DIVA T/A ISDN Modem Reference Guide
Eight Edition (July 1999) 206-193-08 DIVA T/A ISDN Modem 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.
Contents What is ISDN? ......................................................................................................................... 4 ISDN Communication Channels ............................................................................................................... 6 Connecting to ISDN - BRI and PRI ............................................................................................................ 8 What is Multilink PPP? ........................................................
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.
What is ISDN? 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.
What is ISDN? 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.
What is ISDN? H-Channel The H-channel is used for high-speed user data traffic at bit rates higher than 64Kbps. Examples of services which require these higher rates are fast facsimile, teleconferencing, and video. An H-channel user can subdivide the channel using TDM to meet specific requirements.
What is ISDN? 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.
What is ISDN? What is Multilink PPP? Multilink PPP combines two 64 Kbps ISDN channels to provide a maximum transmission speed of 128 Kbps. 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.
What is ISDN? What is BACP/BOD? DIVA T/A supports the Bandwidth Allocation Control Protocol (BACP) and Bandwidth on Demand (BOD). BACP/BOD refers to the ability of a system to allocate and remove links in a multilink connection in order to lower or increase its bandwidth. BACP/BOD monitors the flow of traffic across your ISDN connection.
What is ISDN? What is DBA? DIVA T/A also supports Dynamic Bandwidth Allocation (DBA), known also as Call Bumping. DBA automatically drops one B-channel to allow an incoming or outgoing telephone, fax or modem call. When the voice call is over, DBA automatically re-establishes the multilink session by reconnecting the second B-channel, if the throughput requires it. It is recommended that you use DBA with BACP/BOD so that you can have greater flexibility when using the DIVA T/A.
What is ISDN? What is Always On / Dynamic ISDN (AO/DI)? AO/DI is only available if you have subscribed to it, your ISDN service provider supports it, and you are using Multilink PPP. AO/DI uses the ISDN D-channel X-25 packet service to maintain an “always on” connection between you and your Service Provider. Low bandwidth requirements can be met using this constant connection, such as sending and receiving e-mail, credit card verification, etc.
What is ISDN? 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.
Locating AT Commands To make it easier for you to locate a command, this guide has organized commands in two ways. • A list of AT Commands grouped into categories can be found on page 16. • An alphabetical list of commands is available on page 17. AT Command Syntax Conventions When issuing AT commands, you must abide by the following syntax conventions: • A command line consists of a prefix, body, and terminator. Each command line must begin with “AT” (except A/).
Locating AT Commands • The next command will only be accepted by the DIVA T/A once the previous command has been fully executed.
AT Command Groups The AT commands in this guide are grouped according to their functions. For an alphabetical list of all commands, see page 17. General AT Commands ................................................... 29 ISDN Configuration Commands .................................. 31 COM Port Configuration Commands......................... 36 Call Control Commands.................................................. 39 V.120 Configuration Commands ................................. 42 V.
Alphabetical List of Supported AT Commands The following tables summarize, in alphabetical order, the AT Commands supported by the DIVA T/A. Go to the specified page number for more information on a particular command. AT! Commands ................................................................... 18 AT% Commands ................................................................ 20 AT& Commands ................................................................. 21 AT* Commands .................................
Alphabetical List of Supported AT Commands AT! Commands AT!An Directory Number/Port Assignment (static) 31 AT!C1=n ISDN Switch Type (static) 32 AT!C4=n Enable/Disable Non-initializing mode for primary B-channel (North America only) (static) 32 AT!C5=n Enable/Disable Non-initializing mode for second B-channel (North America only) (static) 32 AT!C6=n ISDN SPID Number for primary B-channel (North America only) (static) 32 AT!C7=n ISDN SPID Number for second B-channel (North America only) (stat
Alphabetical List of Supported AT Commands AT!V3=n V.110 Parity (International version only) 44 AT!V4=n V.110 Stop Bits (International version only) 44 AT!V5=n V.110 Flow Control (International version only) 44 AT!X1=n Specifies the X.25 version you are using. 49 AT!X2=n Specifies the X.25 DTE address. 49 AT!X3=n Specifies the X.25 facilities that are to be included each time a call is made. 49 AT!X4=n Specifies the local ISDN prefixes to be used. 49 AT!X5=n Specifies the X.
Alphabetical List of Supported AT Commands AT% Commands AT%A2=n Protocol Control (static) 40 AT%A4=n ISDN Communication Speed 40 AT%A95=c Incoming Data Call Answer 40 AT%M1=n Local Endpoint Discriminator Class 46 AT%M2=n Remote Endpoint Discriminator Class 46 AT%M3=n Local Endpoint Discriminator Address 46 AT%M4=n Remote Endpoint Discriminator Address 46 AT%P5=n Enable Bandwidth Allocation Control Protocol / Bandwidth on Demand 46 AT%P6=n Set Initial Billing Interval Timer 46 AT%
Alphabetical List of Supported AT Commands AT& Commands AT&Cn Data Carrier Detect 36 AT&Dn Data Terminal Ready 37 AT&F Loading Factory Profile 45 AT&Kn Flow Control 37 AT&Sn Data Set Ready 37 AT&V View Current and Stored Profile 45 AT&Wn Save Current to Stored Profile 45 AT&Yn Designate Stored Profile n as the Powerup Profile 45 AT&Zn=v Store Telephone Number(s) 40 DIVA T/A ISDN Modem Reference Guide ◆ Page 21
Alphabetical List of Supported AT Commands AT* Commands AT*An=v Abbreviated Ring Control (North America only) 59 AT*Bn=v ISDN Bearer Capability (static) 59 AT*Cn Analog Device Caller ID Delivery (static) 59 AT*Dn=v Internal Dial Access (Calling Features) (static) 59 AT*En=v Analog Device port Incoming/Outgoing Call Selection 59 AT*Fn Analog Device Ring Frequency (static) 60 AT*Kn=v Analog Device Calling Features (North America only) (static) 60 AT*M=v Visual Message Waiting Indicator
Alphabetical List of Supported AT Commands AT> Commands AT>? Last AT Command Result Explained 29 AT>F Restores All Profiles to Factory Settings 45 AT>FC Reset Current Profile 45 AT>Hs View Help Information 29 AT>VC View Current Profile 45 AT>VCC View Call and COM Port Parameters 45 AT>VCD View Dynamic Parameters 45 AT>VCP View Protocol Parameters 45 AT>VCS View Static Parameters 45 AT>VD View Link And Connection Status Information 29 AT>VDC View Connection Status 29 AT>VDD
Alphabetical List of Supported AT Commands AT@ Commands AT@DATE? Current Date 29 AT@DATE= Set Date 29 AT@MENU Activate VT100 Configuration Tool 29 AT@TIME? Current Time 29 AT@TIME= Set Time 29 DIVA T/A ISDN Modem Reference Guide ◆ Page 24
Alphabetical List of Supported AT Commands Other AT Commands AT? View Last Accessed S Switch 57 AT=n Last accessed S-Register to Value n 57 ATA Answer Calls 40 A/ Re-execute Previous Command 30 ATDn Dial a Number 41 ATEn Local Echo 36 ATH Hang up a Call 41 ATIn View Product Information 29 ATO Return Online 29 ATQn Quiet Result Codes 36 ATSn Establishes S-Registers n as the selected register 57 ATSn=v S-Register n to Value v 57 ATSn? Value of S-Register n 57 ATVn Resu
Alphabetical List of Supported AT Commands S-Registers S0 Auto-Answer 57 S1 View Ring Count 57 S2 Escape Character 57 S3 Carriage Return Character 57 S4 Line Feed Character 57 S5 Back Space Character 57 S25 Data Terminal Ready Detection Delay 58 DIVA T/A ISDN Modem Reference Guide ◆ Page 26
Alphabetical List of Supported AT Commands AT$ (Utility) Commands AT$CP=n Enable/Disable Compression 54 AT$EX View Exprintf buffer 54 AT$In On Demand SPID Testing (North America only) 54 AT$IG SPID Guessing (North America only) 54 AT$Rn Action on fatal error 54 AT$SL Stop LAPD Trace 54 AT$SM Stop Mail Trace 54 AT$SP Stop PPP Trace 54 AT$SQ Stop Q.931 Trace 54 AT$SX Stop X.
Alphabetical List of Supported AT Commands Mini-monitor Commands These command are only available when you are in Mini-monitor mode; they are not available when you are in command mode. The commands AT$Y or AT$Z will enter the Mini-monitor; see page 27 for more information. These commands are all case sensitive.
General AT Commands The following table describes the general AT commands available to the DIVA T/A. 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=6 Displays data pump chipset version. n=8 Displays Eicon Technology DIVA T/A. n=9 Display the external COM port plug and play ID of the DIVA T/A. n=20 Displays product number.
General AT Commands A/ 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. +++ Escape Sequence. The escape sequence is used to return to the command state from data state.
ISDN Configuration Commands The following table describes the ISDN Configuration Commands. AT!An Directory Number/Port Assignment. This command specifies which ports answer to which directory numbers. There are six ports available on the DIVA T/A: Phone 1, Phone 2, Voice to PC 1, Voice to PC 2, Data 1, and Data 2. Determining the value for n Use the binary table below. If a bit is set to 0, the corresponding port answers Directory Number 1. If set to 1, the corresponding port answers Directory Number 2.
ISDN Configuration Commands AT!C1=n ISDN Switch Type. Specifies the ISDN Switch Type. For North American Firmware: n=0 National ISDN n=1 AT&T 5ESS Custom n=9 Auto-detect switch type (default for North America). The DIVA T/A automatically determines the correct switch type to be used (National ISDN or AT&T 5ESS Custom). For International Firmware: n=2 EuroISDN (default). n=3 Australia - Microlink (TPH1962/TS013). n=4 INS-Net64 (Japan). n=5 China ISDN.
ISDN Configuration Commands AT!D3=n Default Parity. Specifies the parity to be used, when the DTE characteristics cannot be determined by AutoBauding (AT has not been typed since power up). n=0 None (default). n=1 Even. n=2 Odd. AT!D4=n Default Stopbits. Specifies the number of Stopbits to be used, when the DTE characteristics cannot be determined by AutoBauding (AT has not been typed since power up). Values: 1, 2. Default:1 AT!Ln Set ISDN Encoding Law.
ISDN Configuration Commands AT!N2=n ISDN Directory Number Assignments for 2nd B-channel and 2nd Phone port. This command assigns one ISDN directory number to the 2nd B-channel and up to two numbers to the 2nd Phone port. The 2nd B-channel only responds to the first number specified in the command, while the 2nd Phone port responds to either number. Numbers are separated by a semicolon (;).
ISDN Configuration Commands AT!On Outgoing Call Type. Specifies the default call type for outgoing calls when a user enters an ATD command without a special modifier. Use of a modifier overrides this parameter. n=0 Data call using protocol set in AT%A2=n (default). n=3 Data over voice bearer capability call (North America only) n=4 Transparent over voice (Audio) (reserved for RVSCOM). n=5 Transparent over voice (speech) (reserved for RVSCOM).
COM Port Configuration Commands The following AT commands pertain to the COM port configuration. AT&Cn Data Carrier Detect. This command controls the Data Carrier Detect (DCD) output. n=0 DCD always enabled. n=1 DCD tracks connection (default). 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).
COM Port Configuration Commands 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.
COM Port Configuration Commands 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 (default). For example, CONNECT 19200. n=1 Upon connection, the DIVA T/A reports the DCE speed. For example, CONNECT 64000.
Call Control Commands The following table describes the Call Control Commands. AT!T1=n Incoming Call Assignment (first directory number). Specifies the type of incoming ISDN calls that DIVA T/A can accept on the first directory number. n=0 Only available on DIVA T/A models that have an analog device port. Specifies that all analog device voice calls (e.g. telephone, fax/modem over ISDN) are directed to your analog device port. This option does not permit you to receive ISDN data calls.
Call Control Commands AT%A2=n Protocol Control. Specifies the protocol you want to use for your ISDN connection. n=0 HDLC-Transparent mode n=2 V.120 rate adaption protocol. n=4 V.110 rate adaption protocol (international version only) n=95 PPP asynchronous to synchronous conversion (International default). n=96 Multilink PPP connection (North American default). Notes: • Both PPP and Multilink PPP require that a PPP communications stack be installed on your computer.
Call Control Commands ATDn Dial a Number. Directs the DIVA T/A to dial the specified number, attempt to establish a connection, and go online. Punctuation characters may be used for clarity, with parentheses, hyphens, spaces, and periods being ignored. Also, the “P”, “T”, “W”, “@”, “,” and “R” dial modifiers used by modems are ignored since they are not relevant to ISDN. The “~” and “&” characters are used to dial two numbers within the same dialing string.
V.120 Configuration Commands The following AT commands pertain to V.120 configuration on your DIVA T/A. AT!E0=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. Range: 16 to 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. AT!E1=n V.
V.120 Configuration Commands AT!E5=n 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. Range: 1 to 10. Default: 3. AT!E6=n V.120 T203 (Link Integrity Timer). Applicable to the multiframe mode only.
V.110 Configuration Commands Use the following AT commands to specify the V.110 configuration on your DIVA T/A (International version only). AT!V0=n V.110 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=1 Override the COM port settings as per AT!V1, AT!V2, AT!V3, AT!V4, and AT!V5 (default). AT!V1=n V.110 Stream Rate. Specifies the V.
Profile Commands The following table describes the profile commands: AT&F 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 replaced. AT&V View Current and Stored Profiles. Displays the current and stored profiles as well as stored telephone numbers in your DIVA T/A.
Multilink PPP Commands The following table describes the MLPPP configuration commands. AT%M1=n Local Endpoint Discriminator Class. The value for ‘n’ specifies the Local Endpoint Discriminator Class. If you specify n=1 (class 1), the Local Endpoint Discriminator Address (specified with AT%M3=n) must be an even number. For a list of classes, see “Endpoint Discriminator Class/Address” on page 48. AT%M2=n Remote Endpoint Discriminator Class.
Multilink PPP Commands AT%P8=n Dynamic Bandwidth Allocation (only available on models equipped with analog device ports). Specifies whether Dynamic Bandwidth Allocation (also known as Call Bumping) is enabled or disabled. When enabled, the DIVA T/A will automatically assign one of the two B channels (both used for data) to an incoming or outgoing analog device call (voice). When the call is completed, the DIVA T/A automatically reassigns the second B-channel to the data connection. n=0 Disable.
Multilink PPP Commands Endpoint Discriminator Class/Address The following table describes the list of classes and permitted addresses for certain MultiLink PPP commands. Class Description Address Format 0 Null Class No address is used. 1 Locally Assigned Address Uses a hexadecimal format with a maximum length of 40 characters. Valid characters: “0-9, a-f”. The number of digits must be even (ex. AT%M3=b3c665ac11).
Always On / Dynamic ISDN AT Commands The following table describes the Always On / Dynamic ISDN AT commands. AT!X1=n X.25 Version. Specifies the X.25 version you are using. There are two X.25 CCITT recommendations available for selection, 1984 and 1988. This information is provided by your Service Provider and should match the X.25 recommendation supported on the switch you are connecting to. n=0 1984 (default). n=1 1988. AT!X2=n X.25 DTE Address. Specifies the X.25 DTE address. An X.
Always On / Dynamic ISDN AT Commands AT!X6=n X.25 Maximum Window Size. Specifies the X.25 maximum window size. It is sometimes desirable to have a large window size. This is particularly true for satellite networks that have significant transmission delays. Maximum window size can never be exceeded. If a larger window size is requested when the call is established (through X.25 Facilities field), it is negotiated downward so that the maximum window size is respected. Default: 7.
Always On / Dynamic ISDN AT Commands AT!X13=n Delay Before Opening 2nd B-channel (with BACP enabled). Specifies the amount of time (in seconds) the throughput on your 1st B-channel must exceed the Opening Threshold (AT!X14=n) before the 2nd B-channel is added to the AO/DI connection.
Always On / Dynamic ISDN AT Commands AT!X18 Set Normal Mode for Bandwidth on Demand. Sets the Bandwidth on Demand thresholds and delays to pre-configured values. ‘Normal Mode’ is equivalent to the default values for each setting, and is defined as follows: AT!X10=5 Sets ‘Delay before Opening 1st B-channel’ to 5 seconds. AT!X11=70 Sets ‘1st B-channel Opening Threshold’ to 70 seconds. AT!X12=40 Sets ‘1st B-channel Closing Threshold’ to 40 seconds.
Always On / Dynamic ISDN AT Commands AT!X25=n Specify Number of Logical Connection Numbers. Note that the number of Logical Connection numbers affects the range of AT!X21. See AT!X21. Range: 1-4. Default: 1. AT!X26=n Specify Type of User Data for X.25 Call Request Packet. Specifies the type of user data for X.25 call requests. Normally, the value of this parameter should be left to the default CF (PPP over X.25).
Utility Commands The following table describes the Utility Commands. AT$CP=n Enable / disable compression. n=0 Disable n=1 Enable (default) AT$EX View Internal ExPrintf log buffer. AT$In On Demand SPID Testing (North America only). Lets you test SPIDs on demand. n= Tests the specified SPID. To perform this test you must be connected to National ISDN or AT&T 5ESS Custom interface. The test is only supported if neither logical channel is initialized (either with a SPID or in NIT mode).
Utility Commands AT$VL Start or display the Result of a LAPD trace. You can specify the total size of the trace buffer and the length of each trace entry. Use the following syntax: AT$VL [trace size, entry length], where trace size and entry length are specified in hexadecimal values. For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VL 8000, 100. If you do not specify trace size and length, the default values are used.
Utility Commands AT$VX Start an AO/DI X.25 Trace. You can specify the total size of the trace buffer and the length of the each trace entry. Use the following syntax: AT$VX [trace size, entry length], where trace size and entry length are specified in hexadecimal values. For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VX 8000, 100. If you do not specify trace size and length, the default values are used.
S-Register Commands The following five commands apply to S-Registers, which are described further below. ATSn=v S-Register n to Value v. Sets S-Register n to the value v. ATSn Establishes S-Register n as the Selected Register. Sets 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 register. ATSn? Reports the Value of S-Register n. Reports the last value stored into S-Register n.
S-Register Commands Register Description S25 Data Terminal Ready Detection Delay. Specifies the duration that the Data Terminal Ready (DTR) status must either be raised or dropped before being recognized by the DIVA T/A. This delay helps ensure that the DIVA T/A does not interpret a random glitch as a DTR raise or drop. This register affects the AT&Dn command, which controls interpretation of the Data Terminal Ready (DTR) input (see page 37).
Analog Device Commands The following table describes the analog device commands. These commands are only available on units with the optional analog device ports. AT*An=v Abbreviated Ring Control (North America only). Specifies whether Visual Message Waiting's abbreviated ring is enabled or disabled. n=1 Analog device port 1 (PHONE 1). n=2 Analog device port 2 (PHONE 2). v= 0 Disabled. v=1 Enabled (default). AT*Bn=v ISDN Bearer Capability.
Analog Device Commands AT*Fn Analog Device Ring Frequency. Specifies the analog device ring frequency. When n=0, the ring frequency is determined by the country/region selected with the AT*Pn command. n=0 Ring frequency determined by region (AT*Pn) (default). n=1 20 Hz. n=2 25 Hz. n=3 40 Hz. n=4 50 Hz. Note: This parameter does not take effect until you restart your DIV AT/A. AT*Kn=v Analog Device Calling Features (North America only). Specifies the feature key for analog device calling features.
Analog Device Commands AT*Sn=v Disable Analog Device Calling Features. Specifies whether supplementary service is to be disabled. n=1 Analog device port 1 (PHONE 1). n=2 Analog device port 2 (PHONE 2). v=0 Disable. Recommended for modem/fax calls. v=1 Enable with default values (default). The following two options are for advanced users only. v=5 Enable using same terminal endpoint identifier as data port. v=9 Enable using separate terminal endpoint identifier.
Mini-monitor Commands The following commands relate to the Mini-monitor. They are all case sensitive. Your Eicon Technology Customer Services representative may ask you to use these commands. at@dump Dump Memory. Produces a memory dump using XMODEM. Note: This command needs a terminal emulation program that supports XMODEM. at@d1 DRAM test. at@d2 Flash test. at@d3 ISDN internal loop back test. at@d4 ISDN external loop back test. at@fail Simulate a fault. at@load Load New Firmware.
AT Command Result Codes This section provides the result codes, also known as status messages, that 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 response). Word messages are preceded and terminated by the sequence . Numeric codes are terminated by only. The Result Code Format command (ATVn) determines short- or long-form usage.
AT Command Result Codes DCE Speed means different things for different applications. For Digital calls, it is the bitrate obtained by summing all ISDN B-channels available to the protocol. For a V.110 call, it is the V.110 user rate and not the intermediate rate of the B-channel. For Modem over ISDN, it is the speed of the V.34 carrier. DTE Speed is the speed used between the PC and the T/A (default configured or last speed detected by the auto-bauding process). Some non-standard speeds (e.g.
AT Command Result Codes Code Word Message 54 CARRIER 19200 CONNECT 19200 55 CARRIER 21600 CONNECT 21600 56 CARRIER 24000 CONNECT 24000 57 CARRIER 56000 CONNECT 56000 58 CARRIER 28800 CONNECT 28800 59 CARRIER 64000 CONNECT 64000 60 CARRIER 128000 CONNECT 128000 61 CARRIER 26400 CONNECT 26400 62 CARRIER 31200 CONNECT 31200 63 CARRIER 33600 CONNECT 33600 64 CARRIER 75T/1200R CONNECT 75T/1200R 65 CARRIER 1200T/75R CONNECT 1200T/75R 66 CARRIER 112000 CONNECT 112000 67 CARRIER 38400
Index A H Alphabetical list of supported AT commands, 17 Always On / Dynamic ISDN (AO/DI), 12 Analog commands, 59 AO/DI commands, 49 AT commands Alphabetical list, 17 Analog, 59 AO/DI, 49 AT!, 18 AT$ (utility), 27 AT%, 20 AT&, 21 AT*, 22 AT>, 23 AT@ , 24 Call control, 39 COM port configuration, 36 General, 29 Group list, 16 ISDN configuration, 31 Mini-monitor, 28, 62 Multilink PPP, 46 Other, 25 Profile, 45 Result codes, 63 S-Register, 57 S-Registers, 26 Syntax conventions, 14 Utility, 54 V.110, 44 V.
