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®
MultiModem II
MT5600BA-V92
MT5600BR-V92
MT5656ZDX
MT5656ZDXV
AT Commands
Reference Guide
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Copyright and Technical Support AT Commands Reference Guide Products: MT5600BA-V92, MT5600BR-V92, MT5656ZDX, MT5656ZDX-V PN S000273G Copyright All rights reserved. This publication may not be reproduced. Copyright © 2002–2009 by Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore,
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Table of Contents Table of Contents Chapter 1 – Introduction .............................................................................................................................................. 4 Chapter 2 – AT Commands ......................................................................................................................................... 5 General Commands ................................................................................................
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Chapter 1 – Introduction Chapter 1 – Introduction AT commands are used to control the operation of your modem. They are so called because each command must be preceded by the characters AT to get the ATtention of the modem. AT commands can be issued only when the modem is in command mode or online command mode. • The modem is in command mode whenever it is not connected to another modem. • The modem is in data mode whenever it is connected to another modem and ready to exch
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Chapter 2 – AT Commands Chapter 2 – AT Commands General Commands Command: AT Attention Code Values: n/a Description: The attention code precedes all command lines except A/ and the escape sequence. Command: Enter Key Values: na Description: Press the ENTER or RETURN key to execute most commands. Command: A Answer Values: na Description: Answers an incoming call before the final ring. Command: A/ Repeat Last Command Values: n/a Description: Repeats the
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Chapter 2 – AT Commands Command: DS=n Dial Stored Telephone Number Values: n = 0–3 Default: none Description: Dials a number previously stored in directory number n by the &Zn=x command. Example: ATDS=3. Command: En Echo Command Mode Characters Values: n = 0 or 1 Default: 1 Description: E0 Does not echo keyboard input to the terminal. E1 Does echo keyboard input to the terminal. Command: Hn Hook Control Values: n = 0 or 1 Default: 0 Description: H0 Goe
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Chapter 2 – AT Commands Command: Qn Result Codes Enable/Disable Values: n = 0 or 1 Default: 0 Description: Q0 Enables result codes. Q1 Disables result codes Command: Sr Select Register Values: r is the S-Register number Default: None Description: Selects register Sr as the last register accessed; e.g., S0. The command AT? can then be used to read the register, and the command AT=n can then be used to set the register to value n. Command: Sr=n Set Register
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Chapter 2 – AT Commands Command: Yn Long Space Disconnect Note: For use with MT5600BA and MT5600BR only. Values: n = 0 or 1 Default: 0 Description: Y0 Disables sending/responding to a long space break signal on disconnect. Y1 Enables long space disconnect. In non-error correction mode, the modem sends a long space of four seconds prior to going on-hook. In non-error correction mode, the modem responds to the receipt of a long space (i.e., a break signal greater than 1.6 sec
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Chapter 2 – AT Commands Command: &En Modem-Initiated Flow Control Note: For use with MT5600BA and MT5600BR only. Values: n = 3, 4, or 5 Default: 4 Description: &E3 Flow control disabled. &E4 CTS/RTS hardware flow control. &E5 XON/XOFF software flow control. Note: See also the L5 and &K commands. Command: &En V.42bis Data Compression Note: For use with MT5600BA and MT5600BR only. Values: n = 14 or 15 Default: 15 Description: &E14 V.42bis data compression
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Chapter 2 – AT Commands Command: &Pn Make/Break Dial Ratio Values: n = 0, 1, 2,3 Default: Varies by country/region Description: &P0 Make/Break dial ratio of 39/61 at 10 pps &P1 Make/Break dial ratio of 33/67 at 10 pps &P2 Make/Break dial ratio of 39/61 at 20 pps &P3 Make/Break dial ratio of 33/67 at 20 pps Command: &Qn Sync/Async Mode Note: The MT5600ZDX does not support Sync mode. Values: n =0-3, 5, 6 Default: 5 Description: This command is an extension o
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Chapter 2 – AT Commands Command: &Wn Store Current Configuration Values: n= 0 or 1 Default: None Description: &W0 Stores current modem settings in nonvolatile memory as Profile 0. Profile 0 is loaded instead of the factory defaults at power-on (if &Y0 is set) and by the ATZ command. &W1 Stores current modem settings in nonvolatile memory as Profile 1. Profile 1 is loaded instead of the factory defaults at power-on (if &Y1 is set) and by the ATZ1 command. Note: See also the Z, &F
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Chapter 2 – AT Commands Command: %En Line Quality Monitor Values: n = 0, 1, or 2 Default: 2 Description: Controls whether or not the modem will automatically monitor the line quality and request a retrain (%E1) or fall back to a lower speed when line quality is insufficient and fall forward to a faster speed when line quality is sufficient (%E2). %E0 Disables line quality monitor and auto-retrain. %E1 Enables line quality monitor and auto-retrain. %E2 Enables line qualit
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Chapter 2 – AT Commands Command: \Kn Break Control Values: n = 0–5 Default: 5 Description: Controls the response of the modem to a break received from the computer, the remote modem, or the \B command. The response is different for each of three different states. Data mode. The modem receives the break from the computer: \K0 Enter online command mode; no break sent to the remote modem. \K1 Clear data buffers and send break to the remote modem. \K2 Same as \K0. \K3 Send bre
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Chapter 2 – AT Commands Command: +GCI Country/Region of Installation Description: This extended syntax command selects and indicates the region/country of installation for the modem. The parameter selects the settings for any operational parameters that need to be adjusted for national regulations or telephone networks. Syntax: +GCI=Defined Values: Example: Euro/Nam = B5. For a list of regions/countries approvals and codes, see the Multi-Tech Web site at: htt
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Chapter 2 – AT Commands Command: -Kn MNP Extended Services Values: n = 0, 1, or 2 Default: 0 Description: Enables or disables conversion of a V.42 LAPM connection to an MNP 10 connection. -K0 Disables V.42 LAPM to MNP 10 conversion. -K1 Enables V.42 LAPM to MNP 10 conversion. -K2 Enables V.42 LAPM to MNP 10 conversion; inhibits MNP Extended Services initiation during V.42 LAPM answer mode detection phase. Command: ** Flash Memory Download Values: n = 0, 1, or 2 D
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Chapter 2 – AT Commands Escape Commands Command: +++ Escape Sequence Note: Use with MT5600BA and MT5600BR only. Type +++ and wait for OK response. Then issue the following command by typing AT . ( indicates that you must click Enter). Values: n/a Description: Puts the modem in online command mode. Command: *E Escape Remote Configuration Note: Use with MT5600BA and MT5600BR only. Values: n/a Description: Escape Remote Configure Sequence. The remote modem config
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Chapter 2 – AT Commands Modem Connection Commands Command: +PCW=n Call Waiting Enable Values: n = 0, 1, or 2 Default: 2 Description: Controls the action to be taken upon detection of a call waiting tone in V.92 mode. Values specified by this command are not modified when an AT&F command is issued. +PCW=0 Toggles V.24 Circuit 125 and collects Caller ID if enabled by +VCID. +PCW=1 Hangs up. +PCW=2 Ignores V.92 call waiting. +PCW=? Displays the allowed values. +PCW? Dis
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Chapter 2 – AT Commands Command: -QCPC Force Full Startup Procedure Next Connection Description: This command causes the modem to use full startup procedures on the next connection attempt regardless of the setting of the +PQC command. After this attempt, the modem will select the startup procedure as defined by the +PQC command. If a shortened startup procedure is enabled by +PQC, then the quick connect profile will also be updated on the next connection attempt. Syntax: -QCPC Res
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Chapter 2 – AT Commands Caller ID Commands Command: +VCID=n Caller ID Selection Values: n = 0, 1, or 2 Default: 0 Description: Enables Caller ID detection and configures the reporting and presentation of the Caller ID data that is detected after the first ring. The reported data includes the date and time of the call, the caller's name and number, and a message. Set S0=2. +VCID=0 Disables Caller ID. +VCID=1 Enables Caller ID with formatted data. +VCID=2 Enables Caller ID
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Chapter 2 – AT Commands Data Compression Commands Command: +DR Data Compression Reporting Values: 0, 1 Default: 1 Description: This extended-format numeric parameter controls whether or not the extended-format +DR: intermediate result code is transmitted from the modem to the DTE. S95 bit 5 is reset to 0 for +DR=0 and is set to a 1 for +DR=1. The more recent setting of +DR or S95 bit 5, and the W command setting, determines the actual data compression result code reporting (see S95 P
