Hayes Microcomputer Products PC Card User's Manual
Contents
1.2. Two kinds of connections can be established over a B channel e Circuit Switched e Packet Switched Circuit switched connections are ideal for voice traffic for several reasons Voice data is delay sensitive meaning that it must not be delayed and that it must be received in the order in which it was transmitted There is a call set up time that is characteristic of circuit switched connections This time lag is quite acceptable when measured against the length of a typical telephone call In a packet switched data network or PSDN data to be transmitted is broken up into individual units called packets that are then routed from sender to receiver The sender receiver can be any type of terminal printer computer or other device that supports an interface to the network DIVA T A PC Card Reference Guide 6 D Channel The primary function of the D channel is to carry common channel signaling information to manage and control circuit switched calls on B channels The D channel can also be used for packet switching or low speed telemetry when it is not involved in control signaling Message signaling takes priority over data packet switching The D channel functions at 16 Kbps for Basic Rate Interface or 64 Kbps for Primary Rate Interface The speed is dependent on the end user s interface H Channel The H channel is used for high speed user data traffic at bit rates higher than 64Kbps Examples of services which req
3. n 1 Monitors DTR signal when an on to off transition of DTR signal occurs enter the command state Return to the online state when the ATO command is issued n 2 Monitors DTR signal when an on to off transition of DTR signal occurs hang up and enters the command state default n 3 Monitors DTR signal when an on to off transition of DTR signal occurs hang up and reset n 9 Monitors DTR signal when an off to on transition of DTR signal occurs automatically dial the stored telephone number 0 DIVA T A PC Card Reference Guide 34 COM Port Configuration Commands Continued Command Description AT amp Kn Flow Control AT amp Kn This command allows you to enable and disable flow control so that data is stopped and restarted when buffer space becomes available n 0 Disables flow control n 3 Enables RTS CTS flow control default n 4 Enables XON XOFF flow control n 6 Enables both RTS CTS and XON XOFF flow control AT amp Sn Data Set Ready Data Set Ready DSR controls the behavior of the DSR output n 0 DSR always on default n DSR always on after protocol is connected ATEn Local Echo The E command enables or disables command echo on your computer If you do not see commands entered on your screen enable command echo If you see double characters disable command echo n 0 Disables local echo n 1 Enables local echo default AT MTIl n Set Turbo Mode Bit Rate Specifies the turbo bitrate value n
4. DO AT Command Result Codes ccccccccsssssssscssssssssssssssccccsscscsessees DO What is ISDN While you ve heard of ISDN there s a good chance you re unsure whether you need it or even what exactly it is Even though ISDN is globally available it s so new that understanding it may require a little investigation In simple terms ISDN is a replacement for plain old telephone service which was never designed to meet the needs of the information age ISDN uses the same wiring that currently serves homes and businesses You get ISDN service from the same companies who provide telephone service and you use it to connect telephones computers and fax machines The difference is that you get much faster much more dependable connections for voice data fax and even video all through a single line There is no other technology that comes close to delivering such communications benefits today International ISDN standards were established about 10 years ago Since then telephone companies throughout the world have raced to upgrade their equipment to ISDN standards As ISDN service availability has spread many millions of computer users have turned to ISDN and new users are coming on board even faster ISDN stands for Integrated Services Digital Network Integrated Services refers to ISDN s ability to deliver two simultaneous connections in any combination of data voice video and fax over a single line Multipl
5. T A Go to the specified page number for more information Note Static parameters are preceded by an asterisk Changes made to static parameters do not take effect until you restart your system use the AT amp Wn command to restart your system Changes to all other parameters dynamic parameters take effect immediately ATCommand ATA ATDn ATEn ATH ATIn ATO ATQn ATSn ATSn v ATSO n ATS1 Description Answer Calls Dial a Number Local Echo Hangup a Call View Product Information Return Online Quiet Result Codes Establishes S Registers n as the selected register S Register n to Value v Rings to Auto Answer View Ring Count See Page 40 40 35 41 25 25 36 25 37 41 41 DIVA T A PC Card Reference Guide 16 Alphabetical List of Supported AT Commands Continued ATCommand Description See Page ATS2 n Escape Character 36 ATS3 n Carriage Return Character 36 ATS4 n Line Feed Character 36 ATS5 n Back Space Character 37 ATSn Value of S Register n 26 ATVn Result Code Format 37 ATWn Connect Message Control 37 ATXn Extended Results Code 38 ATZn Restart Diva 47 AT Cl n ISDN Switch Type Primary 29 AT ICI1 n ISDN Switch Type Alternate 29 AT C2 n AutoSPID Storage Location 30 AT C4 n Enable Disable Primary Non 30 initializing mode AT C41 n Enable Disable Alternate Non 30 initializing mode AT C5 n Enable Disable Primary Non 31 initializing mode for second B c
6. a value from 128 000 to 512000 n 0 disables turbo Default 5 12000 DIVA T A PC Card Reference Guide 35 COM Port Configuration Commands Continued Command Description AT MT2 n Set Turbo Mode Threshold Specifies the minimum PC bitrate threshold for the activation of turbo mode n a value in the range 57 600 to 115 200 Default 115200 ATQn Quiet Result Codes This command enables or disables the sending of result codes to the DTE n 0 Enables result codes to the DTE default n 1 Disables result codes to the DTE ATS2 n Escape Character Use this command to configure the character used to escape from the data mode and return to the AT command mode n can be a value between 0 255 default is ASCII 043 translates into the character A value of 128 255 disables the escape function ATS3 n Carriage Return Character Sets the character that the AT command processor uses to detect the end of a command line in both the receive and transmit directions n can be a value between 0 127 default is ASCII 013 which translates into the carriage return character ATS4 n Line Feed Character Sets the character that the AT command processor uses to indicate the end of each status message n can be a value between 0 127 default is ASCII 010 line feed DIVA T A PC Card Reference Guide 36 COM Port Configuration Commands Continued Command Description ATSS n Back Space Character Sets the backspace character used
7. and BUSY signal detection n 4 Sends all messages n 5 Terminal screen displays the remote number along with the RING message If the remote number is not known the message UNKNOWN is displayed AT Vn Connect Message Control This command controls the format of connection messages n 0 Upon connection the DIVA T A reports the DTE speed only for example CONNECT 19200 default n 1 Upon connection the DIVA T A reports the DCE speed the protocol and the DTE speed same as ATW2 DIVA T A PC Card Reference Guide 38 Call Control Commands This section describes the Call Control commands Command Description AT A2 n AT A95 c Protocol Control Specifies the protocol you want to use for your ISDN connection n 2 V 120 rate adaption protocol n 95 PPP asynchronous to synchronous conversion n 96 Multilink PPP connection default Note e Both PPP and Multilink PPP require that a PPP communications stack be installed on your computer e Both the local terminal adapter DIVA T A and the remote device must be set to the same protocol e If your workstation is configured as a Windows for Workgroups RAS client you must configure the V 120 rate adaption protocol on the DIVA T A workstation and the remote device RAS Server ISDN adapter e Multilink PPP does not support the callback feature used by some servers for security purposes e When using Multilink PPP for incoming calls only SPAP or PAP authenticatio
8. bps Connection made at a bitrate less than or equal to 7200 bps DIVA T A PC Card Reference Guide 55 AT Command Result Codes Continued Number Code 14 20 21 23 Word Message CONNECT 12000 CONNECT 14400 CONNECT 19200 CONNECT 38400 CONNECT 57600 CONNECT 64000 CONNECT 115200 CONNECT 230400 CONNECT 512000 Description Connection made at a bitrate less than or equal to 12000 bps Connection made at a bitrate less than or equal to 14400 bps Connection made at a bitrate less than or equal to 19200 bps Connection made at a bitrate less than or equal to 38400 bps Connection made at a bitrate less than or equal to 57600 bps Connection made at a bitrate less than or equal to 64000 bps Connection made at a bitrate less than or equal to 115200 bps Connection made at a bitrate less than or equal to 230400 bps Connection made at a bitrate less than or equal to 512000 bps DIVA T A PC Card Reference Guide 56 AT Command Result Codes Continued pied er Word Message Description 57 CARRIER 57600 Connection made at a bitrate less than or equal to 57600 bps 59 CARRIER 64000 Connection made at a bitrate less than or equal to 64000 bps 60 CONNECT 128000 Connection made at a bitrate less than or equal to 128000 bps 83 PROTOCOL V 120 V 120 Rate Adaption Protocol 85 PROTOCOL PPPC PPP Protocol 86 PROTOCOL MLPPP Multilink PPP Protocol DIVA T A PC Card Reference Guide 57
9. for command line editing n can be a value between 0 32 default is ASCII 008 backspace ATSn v S Register n to Value v Use this command to set S Register n to the value v ATVn Result Code Format You can set your DIVA T A to display messages as digits or words Word responses are preferable since they are more meaningful n 0 Result codes are sent to the DIVA T A as numbers short form n 1 Result codes are sent to the DIVA T A as full words long form verbose default ATWn Connect Message Control This command controls the format of connection messages n 0 Upon connection the DIVA T A reports the DTE speed only for example CONNECT 19200 default n 1 Upon connection the DIVA T A reports the DCE speed the protocol and the DTE speed n 2 Upon connection the DIVA T A reports the DCE speed for example CONNECT 64000 DIVA T A PC Card Reference Guide 37 COM Port Configuration Commands Continued Command Description ATXn Extended Result Codes This command selects which subset of the result messages will be used by the DIVA T A to inform the DTE of the results from commands n 0 Provide basic result codes sends only OK CONNECT RING NO CARRIER ERROR and NO ANSWER n 1 Provide basic result codes and appropriate connection speed e g CONNECT 2400 CONNECT 19200 n 2 Provide basic result codes connection speed and DIALTONE detection default n 3 Provide basic result codes connection speed
10. mail trace AT VM s to restart the mail trace Starts or Displays the result of a PPP trace Starts or Displays the result of a Q931 trace Stops an LAPD trace Stops a Mail trace Stops a PPP trace Stops a Q931 trace Enter the monitor on the next reset Soft reset the unit and enter the monitor DIVA T A PC Card Reference Guide 52 Mini monitor Commands This section describes the Mini monitor commands Note These commands are not to be prefixed by AT Typing AT will exit the mini monitor and revert back to the normal software mode Your Eicon Technology Customer Services representative may ask you to use these commands Command Description Load Loading new firmware Note This command needs a terminal emulation program which supports XMODEM Dump Dumping memory using XMODEM Note This command needs a terminal emulation program which supports XMODEM Msg Display cause for entering the monitor gt F Restores all profiles to the original factory settings Reverts the powerup profile to number 0 This command has the same effect as AT gt F Warning All previous user defined settings are lost DIVA T A PC Card Reference Guide 53 ATCommand Result Codes This section describes the AT Command Result Codes also known as status messages These codes are displayed after an AT command is issued Result codes can be displayed as a word message long form English or as a number code short form numeric r
11. mode AT C5l n second B channel Specifies whether the second B channel in the ISDN primary AT C5 or alternate AT C51 ISDN settings is set to Non Initializing mode North American version only n 0 Disable Non initializing mode default n 1 Enable Non initializing mode Note These parameters are static They do not take effect until you restart your DIVA T A AT C6 n SPID Number for 1 B channel For North AT C6l n America only The SPID Service Profile Identifier as assigned by your local telephone company for your primary AT C6 n or alternate AT C61 n configuration This number is a unique ID which identifies an ISDN terminal to the local ISDN switch Note These parameters are static They do not take effect until you restart your DIVA T A AT C7 n SPID Number for 2 B channel For North AT C71l n America only The SPID Service Profile Identifier as assigned by your local telephone company for your primary AT C7 n or alternate AT C71 n configuration This number is a unique ID which identifies an ISDN terminal to the local ISDN switch Note These parameters are static They do not take effect until you restart your DIVA T A DIVA T A PC Card Reference Guide 31 ISDN Configuration Commands Continued Command Description AT N1 n ISDN Directory Number for 1 B channel AT INI1l n Your local ISDN data directory number as assigned by your local telephone company for your primary AT N1 n or alter
12. of current profile in memory as stored profile n Use when you are satisfied with your current configuration settings and want to save them to a specific stored profile n Set Powerup Profile Designates stored profile n as the powerup profile Use to load your desired stored profile the next time your DIVA T A is powered DIVA T A PC Card Reference Guide 46 Profile Commands Continued Command Description ATZn AT gt Z AT gt VC AT gt VPn AT amp V Restart DIVA T A Using Profile n Restarts your DIVA T A using stored profile n Use after changing a static parameter Restart DIVA T A Using Powerup Profile Restarts your DIVA T A using the powerup profile Use anytime you want to load the powerup profile View Current Profile Presents a screen display of the current profile settings on your DIVA T A View Stored Profile Presents a screen display of the desired stored profile where n is the number of the stored profile 0 1 2 you want to view View Current and Stored Profiles Displays the current and stored profiles as well as stored telephone numbers in your DIVA T A DIVA T A PC Card Reference Guide 47 Multilink PPP Commands This section describes the MLPPP commands Command Description AT MI1 n AT M2 n AT M3 n AT M4 n AT P5 n Local Endpoint Discriminator Class Specifies the local endpoint discriminator class See the section Endpoint Discriminator Class Address on page 50
13. relevant to ISDN The and amp characters are used to dial two numbers within the same dialing string The following modifiers can be used L Re dial last number S n Dial the number stored in the directory n n 0 9 N Establish a data connection I Establish a 56K ISDN data connection V Establish an ISDN DATA over VOICE connection Any character following this parameter is treated as an AT command entered in the command mode DIVA T A PC Card Reference Guide 40 Call Control Commands Continued Command Description ATH ATSO n ATS1 Hangup a Call To disconnect and hang up a call If the DIVA T A is currently online the connection is terminated Rings to Auto Answer Allows you to enable or disable auto answer Setting a value other than 0 instructs the DIVA T A to auto answer after n rings A value of 0 instructs the DIVA T A to disable the auto answer mode Specify a value between 0 255 default is 0 View Ring Count Use this command to display the current number of rings incoming call DIVA T A PC Card Reference Guide 41 V 120 Configuraton Commands This section describes the V 120 Configuration commands Command Description AT E0 n ATIEl n AT E2 n V 120 N201 Tx Maximum Transmit Frame Size N201 Tx Maximum Transmit Frame Size determines the maximum number of octets in an information field to be transmitted to the remote V 120 device Valid range is 1
14. 47 AT View Last Accessed S Switch 27 AT Vn Connect Message Control 38 A Re execute Previous Command 27 Load Loading New Firmware 53 Dump Dumping Memory Using 53 XMODEM DIVA T A PC Card Reference Guide 23 Alphabetical List of Supported AT Commands Continued ATCommand Msg gt F Description See Page Display Cause for Entering 53 Monitor Reset Factory Profiles 53 Escape Sequence 28 Last AT Command Result 28 Explained DIVA T A PC Card Reference Guide 24 General ATCommands This section describes General AT Commands Command Description ATIn View Product Information Displays information about your DIVA T A n 0 Displays hardware code for the DIVA T A n 1 Displays software checksum n 2 Reports OK n 3 Displays software version n 4 Displays capability string n 8 Displays Eicon Technology DIVA T A detect string ATO Return Online In the online data mode the DIVA T A is ready to send and receive data providing you are connected Normally the DIVA T A remains in this mode until your computer sends the data mode escape sequence or until the call is terminated Note This command can only be used when the DIVA T A is in the online escape mode ATSn Establishes S Register n as the Selected Register The ATSn command establishes S Register n as the last register accessed where n is the number identifying the S Register For example ATS7 establishes S7 as the last accessed reg
15. 6 260 Default 260 Note If a larger frame needs to be transmitted the DIVA T A segments it into V 120 fragments and expects the remote device to perform reassembly V 120 N201 Rx Maximum Receive Frame Size N201 Rx Maximum Receive Frame Size determines the maximum number of octets in an information field to be received from the remote V 120 device Valid range is 16 260 Default 260 V 120 Multiframe Mode The V 120 protocol supports two different transfer modes described below n E Multiframe mode is enabled default This mode provides acknowledged transfers by using Information I and acknowledgment RR RNR frames and provides error correction and recovery procedures The link verification procedure is provided by exchanging SABME and UA frames n D Unacknowledged mode is enabled This mode uses Unnumbered Information UI frames The link verification procedure is provided by exchanging XID frames The unacknowledged mode is less robust than multiframe mode Note The DIVA T A may automatically switch to the other mode if the link verification frames issued from the remote device do not match the configured mode on the local device The DIVA T A always prefers the multiframe mode DIVA T A PC Card Reference Guide 42 V120 Configuration Commands Continued Command Description AT E3 n AT E4 n AT E5 n V 120 K Window Size Applicable to the multiframe mode only K Window Size determines the maximum nu
16. DIVA VA PC Card Reference Guide Second Edition March 1998 206 179 02 DIVA T A PC Card is a trademark of Eicon Technology Corporation Microsoft Windows and Windows NT are registered trademarks of Microsoft Corporation CompuServe is a registered trademark of CompuServe Incorporated Hayes is a registered trademark of Hayes Microcomputer Products Inc Changes are periodically made to the information herein these changes will be incorporated into new editions of the publication Eicon Technology may make improvements and or changes in the products and or programs described in this publication at any time A Product Comment Form is provided at the back of this publication If the form has been removed address your comments to Eicon Technology Corporation Attn Corporate Publications 9800 Cavendish Blvd Montreal Quebec Canada H4M 2V9 Eicon Technology may use or distribute whatever information you supply in any way it believes appropriate without incurring any obligations to you Copyright 1998 Eicon Technology Corporation All rights reserved including those to reproduce this publication or parts thereof in any form without permission in writing from Eicon Technology Corporation Table of Contents What is ISDN cssiccsccsssseodsssscteasesoncoscssentacsssenesdesoantsosssnsssascscntecccsaassscesat What is EZ ISDN TOC sccsccssccsseccseccsscssccsssssssesssssscsssssssessessseeees What is AutoSPID cccs
17. Default 19200 V 110 Character Length Specifies the character length Values for n 7 or 8 Default 8 V 110 Parity Specifies the parity used for V 110 Values for n 0 none 1 even 2 odd 3 one 4 zero Default 0 V 110 Stop Bits Specifies the Stop Bits used for V 100 Values for n 1 or 2 Default 2 V 110 Flow Control Specifies the Flow Control method to be used for V 110 Values for n O none 1 receive only 2 transmit only 3 receive and transmit Default 1 receive only DIVA T A PC Card Reference Guide 45 Profile Commands This section describes the Profile commands Command Description AT amp F AT gt F AT gt FC AT amp Wn AT amp Yn Use Factory Settings in Current Profile Restores and loads all settings in the current profile with the original factory settings Previously configured ISDN commands stored telephone numbers and the rate adaption control values are retained all other settings are lost Use Factory Settings in All Profiles Restores all stored profiles and the current profile to the original factory settings Reverts the powerup profile to number 0 Use when you need to reset the card to its original factory settings Warning All previous user defined settings are lost Reset Current Profile and Telephone Numbers Resets the current profile and telephone numbers to the default factory settings Save Settings as Profile n Writes storable parameters
18. N Alternate Subaddress for second B channel Outgoing Call Type V 110 Configuration Override V 110 Stream Rate V 110 Character Length See Page 44 44 32 32 32 32 33 33 33 33 33 45 45 45 DIVA T A PC Card Reference Guide 19 Alphabetical List of Supported AT Commands Continued ATCommand _ Description AT V3 n AT V4 n AT V5 n AT MENU AT CP n AT In AT SL AT SM AT SP AT SQ AT VI AT VL AT VM AT VP AT VQ V 110 Parity V 110 Stop Bits V 110 Flow Control Activate VT100 Configuration Tool Enable Disable Compression On Demand SPID Testing North America only Stop LAPD Trace Stop Mail Trace Stop PPP Trace Stop Q 931 Trace View Initial Profile View LAPD Trace Start Mail Trace View PPP Trace View Q 931 Trace See Page 45 45 45 26 51 51 52 52 52 52 51 52 52 52 52 DIVA T A PC Card Reference Guide 20 Alphabetical List of Supported AT Commands Continued ATCommand AT Y AT A2 n AT A95 c AT MI1 n AT M2 n AT M3 n AT M4 n AT MTI1 n AT MT2 n AT P5 AT P6 AT P7 AT amp Cn AT amp Dn Description Enter Mini Monitor on Next Reset Protocol Control Incoming Data Call Answer Local Endpoint Discriminator Class Remote Endpoint Discriminator Class Local Endpoint Discriminator Address Remote Endpoint Discriminator Address Set Turbo Mode Bit Rate Set Turbo Mode Threshol
19. N Ordering Code IOC process We recommend the use of the following ISDN Ordering codes When ordering your ISDN line use these codes depending on which method your ISDN provider supports EZ ISDN Use ordering code 1 IOC Use ordering code R DIVA T A PC Card Reference Guide 8 What Is AutoSPID North America only AutoSPID is a new National ISDN protocol feature which enables the DIVA T A to download a list of Service Profile Identifiers SPIDs Directory Number and Call Type information from the ISDN line and to determine whether the SPIDs are currently initialized by other devices Note Check with your ISDN service provider to determine if they support the AutoSPID feature This feature effectively eliminates the need for you to configure any ISDN parameters AutoSPID works in the following manner If there are no SPIDs configured then AutoSPID attempts to determine and then assign SPIDs and DNs to the location designated to store the AutoSPID parameters The location for storing your AutoSPID information can be configured on the Advanced Configuration page If AutoSPID fails to detect the SPIDs try entering the DNs in a 10 digit format and the DIVA T A will attempt to perform generic SPID guessing Unless the SPIDs and DNs are configured correctly whether through AutoSPID SPID guessing or configured manually ISDN will fail to initialize the D LED will flash The only way to use the DIVA T A without e
20. PID Number gt Tests the specified SPID To perform this test you must be connected to National ISDN or AT amp T SESS Custom interface The test is only supported if neither logical channel is initialized either with a SPID or in NIT mode If required clear the SPID and disable NIT mode for both channels then reset the card You can then run two SPID tests further tests will be rejected n lt blank gt Retrieves any AutoSPID data downloaded from the SPCS during location detection Note that this command does not initiate the AutoSPID procedure it simply retrieves historical data The following information is retrieved SPIDs DNs CTs v voice d data p packet error code Note If AutoSPID cannot detect DNs and CTs these fields will be empty If an AutoSPID download has not been performed no information will be retrieved View initial Profile DIVA T A PC Card Reference Guide 51 Utility Commands Continued Command Description AT VL AT VM ATS VP AT VQ ATS SL AT SM AT SP AT SQ AT Y AT Z Starts or displays the result of a LAPD trace Controls the internal Mail Trace Your Eicon Technology Customer Services representative may ask you to use this command Format is ATS VM total size entry_size filter parameters are optional Example AT VM starts mail trace with default size of 16K entry_size of 64 bytes no filter AT VM p to pause the mail trace AT VM r to reset the
21. Remote Endpoint Discriminator Class Specifies the remote endpoint discriminator class See the section Endpoint Discriminator Class Address on page 50 Local Endpoint Discriminator Address Specifies the local endpoint discriminator address See the section Endpoint Discriminator Class Address on page 50 Remote Endpoint Discriminator Address Specifies the remote endpoint discriminator address See the section Endpoint Discriminator Class Address on page 50 Enable Bandwidth Allocation Control Protocol Bandwidth on Demand Specifies whether Bandwidth Allocation Control Protocol is enabled or disabled n 0 Disable n 1 Enable default DIVA T A PC Card Reference Guide 48 Multilink PPP Commands Continued Command Description AT P6 n Set Initial Billing Interval Timer Sets the timer secs to match the amount of time your ISDN provider allocates as the first time interval Note If the value is set to 0 the timer is not used Setting this value to 0 also effectively sets AT P7 to 0 n can be a value from 0 to 65535 Default value 60 seconds AT P7 n Set Billing Interval Timer Sets the timer secs to match the amount of time your ISDN provider designates as the minimum chargeable unit for all subsequent billing Note If the value is set to 0 the timer is not used n can be a value from 0 to 65535 Default value 60 seconds DIVA T A PC Card Reference Guide 49 Endpoint Discriminator Clasy Addres
22. an 32 or the carriage return character value cannot be used for the backspace character The AT sequence may be followed by any command sequence except for the following ATZ ATD ATA AT MENU AT gt H AT gt VC AT gt VD AT gt VT and AT gt Z Commands following these on the same command line are ignored e Execution of commands ATD and ATA either as a result of a direct command or a re execute command will be aborted if another character is entered before completion of the handshake e The maximum number of characters on any command line is 80 including A and T e Ifa syntax error is found in a command the remainder of the line will be ignored and an ERROR code will be returned e Missing decimal parameters n are assumed as 0 e Most commands entered with parameters out of range will not be accepted and the ERROR response will be returned to the DTE e The next command will only be accepted by the DIVA T A once the previous command has been fully executed ATCommand Groups Group See page General AT Commands 25 ISDN Configuration Commands 29 COM Port Configuration Commands 34 Call Control Commands 39 V120 Configuration Commands 42 V 110 Configuration Commands 45 Profile Commands 45 Multilink PPP Commands 48 Utility Commands 51 Mini monitor Commands 53 DIVA T A PC Card Reference Guide 15 Alphabetical List of Supported AT Commands The following table summarizes the AT Commands supported by the DIVA
23. d Enable Bandwidth Allocation Control Protocol Bandwidth on Demand Set Initial Billing Interval Timer Set Billing Interval Timer Data Carrier Detect Data Terminal Ready See Page 52 39 39 48 48 48 48 35 36 48 49 49 34 34 DIVA T A PC Card Reference Guide 21 Alphabetical List of Supported AT Commands Continued ATCommand __ Description See Page AT amp F Loading Factory Profile 46 AT amp Kn Flow Control 35 AT amp Sn Data Set Ready 35 AT amp V View Current and Stored Profile 47 AT amp Wn Save Current to Stored Profile 46 AT amp Yn Designate Stored Profile n as the 46 Powerup Profile AT amp Zn n Store Telephone Number s 40 AT n Last accessed S Register to Value n 26 AT gt F Restores All Profiles to Factory 46 Settings AT gt FC Reset Current Profile 46 AT gt Hs View Help Information 27 AT gt VC View Current Profile 47 AT gt VCC View Call and COM Port 26 Parameters DIVA T A PC Card Reference Guide 22 Alphabetical List of Supported AT Commands Continued ATCommand Description See Page AT gt VCD View Dynamic Parameters 26 AT gt VDD Initialization Status Display 27 North America Only AT gt VCP View Protocol Parameters 27 AT gt VCS View Static Parameters 27 AT gt VD View Link And Connection 26 Status Information AT gt VDC View Connection Status 26 AT gt VDL View Link States 26 AT gt VPn View Stored Profile n 47 AT gt VT View Stored Phone Numbers 26 AT gt Z Restart the DIVA T A
24. e devices can be attached to the line and used as needed That means an ISDN line can take care of most people s complete communications needs without forcing the purchase of multiple analog phone lines at a higher transmission rate The Digital in ISDN refers to its purely digital transmission as opposed to the analog transmission of plain old telephone service If you re using a modem for Internet access at this moment your Internet service provider s modem has converted this site s digital content to analog signals before sending it to you and your modem converts those signals back to digital when receiving the same thing happens with every keystroke and mouse click you transmit When you connect with ISDN there is no analog conversion ISDN transmits data digitally resulting in a very clear transmission quality There is none of the static and noise of analog transmissions that can slow transmission speed DIVA T A PC Card Reference Guide 4 Network refers to the fact that ISDN is not simply a point to point solution like a leased line ISDN networks extend from the local telephone exchange to the remote user and include all of the telecommunications and switching equipment in between When you have ISDN you can make connections throughout the world to other ISDN equipment If your ISDN equipment includes analog capabilities you can also connect to analog modems fax machines and telephones even though they may be connected to
25. esponse Word messages are preceded and terminated by the sequence lt CR gt lt LF gt Numeric codes are terminated by lt CR gt only The Result Code Format command ATVn determines short or long form usage The following table provides the AT command result codes in both number code and word message as well as a description ee Word Message Description 0 OK The DIVA T A has successfully executed your command 1 CONNECT Connection was made the range of the result code response is restricted by the X command such that no speed reporting is allowed or the bitrate is less than or equal to 300 bps 2 RING Incoming ringing is detected on the line 3 NO CARRIER Attempt to establish a connection failed Connection ended DIVA T A PC Card Reference Guide 54 AT Command Result Codes Continued Number Code 4 word message Description ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 7200 Syntax of command is incorrect Unable to execute command Command does not exist Entered command is outside permitted range Connection made at a bitrate less than or equal to 1200 bps ISDN not initialized Remote user busy Remote user not responding Connection made at a bitrate less than or equal to 2400 bps Connection made at a bitrate less than or equal to 4800 bps Connection made at a bitrate less than or equal to 9600
26. for the calling party and provides the calling party with the telephone numbers of those ports A bandwidth control protocol also allows a user at the calling location to establish a multilink session by knowing only one telephone number instead of all the numbers to be dialed for the full session With a bandwidth control protocol the answering location provides the calling location with a list of the remaining telephone numbers to be used for the connection and the additional channels are dialed by the calling equipment transparently to the user This effectively raises a 64kbps connection into a 128 kbps connection BACP BOD also controls whether the second line is required or not When bandwidth demand goes up the second B channel can automatically be established and conversely when bandwidth demand goes down the second channel can be dropped The primary advantage therefore is a reduction of dial up charges a second line is only used and hence paid for when it is required DIVA T A PC Card Reference Guide 12 What Is Data Compression To establish communications over a PPP link each end of the connection must first send packets to configure and test the data link After the link has been established optional facilities may be negotiated as needed One such facility is data compression A wide variety of compression methods may be negotiated although typically only one method is used for both directions of the link Data co
27. hannel DIVA T A PC Card Reference Guide 17 Alphabetical List of Supported AT Commands Continued ATCommand Description See Page AT C51 n Enable Disable Alternate Non 31 initializing mode for second B channel AT C6 n ISDN Primary SPID Number 31 applicable to North America only AT C6l n ISDN Alternate SPID Number 31 applicable to North America only AT C7 n ISDN Primary SPID Number 31 for second B channel applicable to North America only AT C71 n ISDN Alternate SPID Number 31 for second B channel applicable to North America only AT E0 n V 120 N201 Tx Maximum 42 Transmit Frame Size AT El n V 120 N201 Rx Maximum 42 Receive Frame Size AT E2 n V 120 Multiframe Mode 42 AT E3 n V 120 K Window Size 43 AT E4 n V 120 T200 Retransmission 43 Timer AT E5 n V 120 N200 Maximum Retry 43 Count DIVA T A PC Card Reference Guide 18 Alphabetical List of Supported AT Commands Continued ATCommand AT E6 n AT E7 n AT N1I n AT N11 n AT N2 n AT N21 n AT N3 n AT N31 n AT N4 n AT N41 n AT On AT V0 n AT V1 n AT V2 n Description V 120 T203 Link Integrity Timer V 120 Idle Timer ISDN Primary Directory Number ISDN Alternate Directory Number ISDN Primary Directory Number for second B channel ISDN Alternate Directory Number for second B channel ISDN Primary Subaddress ISDN Alternate Subaddress ISDN Primary Subaddress for second B channel ISD
28. ister DIVA T A PC Card Reference Guide 25 General AT Commands Continued Command ATSn AT MENU AT n AT gt VD AT gt VDL AT gt VDC AT gt VT AT gt VCC AT gt VCD Description Reports the Value of S Register n This command reports the last value stored into S Register n If n is omitted the value of the last S Register accessed is reported Activate VT100 Configuration Tool The AT MENU command activates the DIVA T A VT100 Configuration tool for configuring basic ISDN parameters Last Accessed S Register to Value n Use this command to set the last accessed S Register to the new value n View Connection and Link Status Information This command displays link and connection status for troubleshooting problems Your Eicon Technology Customer Services representative may ask you to display this information View Link States Displays the link states View Connection Status Displays the connection status View Stored Telephone Numbers You can display a list of all stored telephone numbers currently saved on your DIVA T A View Call and COM Port Parameters Displays the Call and COM Port dynamic parameters View Dynamic Parameters Displays all dynamic parameters Call COM V 120 PPP MLPPP DIVA T A PC Card Reference Guide 26 General AT Commands Continued Command AT gt VDD AT gt VCP AT gt VCS AT gt Hs AT Description Initialization Status Display North America onl
29. mber of sequential data frames that may be outstanding not acknowledged at any given time Valid range is 1 127 frames Default 7 V 120 T200 Retransmission Timer Applicable to the multiframe mode only T200 Retransmission Timer is the maximum time allowed to determine if a transmitted frame was received by the remote device prior to its retransmission The unit of measurement is 1 10 seconds Valid range is 1 255 Default 15 equal to 1 5 second The value specified for T200 Retransmission Timer must be less than the value specified for T203 Link Integrity Timer Otherwise the default values are used V 120 N200 Maximum Retry Count Applicable to the multiframe mode only N200 Maximum Retry Count is a system parameter which identifies the maximum number of retransmissions of a frame due to T200 expiring When the maximum number of retransmissions is reached the recovery process is started which may cause call disconnection Valid range is 1 10 Default 3 DIVA T A PC Card Reference Guide 43 V120 Configuration Commands Continued Command Description AT E6 n ATI IE7 n V 120 T203 Link Integrity Timer Applicable to the multiframe mode only T203 Link Integrity Timer is the maximum time allowed without frames including data and control being exchanged Its purpose is to verify that the remote device is still online and operational When the Link Integrity Timer expires recovery procedures are sta
30. mpression is a process where the effective throughput is increased by encoding data in such a way that fewer bits are required to represent it For example a text file might be compressed by representing common words with single characters thus if the word the is represented by the character it will be transmitted three times faster Popular compression algorithms typically reduce the size of the data by 50 effectively doubling the rate at which it is transmitted The Compression Control Protocol CCP works with MLPPP and is responsible for configuring enabling and disabling data compression algorithms on both ends of the point to point link PC Compression negotiation takes precedence over the DIVA T A negotiation for performance considerations for example the PC compression may reduce the number of bytes that go through the serial interface the PC has the quicker CPU etc The DIVA T A compression negotiation however will assume control should no compression be detected or the initial negotiation fail No user configuration is required to enable the DIVA T A s compression functionality Compression algorithms currently supported by the DIVA T A include Stacker LZS Hi fn MPPC Microsoft and Ascend DIVA T A PC Card Reference Guide 13 ATCommands This section contains a description of all AT Commands relevant to DIVA T A Locating Commands To make it easier for you to locate a command this guide has o
31. n to use when you are in a different location n 255 No alternate switch type Use this command when you want to disable all alternate settings Entering a valid switch type causes the DIVA T A to use the alternate settings if ISDN initialization has failed using the primary settings DIVA T A PC Card Reference Guide 29 ISDN Configuration Commands Continued Command Description AT Cl n AT CI1 n continued AT C2 n AT C4 n AT C41 n For International Firmware n 2 EuroISDN default n 3 TPH Australia n 4 INS Net64 Japan n 254 Enables the alternate switch type with the same value as the primary switch type AutoSPID Storage Location Sets the ISDN AutoSPID storage location to Primary or Alternate North American version only n 0 Primary default n Alternate Note This parameter is static Changes do not take effect until you restart your DIVA T A Enable Disable Non Initializing mode first B channel Specifies whether the first B channel in the ISDN primary AT C4 or alternate AT C41 ISDN settings is set to Non Initializing mode North American version only n 0 Disable Non initializing mode default n 1 Enable Non initializing mode Note These parameters are static They do not take effect until you restart your DIVA T A DIVA T A PC Card Reference Guide 30 ISDN Configuration Commands Continued Command Description AT CS n Enable Disable Non Initializing
32. n are supported Windows NT only In order to support incoming calls with Windows NT RAS Server you must enable the parameter Allow clear text authentication in the RAS Server setup Refer to the RAS online help on how to configure this parameter Note These parameters are static They do not take effect until you restart your DIVA T A Incoming Data Call Answer Sets how incoming data calls are handled accepted or rejected c E All incoming data calls can be accepted either by the DIVA T A ATSO 1 or by the application default c D All incoming data calls are rejected upon receipt DIVA T A PC Card Reference Guide 39 Call Control Commands Continued Command Description AT amp Zn v ATA ATDn Store Telephone Number Specify stored telephone number s The telephone number can be a string with up to 20 characters 0 9 space hyphen parenthesis and period are accepted You can store up to ten telephone numbers where n identifies the memory location number 0 9 and v is the telephone number Answer Calls Instructs the DIVA T A to accept an incoming call Dial a Number Directs the DIVA T A to go online dial the specified number and attempt to establish a connection Punctuation characters may be used for clarity with parentheses hyphens spaces and periods being ignored Also the P sE Ww ES and R dial modifiers used by modems are ignored since they are not
33. nate AT N11 n configuration This number is used by the DIVA T A to identify itself on outgoing calls and to recognize incoming calls which are destined for it This number is a string with up to 20 characters Valid characters are 0 9 and Default null string Note These parameters are static They do not take effect until you restart your DIVA T A AT N2 n ISDN Directory Number for 2 B channel AT N21 n Your local ISDN data directory number as assigned by your local telephone company for your primary AT N1 n or alternate AT N11 n configuration This number is used by the DIVA T A to identify itself on outgoing calls and to recognize incoming calls which are destined for it This number is a string with up to 20 characters Valid characters are 0 9 and Default null string Note These parameters are static They do not take effect until you restart your DIVA T A DIVA T A PC Card Reference Guide 32 ISDN Configuration Commands Continued Command Description AT N3 n ISDN Subaddress for 1 B channel The AT N3l n ISDN subaddress is used to further identify the terminal on the ISDN basic rate interface for your primary AT N3 n or alternate AT N31 n configuration In cases where two terminals share the same directory number the subaddress identifies which terminal will answer a particular incoming call This number is a string with up to 20 characters Valid characters are 0 9 and Default
34. ntering SPIDs is to configure the ISDN numbers for Non Initializing Terminal mode DIVA T A PC Card Reference Guide 9 What is Non Initializing Terminal Mode North America only Non Initializing Terminal mode is a new ISDN NI 1 protocol feature which enables the DIVA T A to operate without SPIDs This leaves the SPIDs available for use by other ISDN devices connected over the same NT1 To configure the DIVA T A for Non Initializing Terminal mode deselect the SPID checkbox in the Windows Configuration Tool or specify Yes for the Non Initializing parameter in the VT 100 Configuration Tool Warning NI 1 switches only While in Non Initializing Terminal mode the DIVA T A will only allow outgoing calls to be made and most line interfaces will allow some form of restricted operation for example access to operator and emergency services All incoming calls will be rejected No AutoSPID information will be stored in non volatile memory however the auto detection status remains available Note Check with your ISDN service provider to determine if they support Non Initializing terminal mode DIVA T A PC Card Reference Guide 10 What is Multilink PPP The DIVA T A serves as an intermediary between its host workstation and the remote device to which data is being transmitted All the protocol processing required for the negotiation of a Multilink PPP connection is performed on the DIVA T A itself The PC forwards asynchronou
35. null string this is an optional value Note These parameters are static They do not take effect until you restart your DIVA T A AT N4 n ISDN Subaddress for 2 B channel The AT N41 n ISDN subaddress is used to further identify the terminal on the ISDN basic rate interface for your primary AT N4 n or alternate AT N41 n configuration In cases where two terminals share the same directory number the subaddress identifies which terminal will answer a particular incoming call This number is a string with up to 20 characters Valid characters are 0 9 and Default null string this is an optional value Note These parameters are static They do not take effect until you restart your DIVA T A AT On Outgoing Call Type Specifies the call type for outgoing calls n 0 Data call default n 3 Data over voice bearer capability call Note If you fail to connect with any of the primary ISDN settings the DIVA T A attempts the connection with the alternate ISDN parameters DIVA T A PC Card Reference Guide 33 COM Port Configuraton Commands This section describes the COM Port Configuration commands Command Description AT amp Cn Data Carrier Detect This command controls the Data Carrier Detect DCD output n 0 DCD always enabled n 1 DCD tracks connection default AT amp Dn Data Terminal Ready This command controls interpretation of the Data Terminal Ready DTR input n 0 Ignores status of DTR signal
36. o AT prefix required reports the result of the last AT command issued This command is useful for debugging long strings of AT commands and for determining which command was rejected and why DIVA T A PC Card Reference Guide 28 ISDN Configuration Commands This section describes the ISDN Configuration Commands Some of the commands in this section allow you to configure primary and alternative settings If the DIVA T A is unable to connect using the primary ISDN settings it automatically tries again using the alternate ISDN settings For example you could set up one profile containing information for calling from both home and the office If you call mainly from home enter information specific to home in the primary ISDN settings and enter information specific to the office in the alternate ISDN settings Command Description AT Cl n AT ICI1 n ISDN Switch Type Specifies the ISDN Switch Type for your primary AT C1 or alternate AT C11 configuration Note These parameters are static They do not take effect until you restart your DIVA T A For North American Firmware n 0 National ISDN n 1 AT amp T 5ESS Custom n 9 default for North America Auto detect switch type If you have multiple ISDN line definitions the DIVA T A automatically determines the correct switch type to be used National ISDN or AT amp T SESS Custom This auto detect feature saves you from having to worry about which ISDN configuratio
37. plain old telephone service Benefits While ISDN accommodates telephones and fax machines its most popular advantage is in computer applications You can plug an ISDN adapter into a phone jack like you would an analog modem and get a much faster connection with no line noise The most common ISDN service Basic Rate Interface BRI provides two 64 Kbps channels per line When the two channels are bonded in a single connection you get a speed of 128 Kbps which is about four times the actual top speed of the fastest analog modems Compression can increase throughput to around 250 Kbps Telecommuters for example benefit immensely from ISDN Whether you access the corporate LAN in the evenings or maintain a full time remote home office ISDN is the next best thing to being there E mail database access and file transfers improve dramatically making it seem like you re locally attached to the LAN Internet access is another great application for ISDN Compared with even the fastest modem access ISDN makes Web graphics appear almost immediately and can reduce download times by over 75 ISDN can even provide advantages over shared higher bandwidth office connections PC Magazine advises that an ISDN connection can deliver better performance than a T1 shared among users on a LAN And in many markets it s actually cheaper than an isolated analog business line Such large scale file transfer applications as medical imaging insu
38. rance and law enforcement imaging and the preparation of printed materials are additional arenas where ISDN proves highly beneficial With the dramatic reduction in file transfer time ISDN makes even multi megabyte files available to recipients within minutes not hours Videoconferencing is an ISDN application that s growing fast in popularity and ISDN is currently the only way of making it happen DIVA T A PC Card Reference Guide 5 ISDN Communication Channels In the ISDN interface a number of communication channels are carried over a digital line These communication channels can vary by the type of information they transmit and by the transmission speed they support The number and type of channels used may vary The communication channels can be of the following types B Channel 64 Kbps D Channel 16 or 64 Kbps H Channel 384 1536 or 1920 Kbps not yet commercially available Different combinations of these channels are used to support different types of usage e g basic primary and broadband B Channel The B channel is a user bearer channel which carries a subscriber s digital traffic e g digitized video voice audio or digital data or perhaps a mixture The bandwidth of this channel is 64 Kbps The control signals used to set up the connection however are not sent over the B channel The call establishment is done on the D channel using common channel signaling This concept will be discussed shortly
39. rganized commands in two ways AT Commands are grouped into several categories Use the section AT Command Groups on page 15 to locate the relevant category An alphabetical list of commands is also available It is found in the section Alphabetical List of Supported AT Commands on page16 ATCommand Fomat When using AT commands you must follow these conventions e A command line consists of a prefix body and terminator Each command line must begin with AT except A and e AT commands must be terminated by a carriage return except A e Commands entered in upper or lower case are accepted e The body is a string of commands restricted to printable ASCII characters 032 126 e Space ASCII 032 and control characters other than CR ASCII 013 and BS ASCII 010 in the command string are ignored e A command line may be aborted at any time by entering lt ctrl x gt ASCII 024 e Carriage returns are programmable through register S3 e The default terminator is the ASCII lt CR gt character Characters that precede the AT prefix are ignored DIVA T A PC Card Reference Guide 14 Command Format Continued e The DIVA T A recognizes the backspace character for editing When echo is enabled a backspace or delete is echoed as a backspace character followed by a space character and another backspace The code used for the backspace character is programmable through register S5 Values equal to 0 or greater th
40. rted which may cause the disconnection of the current call The unit of measurement is seconds Valid range is 1 255 Default 30 The value specified for T200 Retransmission Timer must be less than the value specified for T203 Link Integrity Timer Otherwise the default values are used V 120 Idle Timer AT E7 n Idle Timer refers to the maximum time without the exchange of data frames between the local and the remote devices and before the automatic termination of the connection Its purpose is to reduce communications costs while data is not being transferred for a period of time operates in both the multiframe and unacknowledgement modes When Idle Timer expires this immediately initiates the disconnection of calls Setting a 0 value disables Idle Timer The unit of measurement is minutes Valid range is 0 10000 Default 1440 24 hours DIVA T A PC Card Reference Guide 44 V 110 Configuration Commands This section describes the V 110 configuration commands Command Description AT V0 n AT Vl n AT V2 n AT V3 n AT V4 n AT V5 n V 100 Configuration Override Specifies whether the DIVA T A uses the COM port setting to configure V 110 or overrides them with user settings n 0 Use the default settings n l Override the COM port settings as per AT V1 AT V2 AT V3 AT V4 and AT V5 Default n 1 V 110 Stream Rate Specifies the V 110 Stream Rate Values for n 1200 2400 4800 9600 19200
41. s Class Description 255 Null Class Locally Assigned Address Internet Protocol IP Address IEEE 802 1 Globally Assigned MAC Address PPP Magic Number Block Public Switched Network Directory Number Accept Any Remote Endpoint Discriminator Address Format No address is used Uses a hexadecimal format with a maximum length of 40 characters Valid characters are 0 9 a f ex AT M3 b3c66S5ac 1 Uses a numerical format with a maximum length of 15 characters Valid characters are 0 9 ex AT M4 192 219 23 100 Uses a hexadecimal format with a maximum length of 12 characters Valid characters are 0 9 a f ex AT M3 b3c66S5ac 1 Uses a hexadecimal format with a maximum length of 40 characters and the length must be a multiple of 8 Valid characters are 0 9 a f ex AT M3 b3c66Sacffff0001 Uses a normal telephone number with a maximum length of 15 Valid characters are 0 9 No address is used This class is valid only for remote endpoint discriminators EPDs and is used to accept any remote EPDs received that are all part of the same bundle DIVA T A PC Card Reference Guide 50 Utility Commands This section describes the Utility commands Command Description AT CP n AT In AT VI Enables or disables compression n 0 Disable n 1 Enable default On Demand SPID Testing North America only Lets you test SPIDs on demand n lt S
42. s PPP packets to the DIVA T A which in turn converts the packets for synchronous transmission and negotiates the various authentications required to establish the Multilink PPP connection with the target system over ISDN lines This allows for the more efficient use of the ISDN line without requiring any changes to the PPP stack currently loaded on your PC While Multilink PPP effectively doubles the DIVA T A s throughput to 128 kbps the DIVA T A can support COM port bit rates as high as 512 kbps by enabling the Turbo Mode feature Turbo Mode comprises a set of proprietary DIVA T A commands which permit the user to specify throughput speeds in excess of the traditional terminal emulation upper limit of 115200 bps The Turbo Mode bit rate is set using the AT MT1 command see page 35 for more on AT MT1 DIVA T A PC Card Reference Guide 11 What is BAC P BOD DIVA T A supports the Bandwidth Allocation Control Protocol BACP and Bandwidth on Demand BOD These two features combine to allow the DIVA T A to establish multilink sessions that provide larger amounts of bandwidth than that offered over a single dialup channel Such multilink sessions are established according to procedures defined in the Internet Engineering Task Force IETF PPP Multilink specification RFC 1717 BACP BOD works by informing the DIVA T A which dial in ports are presently available for a multilink session It allows the answering location to reserve those ports
43. scccssssscsscsscssscscccssscsesssssssesssscsesssscssesssees D What is Non Initializing Terminal Mode sscscscsssecsseosseee LO What is Multilink PPP ccsccsssssssssssssssssssssssssescssscsescsesseesees L What is BACP BOD scssccsssssscsssscseccssscssscssssssssssssssssssscseesssssees 12 What is Data Compression ccccscccssssssecsscssecssscseesssccsesssscesees LS AT Commannds scccsccssccssccsescsccsccsssscseesssccsesssscscesssccscsssscsssssscsees LA Alphabetical List of Supported AT Command cccscsssreeee 16 General AT Command cccsscccsscssscssscsecssscseessscssesssscssesssssseeesss LO ISDN Configuration Commands csscsccssscsscssscsesssccseesssceees 29 COM Port Configuration Commann ccsssccssssssssscssecsssessssees OF Call Control Commannd sssccssssssccsssssecssscscessscssesssscssesscseesssees OO V 120 Configuration Command cccsccccssssscsscssecssscsessscsseeees 42 V 110 Configuration Commangds ccccsccsscssscssscsecssccseessscseees 45 Profile Commands cccsscccsssssssscsscccsscscecssscsesssscsesssscseesssseeeses 40 Multilink PPP Commannd cscsssccsscssccsscsesssscsesssscsesssscsseeses 4S Utility Commands csccsccccsscssecssscsesssscscesssscscesssccseesssccsesssscseees SL Mini monitor Command ssccssssscssscssecssscssessscssesssssseessscsseeees
44. uire these higher rates are fast facsimile teleconferencing and video An H channel user can subdivide the channel using TDM to meet specific requirements Connecting to ISDN BRI and PRI There are two types of access interfaces to the ISDN Basic Rate Access also referred to as Basic Rate Interface BRI and Primary Rate Access also referred to as Primary Rate Interface PRI Basic Rate Access Basic Rate Interface or Access consists of two B channels operating at 64 Kbps and one D channel operating at 16 Kbps It is also commonly referred to as 2B D Primary Rate Access The primary rate interface is designed for users with large capacity requirements There is no single transmission rate defined for primary rate access In North America and Japan for example primary rate interface is based upon the T1 rate defined in detail shortly of 1 544 Mbps In Europe by comparison the rate is 2 048 Mbps DIVA T A PC Card Reference Guide 7 What is EZ ISDN IOC We highly recommend that you use our toll free ISDN ordering service to make sure you get the correct ISDN line the first time The service is free to our customers EZ ISDN IOC simplifies the ordering of your ISDN line It lets you use simple codes to order pre configured packages of ISDN features and services The North American ISDN User s Forum NIUF and Local Exchange Carriers LEC administer the assignment of codes Bellcore administers the National ISD
45. y Displays information about the detection progress the initialization of the logical channels as well as auxiliary information View Protocol Parameters Displays the protocol parameters V 120 PPP MLPPP View Static Parameters Displays all static parameters ISDN Rate Adaptation View Help Information Displays full or partial help for any AT command where s specifies which AT command help is requested for View Last Accessed S Register This command displays the contents of the selected S Register The selected S Register is the last S Register that was accessed using an S Register command or selected with the ATSn command Re execute Previous Command Re executes all the commands in the command buffer This command is mainly used to place another call using the ATD dial command that failed to connect due to a busy line no answer or a wrong number This command is not preceded by AT nor followed by Enter DIVA T A PC Card Reference Guide 27 General AT Commands Continued Command Description Escape Sequence The escape sequence is used to return to the command state from data state To issue the escape sequence wait one second then enter the escape character three consecutive times and wait another second Its value is stored in S Register 2 The default value of the escape character as stored in S Register 2 is 22 Last AT Command Result Explained The command n
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