

Page 8: ...Chapter 2 Installation ...

Page 9: ...RJ11 back plane connectors for phone line interface 2 1 2 Serial Cable You must provide a serial cable to connect each corresponding MT2834 to your computer The cable must have a DB 25 male interface into the modem rack 2 1 3 Telephone Line The MT2834 uses one RJ11 jack per corresponding modem slot to connect to the telephone lines To connect the modem to the phone lines plug one end of the RJ11 c...

Page 10: ...d to the computer must be shielded to reduce interference 4 If you are connecting your phone line directly to the modem card plug the phone line cable into the appropriate modem slot DB9 9 pin connector female at the rear of the rack and the other end into the phone company provided RJ11 or RJ11W modular phone jack To connect the modem to the phone lines using an CC1600 modem rack plug one end of ...

Page 11: ...are interchangeable among all types of modem racks There is however slight LED differences Model CC216G is a generic modem rack for any rack mount modem card The user affixes LED labels on a per slot basis depending on modem type 2 3 PC Board Controls The MT2834 is designed on a single printed circuit board This board contains sixteen DIP Switches There is a two position Out of Service OOS toggle ...

Page 12: ...llation where the call is automatically answered The factory default DIP Switch settings are based on this assumption The following is a brief description and summary of the MT2834 s DIP Switch options Switch Function Position Effect 1 DTR Forced UP DTR forced from DTR from Interface DOWN computer terminal 2 Flow Control E4 UP Hardware flow Async Dial Up Leased Line DOWN control enabled 2 SDLC BSC...

Page 13: ... Up Leased DOWN by remote device 7 RTS Normal Forced UP RTS Forced On Sync Async Dial Leased DOWN 8 Command Mode Enabled UP Command Mode Sync AsyncDial Leased DOWN Enabled 9 Local Remote LoopBack UP Remote Async Sync Dial Leased DOWN LoopBack Enabled 10 Dial Up Leased Line UP Dial Up Enabled DOWN 11 AT Multi Tech Result Codes UP Multi Tech Result Asynchronous DOWN Codes Enabled 11 Internal Externa...

Page 14: ...default setting 2 4 OOS Busy Out Toggle Switch The MT2834 contains a two position OOS switch on the front panel This switch can be used to create a busy out OOS condition for the modem i e take the modem off hook To place a modem in the Busy condition move the OOS toggle switch to the BUSY position The modem then goes off hook its OOS and OH LEDs light and incoming calls to this modem get a busy s...

Page 15: ...ut is provided by Multi Tech s Tech Support group on request 2 4 2 MI MIC Option Jumper To activate MI MIC option Mode Indicate Mode Indicate Common Interface you must first move MI MIC jumper plugs The MI command then controls this function AT MI1 enables MI MIC and AT MI0 disables MI MIC This option is for applications where the modem s dialing capability is not used and dialing is done by an ex...

Page 16: ...e of line termination provided by the phone company Most phone companies provide a terminal block with a pair of screws Some provide a conventional RJ11 type of connector If the RJ11 connector is used you can use the same cable that you use for dial up connection If the screw terminal type connector is used you may need to order the CA167 cable from Multi Tech Systems Make two DIP Switch setting c...

Page 17: ...400 bps 14 4 This LED is lit when the modem is connected at 14 400 bps Note that when both 28 8 and 14 4 LEDs light modem is in 21 600 26 400 bps mode of operation 6 2400 bps 24 This LED is lit when the modem is connected at 2400 bps 7 Off Hook OH This LED is lit when the phone line is off hook This occurs when the modem is dialing on line or answering a call The LED also flashes when the modem is...

Page 18: ...ed When ERR LED is on this indicates the modem is in an out of service OOS state When the modem is out of service it is busy to incoming calls NOTE To verify Enhanced V 34 mode is engaged 1 Type AT CR 2 Type ATL8 3 The modem s current on line condition is displayed An example of L8 listing is shown below Figure 2 2 On Line Diagnostics ...

Page 19: ...Chapter 3 Installation ...

Page 20: ...ps and the 8250A and 16450 are unreliable above 19 200 bps If the modem sends data to the UARTs above those speeds the UARTs may not be able to process the data fast enough to keep from losing some of it The 16550AFN however can safely handle data to 115 200 bps When a modem communicates with V 42bis 4 to 1 compression enabled it sends up to four times as much uncompressed data to the serial port ...

Page 21: ...maximum communications speed on the Macintosh we recommend as few concurrent activities as possible To use V 42bis compression at 19 200 bps or faster we recommend that you install a high speed serial port card Newer Macintosh computers such as the Quadra and Centris models support serial port speeds up to 115 200 bps 3 2 1 How Can You Identify Your UART Type If you have MS DOS 6 0 or later you ca...

Page 22: ...22 Chapter 3 Configuration Figure 3 1 MSD UART Identification Screen 1 Figure 3 2 MSD UART Identification Screen 2 ...

Page 23: ... the modem initialization string This is a sequence of commands the software uses to configure the modem when the communications software is loaded or when a session begins Always begin the initialization string with the ATtention command AT then follow it with the modem reset command F Issuing a reset command before other commands ensures that you are starting with a known state The rest of the c...

Page 24: ...m software It is the ASCII code for the RETURN key on most keyboards and the default code for the carriage return character in the MT2834 and most communications programs The carriage return character is defined in the MT2834 in S register S3 if you change it you must also change the carriage return character code used in your communications software If you send a command directly to the modem in ...

Page 25: ...on Figure 3 2 The MEW Modem Initialization Setup Note that the above and following set up screens are examples found in MultiExpress for Windows MEW and that other 3rd party data communication software is similar but different ...

Page 26: ...ired for hardware control The Macintosh 128 and 512 models cannot use RTS CTS flow control at all For those Macintoshes turn off the default RTS CTS hardware flow control turn on XON XOFF flow control and pacing and ignore DTR AT F X4 E5 E13 D0 M For hardware flow control use the following initialization string AT F X4 E13 D0 M Add S0 0 to both strings to disable auto answer if the MT2834BR is on ...

Page 27: ...ter not the speed the modem communicates with another modem If V 42bis data compression is enabled select a serial port baud rate four times the transmission speed of the modem to optimize data compression If the UART is fast enough set the serial port baud rate to a minimum of four times the top speed of the modem Figure 3 3 MEW Configuration Parameters Screen For an 8250 UART the most reliable s...

Page 28: ...ish will appear on your screen 3 6 2 Terminal Emulation If you are accessing the remote computer as if from an on site terminal the keyboard codes used by your computer may not match the ones used by the remote computer To be compatible with the remote computer your software must be able to substitute the appropriate codes in what is known as terminal emulation Most communications programs can emu...

Page 29: ...en Figure 3 5 MEW File Transfer Protocols Screen 3 7 When to Disable Data Compression If your serial port cannot keep up because it has an older UART you may lose data when using data compression Also the speed advantage hardware compression gives you is entirely dependent on how much the data being transmitted can be compressed If the data is already in compressed form a ZIP or a SIT file for exa...

Page 30: ...with software Note also that when you download files with compression disabled you can use a slower serial port if you have an older UART 3 7 1 Disabling Error Correction By default the MT2834 is set to auto reliable mode In this mode the MT2834 determines during the handshake whether the other modem is using V 42 error correction If it is the MT2834 then switches itself to reliable mode and enabl...

Page 31: ...Chapter 4 Modem Commands ...

Page 32: ...ape Codes COMMAND Return VALUES n a DEFAULT n a DESCRIPTION Pressing the RETURN key executes most commands COMMAND A VALUES n a DEFAULT n a DESCRIPTION Answer call even if no ring present COMMAND VALUES n a DEFAULT n a DESCRIPTION This symbol placed in dialing string enables the modem to detect AT T s call card tones to access user s calling card to originate an on line connection COMMAND A VALUES...

Page 33: ...o 16800 to 14400 to 9600 to 4800 bps A3 selects initial handshake at 2400 to 1200 to 300 bps COMMAND Bn VALUES n 0 or 1 DEFAULT B0 DESCRIPTION B0 selects V 21 for 300 bps operation B1 selects for 300 bps operation not used on International Models COMMAND Bn VALUES n 0 or 1 DEFAULT B0 DESCRIPTION B0 selects normal transmit buffer size B1 selects reduced transmit buffer size COMMAND BSn VALUES n 0 o...

Page 34: ...p to 60 digits or T P R comma and characters COMMAND DsNd VALUES s phone and d 0 thru 9 DEFAULT n a DESCRIPTION Store telephone number To store enter phone number s followed by N then Directory Number d COMMAND Dn VALUES n 0 thru 3 DEFAULT D2 DESCRIPTION D0 means DTR is ignored D1 means modem returns to command mode D2 lets modem react to DTR normally D3 resets the modem to default parameters COMM...

Page 35: ...elects V 42 Reliable Mode E3 selects no modem initiated flow control E4 selects CTS modem initiated flow control E5 selects Xon Xoff modem initiated flow control E6 selects Xon Xoff not passed through E7 selects Xon Xoff passed through E8 selects Enq Ack pacing off E9 selects Enq Ack pacing on E10 selects Normal Mode flow control off E11 selects Normal Mode flow control on E12 selects Pacing off E...

Page 36: ... in nonvolatile memory when F is issued COMMAND Fn VALUES n 0 or 1 DEFAULT F1 DESCRIPTION F0 means do not fall back to normal connect if CR received F1 means fall back to normal connect if CR received COMMAND FCn VALUES n 0 or 1 DEFAULT FC1 DESCRIPTION FC0 means no transmit of 5 second 2100Hz signal FC1 transmits 5 second 2100Hz signal COMMAND Gn VALUES n 0 1 or 2 DEFAULT G0 DESCRIPTION G0 turns o...

Page 37: ... monitor The response to the query reveals that your modem is a BR 28 8K FAX and Class Two capable device COMMAND L VALUES 5 6 7 8 9 10 and 11 DEFAULT Read Only Command DESCRIPTION Lists all stored telephone numbers in memory L5 lists all current operating parameters L6 lists all current S Register values L7 lists additional parameters L8 lists current on line diagnostics L9 displays Signal Streng...

Page 38: ...ON Dial stored telephone number d do not include the letter D in this command COMMAND NdNe VALUES d 0 thru 9 e any other number 0 thru 9 DEFAULT n a DESCRIPTION Number Linking If first number dialed is busy another stored number may be automatically dialed For example if stored number d is dialed and is busy stored number e is then dialed COMMAND O VALUES n a DEFAULT n a DESCRIPTION Exit Command M...

Page 39: ... modes COMMAND Rn VALUES n 0 1 or 2 DEFAULT R1 DESCRIPTION R0 lets Clear to Send act normally R1 forces Clear to Send on R2 drops for 1 second on disconnect COMMAND Rn VALUES n 0 or 1 DEFAULT R0 DESCRIPTION R0 selects disconnect after 12 retransmits R1 selects do not disconnect after 12 retransmits COMMAND RFn VALUES n 0 or 1 DEFAULT RF1 DESCRIPTION RF0 selects CTS follows RTS RF1 selects CTS to a...

Page 40: ...19200 bps at serial port SB38400 selects 38400 bps at serial port SB57600 selects 57600 bps at serial port SB115200 selects 115200 bps at serial port COMMAND SPn VALUES n 0 or 1 DEFAULT SP0 DESCRIPTION SP0 disables UUCP spoofing SP1enables UUCP spoofing COMMAND SFn VALUES n 0 or 1 DEFAULT SF0 DESCRIPTION SF0 selects DSR follows CD SF1 selects DSR independent COMMAND Sn VALUES n 0 1 or 2 DEFAULT S1...

Page 41: ...g Loop Answer Mode U2 places modem in Remote Digital Loopback test mode U3 places modem in Local Digital Loopback Test Mode COMMAND Vn VALUES n 0 or 1 DEFAULT V1 DESCRIPTION V0 means Result Codes sent as digits terse response V1 means Result Codes sent as words verbose response COMMAND W VALUES n a DEFAULT n a DESCRIPTION Wait for new dial tone COMMAND Wn VALUES n 0 or 1 DEFAULT W1 DESCRIPTION W0 ...

Page 42: ... XON level returns X1 selects multiple XOFF characters after buffer level is full COMMAND Yn VALUES n 0 or 1 DEFAULT Y0 DESCRIPTION Y0 disables sending or responding to long space break Y1 enables sending or responding to long space breaks COMMAND Z VALUES n a DEFAULT n a DESCRIPTION All configuration parameters are reset to default values COMMAND Comma VALUES n a DEFAULT n a DESCRIPTION Causes pa...

Page 43: ...nter VALUES 0 1 2 DEFAULT 0 DESCRIPTION Caller ID Reporting the Call Traffic Window displays the phone number and name of the caller if the caller s phone line supports Caller ID The call must be answered after the second ring to receive the information This feature requires a modem hardware upgrade Caller Id enabled phone lines and firmware version greater than 8 07a or 2 07a The firmware is disa...

Page 44: ...e same memory location The preceding the phone number enables direct entry when the caller uses the correct password without the callback modem having to return the call The entry at the end of the phone number represents an extension added to the main phone number The Nxx is the memory location of the callback phone number and password COMMAND Pn VALUES n 0 1 or 2 DEFAULT P0 DESCRIPTION Parity of...

Page 45: ...scape code When calling a Remote Configuration equipped modem you enter the proper Remote Escape code to enable entering your Set up Password After entering it you can then execute AT commands as if you were connected locally If you set S Register S13 to zero Remote Configuration is disabled 4 1 3 Remote Configuration Procedures The procedures for using the Remote Configuration features are the sa...

Page 46: ...ITECH DESCRIPTION Login Password is any keyboard characters x upper lower case sensitive minimum 6 and maximum 10 characters The default Login Password is MULTI TECH COMMAND Syyyyyyyyyy VALUES n a DEFAULT SMODEMSETUP DESCRIPTION Set up Password is any keyboard characters y upper lower case sensitive minimum 6 and maximum 10 characters The default Set up Password is MODEMSETUP 4 1 4 V 25bis Command...

Page 47: ...VALUES n a DEFAULT n a DESCRIPTION Dials phone number dd where dd can be up to 20 characters 0 through 9 P T and Phone number is checked against the Delayed and Forbidden Number lists before dialed COMMAND CRIdd nn VALUES n a DEFAULT n a DESCRIPTION Dials dd same as CRN Command and ignores nn identification string COMMAND DIC or CIC VALUES n a DEFAULT n a DESCRIPTION The disregard or connect to in...

Page 48: ...en hit RETURN To verify that the S Register value was entered correctly enter for example ATS8 and hit RETURN You should receive a response of the assigned value given to that S Register S0 Number of Rings Until Modem Answers Unit 1 ring Range 0 255 Default 1 Description Sets the number of rings before the modem answers S1 Rings Which Have Occurred Unit 1 ring Range 0 255 Default 0 Description Cou...

Page 49: ...pressed before executing a dial command S7 Time for Carrier Abort Timer Unit 1 second Range 1 255 1 45 Default 45 Description Defines the Abort Timer lack of carrier delay time S8 Pause Time for Comma Unit 1 second Range 0 255 4 255 Default 2 4 Description Sets the length of the pause caused by a comma inserted in a dialing commarnational and DOC units S9 Carrier Detect Response Time Unit 100 mSec...

Page 50: ...Character Unit ASCII Character Range 0 127 Default 37 sign Description Defines the remote configuration escape character S16 Callback Attempts Unit 1 Attempt Range 1 255 Default 4 Description S16 defines the number of attempts allowed after initial passwords have been exchanged between modems S17 Changing Break Time Unit 10 mSec Range 0 2 5 sec Default 250 Description S17 defines the break time sp...

Page 51: ...es the amount of idle time that can elapse between AT commands after the SETUP password has been entered S30 Inactivity Timer Unit 1 minute Range 0 255 Default 0 Description Inactivity timer used to disconnect the modem S32 Time Elapse for Escape Sequence Unit 1 second Range 0 255 Default 20 Description Sets the duration in which modem waits for a CR to be entered during escape sequence execution ...

Page 52: ... which speed modem connects within Enhanced V 34 mode scope e g S48 21 means maximum connect speed is 21 6K This register is when line conditions will not support higher Enhanced V 34 speeds e g 33 6K 31 2K 28K 26 4K 24K The modem default is a value of 0 which indicates a connection attempt of 33 6K 4 3 Result Codes The MT2834BR Command mode provides you with several responses or Result Codes that...

Page 53: ...CONNECT 24000 26 CONNECT 26400 28 CONNECT 28800 31 CONNECT 31200 33 CONNECT 33600 With MNP error correction on RELIABLE or R is added to these result codes With LAP M error correction on LAP M or L is added to these result codes With data compression on COMPRESSED or C is added Note these Extended Result Codes are displayed when your modem is set up to do so with an X1 X2 X3 or X4 command Table 4 ...

Page 54: ...IAL TONE 7 BUSY 8 NO ANSWER 10 CONNECT 2400 11 CONNECT 4800 12 CONNECT 9600 13 CONNECT 14400 19 CONNECT 19200 21 CONNECT 21600 24 CONNECT 24000 26 CONNECT 26400 28 CONNECT 28800 31 CONNECT 31200 33 CONNECT 33600 Error Correction Data Compressed modifiers are not displayed with Standard AT Result Codes ...

Page 55: ...ster values in its nonvolatile memory The command AT W0 or AT W causes the modem to store its current parameters in its nonvolatile RAM The command also sets the modem upon power up or when it is reset with an ATZ command the modem reads all its configuration and S Register parameters from RAM and not from the factory settings in ROM note you may recall factory installed defaults by entering AT F8...

Page 56: ...Chapter 5 Modem Testing ...

Page 57: ... software set the desired baud rate 2 Type ATU0 or ATU and hit ENTER This places your modem in Analog Loopback mode in the Originate mode The modem is now out of the Command mode and in a pseudo On Line mode 3 Once you receive a connect message if responses are enabled enter data from your keyboard For this test typing multiple upper case U characters is a good way to send an alternating test patt...

Page 58: ...fault 5 2 Digital Loopback Test V 54 Loop 2 Local Manual The Digital Loopback Test is an on line test that loops data sent from one modem across the phone line to another modem then back to the first modem See Figure 5 2 There are two ways to put a modem into Digital Loopback mode 1 Locally or Manually described here in section 5 2 2 Remotely or Automatically see section 5 3 Note Loopback tests op...

Page 59: ...ros The data received by the local modem will enter its analog receiver be converted to digital data be reconverted into analog and then looped through its transmitter back to the remote modem Your modem passes this test if the data entered from the remote keyboard is the same as the data received on the remote monitor Figure 5 2 Digital Loopback Test local manual 6 When testing is complete you ma...

Page 60: ...nection 4 Type ATU2 and hit ENTER The local modem transmits an unscrambled marking signal The remote modem enters Digital Loopback mode The local modem exits Command mode and enters pseudo On line mode 5 Type multiple uppercase U characters to send an alternating test pattern of ones and zeros The data received by the remote modem enters the analog receiver and is converted to digital data The dat...

Page 61: ...Once you receive a connect message if responses are enabled enter data from your keyboard For this test typing multiple upper case U characters is a good way to send an alternating test pattern of ones and zeros 3 For a more complete test you should also test the modem in Answer mode To do this pull out and then reinsert modem card in rack cage Then type AT M1U1 and hit ENTER to place the modem in...

Page 62: ...e position it is currently the modem requires a state of change in Switch 16 to activate Loopback tests Once you receive an OK message from your modem if responses are enabled the local modem is placed in Digital Loopback mode To exit the Digital Loopback Test local manual pull out and then reinsert modem card into modem card cage Figure 5 5 Digital Loopback Test local manual Syncronous Digital An...

Page 63: ...ite position it is currently the modem requires a state of change in Switch 16 to activate Loopback tests Once you receive an OK message from your modem if responses are enabled the local modem is placed in Digital Loopback mode To exit the Digital Loopback Test remote automatic pull out and then reinsert modem card into modem card cage Figure 5 6 Digital Loopack Test remote automatic Syncronous D...

Page 64: ...Chapter 6 Warranty and Service ...

Page 65: ...urchase is not provided two years from date of shipment MTS MAKES NO OTHER WARRANTY EXPRESSED OR IMPLIED AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED This warranty does not apply to any products which have been damaged by lightning storms water or power surges or which have been neglected altered abused used for a purpose other than the o...

Page 66: ...______ Modem Firmware Version _____________________________ COM Port _________________________________________ FAX Software Type and Version ________________________ DataComm Software Type and Version __________________ The modem model and serial numbers are silkscreened on the bottom of your modem The software version is printed on the System CD label Type ATI1 to display the modem firmware versi...

Page 67: ...ash PROM which contains firmware code for the hardware and DSP code for the digital signal processor chips At various times Multi Tech may add enhancements and or fixes to the firmware The flash technology used in the MT2834BR lets you load these upgrades into the PROM or DSP chips through the modem s serial port 6 4 1 Using FlashPro to Upgrade Modem Firmware 1 Download FLASHPRO ZIP and a new HEX ...

Page 68: ... Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations 3 Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface 4 Use caution when installing or modifying telephone lines 5 Avoid using a telephone other than a cordless type during an electrical storm There may be a remote risk...

Page 69: ...essages from the following mailboxes on a periodic basis tsupport multitech com Technical Support mtsmktg multitech com Marketing Dept mtssales multitech com Sales Dept international multitech com International Sales Dept writers multitech com Publications Dept Multi Tech s presence includes a Web site at www multitech com ...

Page 70: ...Chapter 7 BABT Requirements ...

Page 71: ...rts marked or not so marked may produce hazardous conditions on the network Advice should be obtained from a competent engineer before such a connection is made This apparatus has been approved for the use of the following facilities Auto calling Loop disconnect and MF dialing Phone number storage and retrieval by a predetermined code Operation in the absence of proceed indication Automatic storag...

Page 72: ...e only connected to ports of the same type on other apparatus 7 1 2 Compliance with BS6305 Clause 6 2 BS6320 Clause 7 2 and BABT SITS 82 005S D a The modem is suitable for connection to the Public Switched Telephone Network PSTN provided by British Telecommunications plc or Kingston Communications Hull plc Circuit supply by British Communications Mercury Communication or Hull City Council Only dir...

Page 73: ...ratus connected to this modem and thereby connected directly or indirectly to the British Telecom public switched telephone network must be approved apparatus as defined in Section 22 of the British Telecommunications Act 1984 The REN number for this apparatus 1 7 1 3 Compliance with BS6789 Section 3 1 and Part 2 a The modem is not capable of allowing Auto Call using 999 or other PABX emergency nu...

Page 74: ...dem does not require signaling or otherwise employ the frequency range dc to 200 Hz c The modem may be connected to a point to point two wire or four wire Private Circuit d The modem does not require dc from the Private Circuit for correct operation The modem may be damaged if connected in a private circuit mode to a circuit supplying dc current the maximum permissible direct current is zero amps ...

Page 75: ...Appendices ...

Page 76: ...sing a compatible modular jack which is Part 68 compliant See installation instructions for details 3 The ringer equivalence number REN is used to determine the quantity of devices which may be connected to the telephone line Excessive REN s on the telephone line may result in the devices not ringing in response to an incoming call In most but not all areas the sum of the REN s should not exceed f...

Page 77: ... equipment from the network until the problem is resolved 7 No repairs are to be made by you Repairs are to be made only by Multi Tech Systems or its licensees Unauthorized repairs void registration and warranty 8 This equipment cannot be used on public coin service provided by the telephone company Connection to Party Line Service is subject to state tariffs Contact the state public utility commi...

Page 78: ...ected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repai...

Page 79: ...9200 21600 24000 26400 28800 31200 33600 bps synchronous at 1200 2400 4800 7200 9600 14400 16800 19200 21600 24000 26400 28800 31200 33600 bps Compatibility ITU V 42bis V 42 Pending ITU Enhanced V 34 approval V 34 ITU V 32bis V 32 V 21 V 22bis V 22 V 23 V 25bis Bell 212A and 103 113 ITU V 17 Group 3 T 4 T 30 and EIA TR 29 Class 2 V 21 V 23 Int l models only Error Correction V 42 LAP M or MNP 3 4 e...

Page 80: ... linking pulse or tone dial dial pauses call status display auto parity and data rate selection keyboard controlled modem options non volatile memory and on screen displays for modem option parameters and up to ten telephone numbers command lines of up to 60 digits each help menus Command Buffer 60 characters Modulation Trellis Coded Modulation TCM at 33600 31200 28800 26400 24000 21600 19200 1680...

Page 81: ...quencies 1270 Hz Mark 1070 Hz Space for Transmit 300 bps Originate 2225 Hz Mark 2025 Hz Space for Bell Standard Receive Originate 2225 Hz Mark 2025 Hz Space for Transmit Answer 1270 Hz Mark 1070 Hz Space for Receive Answer Carrier Frequencies 980 Hz Mark 1180 Hz Space for Transmit V 21 Originate 1650 Hz Mark 1850 Hz Space for Transmit Answer 1650 Hz Mark 1850 Hz Space for Receive Originate 980 Hz ...

Page 82: ...Cabinet Diagnostics Power on Self Test Local Analog Loop Local Digital Loop Remote Digital Loop Indicators LEDs for Transmit Data Receive Data Carrier Detect various speed indicators Off Hook Terminal Ready Ring Indicator and Out of Service Busy Controls Toggle switch for Out of Service OOS On board DIP Switches and jumpers for various modem options Operating 0 to 50 C 32 to 120 F Temperature Powe...

Page 83: ...Index ...

Page 84: ...ish Telecom 1 75 British Telecommunications pic 1 74 Buffer Length of Command Mode After On line Esca 1 53 S34 1 53 Bulletin board systems 1 25 1 32 Busy Out 1 16 C Callback Attempts 1 52 Callback Security Com mands 1 45 Callback Security Remote Configuration Com mands 1 45 Canadian Limitations Notice 1 80 Card Cage 1 11 Carrier Detect 1 36 Carrier Detect Response Time 1 51 S9 1 51 Carrier Frequen...

Page 85: ...rror Correction mode 1 32 Reliable mode 1 32 Compatibility 1 81 Compliance with BABT Requirements 1 73 CompuServe 1 32 Configuration Parameters 1 29 Configuring Software 1 29 Configuring Your Software 1 25 Connectors 1 84 Controls 1 84 CTS flow control 1 37 CTS follows RTS 1 41 CTS signal 1 28 D Data Compression 1 31 1 81 data compression enabled disabled 1 37 Data Format 1 81 Data Rates 1 81 Data...

Page 86: ...36 DTR Dropout Time 1 53 S25 1 53 DTR signal 1 28 E Enq Ack pacing 1 37 Error 1 20 Error Correction 1 32 1 81 Error correction 1 32 error correction selection 1 37 Escape Code Character 1 50 S2 1 50 Escape modes selection 1 37 European Low Voltage Direc tive 1 74 F factory default values 1 38 Fax Carrier Frequencies 1 83 Fax Modulations 1 82 FCC Regulations for Telephone Line Interconnection 1 78 ...

Page 87: ... 43 M Macintosh computer 1 23 1 28 Macintosh Initialization 1 28 maximum transmit block size selection 1 35 MNP 5 1 31 Mode of Operation 1 82 Model Numbers 1 81 Modem AT Commands 1 34 modem baud selection 1 39 modem ID 1 39 Modem Initialization Setup 1 27 Modem LED Indicators 1 19 Modulation 1 82 MSD EXE 1 23 Multi Tech command set 1 41 Multi Tech responses 1 54 Multi Tech Result Codes 1 55 N nego...

Page 88: ...ration Escape Character 1 52 S13 1 52 Remote Configuration Proce dures 1 47 Remote Digital Loopback 1 43 Remote System Configura tion 1 30 reset default values 1 44 Result Codes 1 41 1 44 1 54 Result codes 1 26 Result Codes Terse Verbose selection 1 43 retransmit 1 41 Return Character 1 50 S3 1 50 Return character 1 26 return to Command Mode after dialing 1 44 Ring Indicator 1 19 Ringer Equivalenc...

Page 89: ... 51 Tone Dialing Tone Spacing and Duration 1 52 S11 1 52 Transmission speed 1 23 1 29 transmit buffer size 1 35 Transmit Data 1 19 Transmit Level 1 83 Trellis Coded Modulation selection 1 43 U UART 1 23 UARTs 1 22 1 23 1 29 1 31 1 32 16450 1 22 1 23 1 29 16550 1 22 1 29 8250 1 22 1 23 1 29 8250A 1 22 1 23 1 29 Identifying 1 23 Upgrading the MT2834BA 1 69 Upgrading the MT2834BL 1 69 Upgrading the M...

Page 90: ...S000316 ...

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