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MINI-MODEM (56 KBPS DATA/FAX MODEM)

5.3 Digital Loopback Test/V.54 Loop 2 (Remote/Automatic)

In this test, your modem must be on-line with another
modem set up to respond to a request for Digital
Loopback (note that some modems may not support
Remote Loopback or may have this feature disabled).
The test procedure is as follows:

1. Go into Terminal mode. Type AT and hit ENTER;

you should get an OK message.

2. Dial the remote modem by entering the Dial

command and the phone number, to establish
on-line mode. Note: The &T6 command must
be set on the remote modem to run this test.

3. Type the Escape Sequence (+++), which brings

your modem into Command mode, while still
maintaining the connection with the remote
modem.

4. Type AT&T6 and hit ENTER. The local modem

responds to this command by transmitting an
unscrambled marking signal, which causes the
remote modem to place itself in Digital Loopback
mode. Then the local modem exits Command
mode and enters pseudo-on-line mode.

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Содержание MD1620A

Страница 1: ...Order toll free in the U S 24 hours 7 A M Monday to midnight Friday 877 877 BBOX FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mail order Black Box Corporat...

Страница 2: ...ipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take what...

Страница 3: ...e ba o lavabo s tano mojado o cerca de una alberca etc 6 El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante 7 El aparato el ctrico debe ser...

Страница 4: ...i n a los contactos y recept culos donde salen del aparato 14 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa d...

Страница 5: ...trademarks mentioned in this manual are the sole property of their owners NAMING CONVENTIONS USED IN THIS MANUAL In the software you received the Mini Modem is called the Multi Modem or the MT5600ADX...

Страница 6: ...This Manual 19 3 Installation and Connection 21 3 1 Before You Install 21 3 1 1 Safety Warnings 21 3 1 2 Computer 22 3 1 3 Serial Cable 22 3 1 4 Telephone Line 23 3 1 5 Communications Software 24 3 1...

Страница 7: ...2 3 7 5 The Modem Cannot Connect When Answering 54 3 7 6 Slow File Transfer 54 3 7 7 Losing Data 55 3 7 8 Garbage Characters on the Monitor 56 4 AT Commands S Registers and Result Codes 58 4 1 AT Comm...

Страница 8: ...6 1 Calling Black Box 135 6 2 About the Internet 135 Appendix A Tone Dial Frequencies 136 Appendix B Regulatory Information 138 B 1 Single User Software License Agreement 138 B 2 FCC Regulations for...

Страница 9: ...ps Data Rates fax 14 400 9600 7200 4800 2400 300 bps Data Format Serial binary asynchronous Compatibility K56flex ITU V 42bis V 42 Enhanced V 34 AT T V32terbo ITU V 32bis V 32 V 22bis V 22 Bell 212A a...

Страница 10: ...x over dial up lines Intelligent Features Automatic or manual dialing automatic or manual answer microprocessor controlled EIA extended Automode adaptive line probing automatic symbol rate and carrier...

Страница 11: ...7200 bps V 27ter DPSK at 4800 and 2400 bps V 21CH2 FSK at 300 bps Half Duplex Carrier Frequencies Data 1800 Hz V 32 V 32bis V32terbo Enhanced V 34 K56flex Carrier Frequencies 2400 1200 bps V 22bis V...

Страница 12: ...iginate 1300 Hz Mark 2100 Hz Space for Transmit Answer 1300 Hz Mark 2100 Hz Space for Receive Originate 390 Hz Mark 450 Hz Space for Receive Answer Carrier Frequencies Fax V 21 CH2 Transmit Originate...

Страница 13: ...s for Send Data Receive Data Carrier Detect various speed indicators Off Hook Terminal Ready Error Correction Fax Controls Power ON OFF Switch Speaker 2 inch cone with software or command controlled v...

Страница 14: ...13 MINI MODEM 56 KBPS DATA FAX MODEM Regulatory Compliance UL CUL CSA FCC Size 5 6 H x 4 25 W x 1 15 D 14 8 x 10 8 x 2 9 cm Weight 0 5 lb 1 1 kg...

Страница 15: ...ransmission speed to 53 kbps K56flex technology is able to propel data downstream from the Internet to your computer at speeds of up to 56 kbps because data is digitally encoded instead of modulated U...

Страница 16: ...s connections The Mini Modem is a desktop fax modem for compatible IBM Personal Computers It provides ial up asynchronous communication capability with other personal computers terminals on line compu...

Страница 17: ...data transmission speeds up to 56 kbps while maintaining compatibility with lower speed modems NOTE The K56flex standard asymmetrically transfers data client downloads at speeds up to 56 kbps client u...

Страница 18: ...1 and MNP 5 2 to 1 data compression MNP10 and MNP10EC enhanced Cellular Performance error correction H 324 compliant videophone ready Automatic disabling of compression when transferring already comp...

Страница 19: ...cation standards allowing it to communicate with other fax modems as well as with fax machines Sends and receives faxes from your computer at 14 400 bps 9600 bps 7200 bps 4800 bps 2400 bps or 300 bps...

Страница 20: ...ifications lists relevant technical specifications for the Mini Modem Chapter 2 Introduction and Description begins with a short product introduction and description followed by a guide which you are...

Страница 21: ...he Mini Modem Chapter 5 Testing Your Modem covers the modem s built in test features These are Power on Self Test Local Analog Loopback Digital Loopback and Remote Digital Loopback Tests We have inclu...

Страница 22: ...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...

Страница 23: ...the Mini Modem to your computer Call Black Box at 724 746 5500 for ordering information The cable must have a DB25 male connector at the modem end For IBM and compatible computers the other end may h...

Страница 24: ...ble that comes with the Mini Modem If you do not have a telephone jack near your computer you should install an extension before proceeding In North America telephone extension kits and accessories ar...

Страница 25: ...one numbers so they can be recalled with the stroke of a key or the click of a mouse The software must be set up or configured before you can use it You must have Microsoft Windows 3 1 or later to run...

Страница 26: ...that you place it where you can see the indicators on the front panel 3 2 Installing the Modem Figure 3 2 Mini Modem Connections To install your Mini Modem 1 Attach the Mini Modem to dial up phone li...

Страница 27: ...ach your Mini Modem to your PC or terminal with an RS 232 or V 24 cable see Figure 3 1 and Figure 3 2 Be sure to tighten the mounting screws on the DB connectors 3 Connect your telephone set to phone...

Страница 28: ...ws 95 or 98 1 Click the Start button point to Settings and click Control Panel 2 Double click the Modems icon If no modem is currently installed the Install New Modem wizard appears If a modem is alre...

Страница 29: ...modems appears 6 Select MultiTech Systems from the Manufacturers list box then select MultiModem MT5600ZDX from the Models list box 7 Click Next Windows installs and configures the modem 8 Click Fini...

Страница 30: ...a HyperTerminal connection it will select your new modem and ask you to confirm the selection Installing Your Modem in MS DOS 5 0 or Higher If you have MS DOS 5 0 or higher a program called MSD EXE Mi...

Страница 31: ...M Figure 3 3 Mini Modem Connections 3 3 LED Indicators The Mini Modem has ten LED indicators to report status such as verifying proper installation and line activity such as monitoring the status of a...

Страница 32: ...ter of the Mini Modem The transmitting terminal should hold this line in the marking state when no data is being transmitted including intervals between characters or words The TRANSMIT TD LED indicat...

Страница 33: ...is contingent upon server capabilities and line conditions 28 V 34 This LED is lit when the modem is connected in V 34 mode 14 V 32bis This LED is lit when the modem is connected in V 32bis mode Note...

Страница 34: ...odem to be able to communicate The state of the TR LED matches that of the DTR circuit on pin 20 of the RS 232 V 24 interface EC Error Correction This LED is lit when the modem is set for V 42 error c...

Страница 35: ...ur Mini Modem You control your Mini Modem by issuing AT commands and setting S Registers Right now your Mini Modem is set up for the most typical user application that is as a traditional modem set to...

Страница 36: ...modem or run the risk of mistakenly keying in incorrect information If you use modern communications software such as Web browsers and Internet dialers you may never have to use AT commands although...

Страница 37: ...the modems have settled on a common connection a connect message on your computer s video is displayed To hang up a call enter ATH0 CR Your modem will return on hook just as if you had returned a phon...

Страница 38: ...e to operate optimally with the software it is using NOTE Refer to your software manual for further information on your communications software Figure 3 6 Mini Modem Initialization Setup Other softwar...

Страница 39: ...l mode in your communications package 2 To determine if your computer and modem are communicating properly enter AT CR At this point your video monitor should display OK If the characters you typed do...

Страница 40: ...0 B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 C0 D0 G2 J0 K3 Q5 R1 S0 T4 X0 S00 002 S02 043 S06 002 S07 030 S08 002 S09 006 S10 014 S11 095 S12 050 S18 000 S36 007 S37 000 S40 105 S41 003 S46 138 S95 000 STORED P...

Страница 41: ...ring your connection the modem might be defective However it is more likely that the source of your problem lies elsewhere Problems you might encounter include None of the LEDs light when the modem is...

Страница 42: ...lly turn on the modem by turning on a power strip If the power supply is plugged into a power strip make sure the power strip is plugged in and its power switch is on Make sure the power supply module...

Страница 43: ...ged in and powered on Make sure you are issuing the modem commands from the data communications software either manually in terminal mode or automatically once you have configured the software You can...

Страница 44: ...may still be in the communications software Make sure you have done whatever is necessary in your software to make a port connection Not all communications programs connect to the COM port automatica...

Страница 45: ...ings in your software to the physical connection If the modem is on the cable is plugged into the correct port the communications software is configured correctly and you still don t get an OK the fau...

Страница 46: ...one of the unused IRQs If you find an address conflict change the address of one of the conflicting devices To change a port address or IRQ in Windows 3 1x double click the Control Panel icon then th...

Страница 47: ...conflict with the other device or select the port the conflicting device is on and change it instead If you need to open your computer to change switches or jumpers on the conflicting device refer to...

Страница 48: ...e telephone line a wrong dial tone a busy signal a wrong number no modem at the other end a faulty modem computer or software at the other end incompatibility between modems You can narrow the list of...

Страница 49: ...ult The solution may be to modify modem parameters via AT command strings There are other configurations you can modify as well Note that you can return to the modem s default configurating by enterin...

Страница 50: ...onnect at 33600 bps V 34 AT MS 11 Connect at 14400 bps V 32bis AT MS 10 Connect at 9600 bps V 32 AT MS 9 Connect at 2400 bps V 22bis AT MS 2 Connect at 1200 bps V 22 AT MS 1 Connect at 1200 bps no pro...

Страница 51: ...nd a company phone system PBX with an internal dial tone that sounds different from the normal dial tone In that case the modem may not recognize the dial tone and may treat it as an error Check your...

Страница 52: ...dows Terminal select Settings Modem Commands To change it in Windows 95 or 98 HyperTerminal select Call Connect from the menu bar click Dialing Properties and type 9 in the local and long distance box...

Страница 53: ...tion when someone tries to call you If you have call waiting disable it before each call In most telephone areas you can disable call waiting by preceding the telephone number with 70 check with your...

Страница 54: ...p another phone If this is a frequent problem disconnect the extension phones before using the modem or install another phone line especially for the modem Check for loose connections between the mode...

Страница 55: ...running under Windows 3 1 and have a 16550AFN UART you must replace the Windows serial driver COMM DRV to take full advantage of the UART s speed If you are using a slow transfer protocol such as Xmo...

Страница 56: ...7 7 LOSING DATA If you are using data compression and a high speed serial port set the serial port baud rate to four times the data rate Your UART may not be reliable at serial port speeds over 9600 b...

Страница 57: ...different word lengths stop bits or parities If you have connected at 8 N 1 try changing to 7 E 1 or vice versa using your communications software You may be experiencing line noise Enable error corr...

Страница 58: ...57 MINI MODEM 56 KBPS DATA FAX MODEM Try entering the V View Parameters command making a screen print of the diagnostics listing and checking for parameters that may be unacceptable...

Страница 59: ...odem They enable you to establish read and modify parameters in addition to dialing The following is a summary and of the AT commands recognized by the Mini Modem Command AT Attention Code Values n a...

Страница 60: ...nswer Values n a Description Answer an incoming call before the final ring Command A Repeat Last Command Values n a Description Repeat the last command string Do not precede this command with AT Do no...

Страница 61: ...may up to 40 characters Dial string modifiers 0 9 DTMF digits 0 to 9 The star digit tone dialing only The gate digit tone dialing only A D A B C and D DTMF digits Country specific some countries may p...

Страница 62: ...0 X1 X3 or X4 must be selected S Dial a telephone number previously stored using the Zn x command see Zn x command for further information The range of n is 0 3 Pause during dialing for time set in re...

Страница 63: ...d the modem returns a NO ANSWER code Wait for credit card dialing tone before continuing with the dial string wait contingent on S7 setting Toggles data calling tone enable disable applicable to curre...

Страница 64: ...he computer E1 Do echo keyboard characters to the computer Command Hn On Hook Off Hook Control Values n 0 or 1 Default 0 Description H0 Go on hook to hang up H1 Go off hook to make the phone line busy...

Страница 65: ...entifier string in either binary or ASCII format I5 Display country code e g NA Ver 1 I6 Display modem data pump model and internal code version I7 Display the DAA code resulting from MCU interrogatio...

Страница 66: ...volume Command Mn Monitor Speaker Mode Values n 0 1 2 or 3 Default 1 Description M0 Speaker always off M1 Speaker on until carrier signal detected M2 Speaker always on when modem is off hook M3 Speak...

Страница 67: ...parameter to 1 Command On Return Online to Data Mode Values 0 or 1 Default None Description O0 Enters on line data mode without a retrain Handling is determined by the Call Establishment task Typicall...

Страница 68: ...r S register number n varies Default None Description Set value of register Sr to value of n where n is entered in decimal format Command Sn Read Write Register Value Values n v or Default None Descri...

Страница 69: ...ontents of the last register accessed to 40 ATS 20 sets the contents of the last register accessed to 20 Command Vn Terse Verbose Result Code Format Values n 0 or 1 Default 1 Description V0 Displays R...

Страница 70: ...DTE speed Other responses are disabled W3 Upon connection the modem reports DCE speed only e g CONNECT 28800 Other responses are disabled NOTE This command controls the format of CONNECT messages The...

Страница 71: ...TE If the modem is in facsimile mode e g FCLASS 1 the only message sent to indicate a connection is CONNECT without a speed indication Command Yn Long Space Disconnect Values n 0 Default 0 Description...

Страница 72: ...n hook Command Zn Modem Reset Values n 0 or 1 Default None Description Z0 Reset modem to profile saved by the last W command profile 0 Z1 Reset and restore stored profile 1 Command Cn Data Carrier Det...

Страница 73: ...t 2 Description D0 Modem ignores the true status of the DTR signal and responds as if it is always on D1 When DTR drops while in online data mode the modem enters command mode issues an OK and remains...

Страница 74: ...d Gn V 22bis Guard Tone Control Values n 0 1 or 2 Default 0 Description G0 Disable guard tone G1 Enable 550 Hz guard tone G2 Enable 1800 Hz guard tone Command Jn Telephone Jack Control Values n 0 or 1...

Страница 75: ...K6 Enable both RTS CTS and XON XOFF flow control Default for fax and voice modes Command Ln Leased Line Operation Values n 0 Defaults None Description L0 NA NOTE This command requests leased line or d...

Страница 76: ...N0 selects normal buffered mode but the command sequence N0 M0 selects direct mode This is because the N0 command is analogous to the Q6 command Command Qn Asynchronous Communications Mode Values n 0...

Страница 77: ...inactive after carrier tone is lost Command Tn Test Commands Values n 0 1 3 4 5 6 7 or 8 Default None Description T0 Abort Stop any test in progress T1 Starts local analog loop test T2 Returns Error T...

Страница 78: ...d user profiles and the first four stored phone numbers The stored profiles and phone numbers are not displayed if the NVRAM is not installed or is not operational as detected by the NVRAM test during...

Страница 79: ...S41 003 S46 138 S95 000 STORED PROFILE 1 B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 C0 D0 G2 J0 K3 Q5 R1 S0 T4 X0 S00 002 S02 043 S06 002 S07 030 S08 002 S09 006 S10 014 S11 095 S12 050 S18 000 S36 007 S37 000 S...

Страница 80: ...tocol LAPM Data Compression V42Bis Line Quality 030 Highest SPX RX state 068 Highest SPX TX state 067 Command Wn Store Current Configuration Values n 0 or 1 Default None Description W0 Store active mo...

Страница 81: ...ne Description Stores telephone dial string x in memory location n Dial the stored number using the command ATDS n Command En Monitor Line Quality and Auto Retrain or Fallback Fallforward Values n 0 1...

Страница 82: ...direct indication DAA dependent of the receive level at the MDP not at the telephone line connector e g 009 9dBm 043 043 dBm etc Command Q Line Signal Quality Values none Default none Description Q Re...

Страница 83: ...and stores eight serial numbers in hex format for serial Plug and Play For example AT 7 8 hex numbers same 8 hex numbers Command 8 Plug and Play Vendor ID and Product Number Values none Default none D...

Страница 84: ...Compression C1 Enables MNP 5 data Compression negotiation C2 Enables V 42 bis data Compression negotiation C3 Enables both V 42 bis and MNP 5 data Compression negotiation Command An Select Maximum Bl...

Страница 85: ...es n B1 B9 Default B3 Description B3 Break length in 100 ms units non error correction mode In non error correction mode the modem will transmit a break signal to the remote modem with a length in mul...

Страница 86: ...break is passed Command Kn Set Break Control Values n 0 1 2 3 4 or 5 Default 5 Description Controls the response of the modem to a break received from the DTE or the remote modem or the B command acco...

Страница 87: ...with transmitted data The second case is where the modem is in the on line command state waiting for AT commands during data connection and the B command is received in order to send a break to the re...

Страница 88: ...connection K0 Clear data buffers and send break to the DTE K1 Same as K0 K2 Send break to DTE immediately K3 Same as K2 K4 Send break to DTE in sequence with transmitted data K5 Same as K4 Command Nn...

Страница 89: ...0 or 1 Default n a Description V0 Disables Single Line Connect Message V1 Enables Single Line Connect Message where the format is CONNECT DTE speed Modulation Protocol Compression Line speed NOTE Conn...

Страница 90: ...ction rates using one to four subparameters client modem or five subparameters server modem The command format is MS mod automode min_rate max_rate x_law rb_signalling cr The modem can send a string o...

Страница 91: ...2K 11 V 34 33 6K 31 2K 28 8K 26 4K 24K 19 2K 16 8K 14 4K 12K 9 6K 7 2K 4 8K 2 4K 56 K56Flex 56K 54K 52K 50K 48K 46K 44K 42K 40K 38K 32K downstream speeds 64 Bell 103 300 69 Bell 212 1200 auto mode Ena...

Страница 92: ...eter For example MS 0 Enter disables auto mode and keeps all other settings at their current value Command SDR n Enable Disable Distinctive Ring Values SDR n Default 0 Description SDR 0 Disables Disti...

Страница 93: ...and Mn This command is included only for compatibility and performs no function Command Hn This command is included only for compatibility and performs no function Command Kn MNP 10 MNP Extended Servi...

Страница 94: ...detection phase Command Qn This command is included only for compatibility and performs no function Command SEC n Enable Disable Values SDR n Default n a Description SEC 0 Disables MNP 10 EC SEC 1 Ena...

Страница 95: ...View Numbers in Blacklist Values n a Description This command requests the modem to return a list of blacklisted numbers to the DTE Permanently forbidden numbers as defined by country requirements wi...

Страница 96: ...with each The modem will return a list of delayed telephone numbers as defined in the B command If no numbers are delayed only the OK result code is issued The format of the response is shown by the e...

Страница 97: ...G Value pair format The expected pairs are data time caller code phone number and name CID 2 Enables Caller ID with unformatted presentation The modem will present the entire packet information exclud...

Страница 98: ...Puts the modem in command mode and optionally issues a command while remaining online Type and up to ten command characters then press ENTER Command Pn Make Break Dial Ratio Values 0 3 Description P0...

Страница 99: ...gister To assign a value to an S Register enter the letter S followed by the S Register number and an equals sign To read an S Register value enter the letter S followed by the S Register number and a...

Страница 100: ...aracter Values greater than 127 disable the escape sequence S3 decimal 0 127 13 M Sets ASCII code for the carriage return character S4 decimal 0 127 10 J Sets ASCII code for the line feed character Re...

Страница 101: ...ime the modem waits for a carrier signal before aborting a call Also sets the wait for silence time for the dial modifier Reg Unit Range Default Description S8 seconds 0 255 2 Sets the length of a pau...

Страница 102: ...signal must be lost before the modem disconnects S11 1 ms 50 255 95 Sets spacing and duration of dialing tones Reg Unit Range Default Description S12 1 50 sec 50 255 50 sec Defines the maximum period...

Страница 103: ...options Bit 0 This bit is ignored Bit 1 Command Echo En 0 Disabled E0 1 Enabled E1 Default Bit 2 Quiet Mode Qn 0 Send Result Codes Q0 Default 1 Do not send Result Codes Q1 Bit 3 Result Codes Vn 0 Num...

Страница 104: ...of the test in progress Default 0 Bit 0 Local Analog Loopback 0 Disabled Default 1 Enabled T1 Bit 1 Not Used Bit 2 Local Digital Loopback 0 Disabled Default 1 Enabled T3 Bit 3 Remote Digital Loopback...

Страница 105: ...the length of time in seconds that the modem conducts a test commanded by Tn before returning to the Reg Reg Unit Range Default Description commandmode Ifthis registervalueiszero the test will not aut...

Страница 106: ...ise 0 J0 Default 1 J1 Bit 1 Reserved Bit 2 CTS behavior Rn 0 CTS tracks R0 1 CTS always on R1 Default Bit 3 4 DTR behavior Dn 0 D0 selected 1 D1 selected 0 D2 selected Default 1 D3 selected Bit 5 RLSD...

Страница 107: ...Bit 2 3 Speaker control Mn 0 Disabled M0 1 Off on Carrier M1 2 Always on M2 3 On during Handshake M3 Bit 4 6 Limit result Codes Xn 0 X0 1 X1 2 X2 3 X3 Bit 7 Reserved S23 General Bit Mapped Options Sta...

Страница 108: ...00 bps 7 38400 bps or higher Default Bit 4 5 Assumed DTE parity 0 even 1 not used 2 odd 3 none default Bit 6 7 Guard Tone Gn 0 none G0 Default 1 none G1 2 1800 Hz G2 S24 seconds 0 255 0 Sets the lengt...

Страница 109: ...cription S25 seconds 0 255 5 Sets the length of time in seconds that the modem ignores DTR for taking the action specified by Dn Its units are one hundredths of a second S27 Bit Mapped Options Status...

Страница 110: ...Description 0 Internal Clock X0 Default 1 External Clock X1 2 Slave Clock X2 Bit 6 CCITT Bell Mode Select Bn 0 CCITT B0 1 Bell Mode B1 Default Bit 7 Reserved S28 Bit Mapped Options Status Default 0 B...

Страница 111: ...Unit Range Default Description S29 1 minute 0 255 70ms Sets the length of time in units of 10 ms that the modem will go on hook when it encounters a S30 1 minute 0 255 0 S30 specifies the length of t...

Страница 112: ...fault 1 Single Line Connect Message V1 Bit 1 Auto Line Speed Detection Nn 0 Disabled N0 1 enabled N1 Default Bit 2 3 Error Correction Progress Messages Wn 0 DTE speed only W0 Default 1 Full Reporting...

Страница 113: ...of the XOFF character S36 Bit Mapped Options Status indicates the status of command options LAPM Failure Control Default 7 Bits 0 2 This option indicates what should happen upon a LAPM failure These...

Страница 114: ...n is attempted if it fails a Direct mode connection is established 6 Reserved 7 An MNP connection is attempted if it fails a Normal mode connection is established Default Bits 3 7 Reserved S37 Bit Map...

Страница 115: ...nded instead of the Nn and S37 x commands but Nn and S37 x commands are supported for compatibility with existing communications software 0 Attempt automode connection If N0 is active connection is at...

Страница 116: ...H command to disconnect or ON to OFF transition of DTR if the modem is programmed to follow the signal and the disconnect operation Applicable to error correction connection only If S38 is set to a va...

Страница 117: ...tions Status Indicates the status of command options Default 3 Bit 0 2 Status of Command Options 0 No Flow Control 3 RTS CTS K3 Default 4 XON OFF K4 5 Transparent XON K5 6 Both Methods K6 Bit 3 7 Rese...

Страница 118: ...ters A0 1 128 characters A1 Default 2 192 characters A2 3 256 characters A3 S41 General Bit Mapped Options Status indictates the status of command options Default 195 C3h Bits 0 1 Compression selectio...

Страница 119: ...fall forward enabled E2 Default Bit 3 Reserved Bits 4 5 Reserved Bit 7 Reserved Reg Unit Range Default Description S46 decimal 136 or 138 138 Controls selection of compression S46 136 means execute er...

Страница 120: ...e remote modem s capabilities are known this process can be bypassed S48 0 means to disable negotiation bypass the detection negotiation phases and proceed to LAPM S48 7 means to disable negotiation d...

Страница 121: ...ions Table 4 3 V 42 Negotiation Action S48 7 S48 128 S36 0 2 LAPM or Hangup Do not use S36 1 3 LAPM or Async Async S36 4 6 LAPM MNP or Hangup MNP or Hangup S36 5 7 LAPM MNP or Async MNP or Async S82 S...

Страница 122: ...ent that contributes to a NO CARRIER message The cause codes are S86 0 Normal disconnect no error occurred S86 4 Loss of carrier S86 5 V 42 negotiation failed to detect an error correction modem at th...

Страница 123: ...o 15 dBm In some countries the transmit level may not be changed and there are checks to prevent transmit attenuation level change 10 dBm is the transmit level default S92 dBm 0 to 15 dB 10 Sets the f...

Страница 124: ...n setting Also refer to Table 4 4 on the next page Default 0 Bit 0 CONNECT result code indicates DCE speed instead of DTE speed Bit 1 Append ARQ to CONNECT XXXX result code in error correction mode XX...

Страница 125: ...displayed on your PC s monitor Table 4 4 Result Codes Terse Verbose Description 0 OK Command executed 1 CONNECT Modem connected to line 2 RING Ring signal detected 3 NO CARRIER Carrier signal lost or...

Страница 126: ...00 2400 bps Data Carrier Detected 48 CARRIER 4800 4800 bps Data Carrier Detected 49 CARRIER 7200 7200 bps Data Carrier Detected 50 CARRIER 9600 9600 bps Data Carrier Detected 51 CARRIER 12000 12000 bp...

Страница 127: ...r Detected 153 CARRIER 38000 38000 bps Data Carrier Detected 154 CARRIER 40000 40000 bps Data Carrier Detected 155 CARRIER 42000 42000 bps Data Carrier Detected 156 CARRIER 44000 44000 bps Data Carrie...

Страница 128: ...at 48000 bps 174 CONNECT 50000 Connected at 50000 bps 175 CONNECT 52000 Connected at 52000 bps 176 CONNECT 54000 Connected at 54000 bps 177 CONNECT 56000 Connected at 56000 bps 20 CONNECT 230400 Conn...

Страница 129: ...s sent to your modem s transmitter converted into analog form looped back to the receiver converted into digital form and then received back at your monitor for verification No connection to the phone...

Страница 130: ...esponses 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 4 For a more complete test...

Страница 131: ...er modem then back to the first modem See Figure 4 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 Se...

Страница 132: ...e remote modem 4 Type AT T3 from the local PC and hit ENTER Once you receive an OK message from your modem if responses are enabled the local modem is placed in Digital Loopback mode 5 Data is typed f...

Страница 133: ...dem into Command mode The modem should respond with an OK message If you wish to stay on line with the remote modem for normal data transmission type ATO0 and hit ENTER If you wish to terminate the ca...

Страница 134: ...ould get an OK message 2 Dial the remote modem by entering the Dial command and the phone number to establish on line mode Note The T6 command must be set on the remote modem to run this test 3 Type t...

Страница 135: ...reconverted into analog and then looped through its transmitter back to the local modem Your modem passes this test if the data entered from the local keyboard is the same as the data received on you...

Страница 136: ...lling Black Box If you have any questions about the operation of this unit please call Black Box Technical Support at 724 746 5500 6 2 About the Internet You can also e mail your questions to this add...

Страница 137: ...This method is referred to as Dual Tone Multi Frequency DTMF dialing The four horizontal rows on a touch tone keypad use the four low frequencies 697 770 852 941 Hz while the three vertical columns u...

Страница 138: ...column In another example the digit 9 would be dialed with the tone frequencies of 852 Hz and 1477 Hz The extended DTMF characters A B C D are the high end frequencies 1633 Hz defined on some telepho...

Страница 139: ...r otherwise use it on more than one computer or computer terminal at the same time Customer must treat the software like any copyrighted material The software may not be assigned sublicensed translate...

Страница 140: ...cations company The equipment must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended...

Страница 141: ...riate electric inspection authority or electrician as appropriate The Load Number LN assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which...

Страница 142: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 2001 Black Box Corporation All rights reserved...

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