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Data Addendum
June 15, 1998
Version 1.1
Host-Based Controller Modem AT Command Set
Contents Page Introduction
AT Command Summary ........................................2 This document specifies the Lucent Technologies
AT Commands Reference .....................................6 MTC AT Command Set for the host-based controller
Test and Debug AT Commands ..........................24 modem products. Note that if a particular modem
board does not support a feature (such as voice),
AT Co
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Summary The following tables summarize the commands implemented by the modem. Commands may be executed when the modem is in COMMAND mode. COMMAND mode is entered upon under one of the following conditions: ✟ After power up ✟ At the termination of a connection ✟ After the execution of a command other than dial or answer commands (ATO or AT&T) ✟ Upon the receipt of the ESCAPE SEQUENCE (three consecutive
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Summary (continued) Table 2. AT Testing and Debugging Command Set Summary Command Description Command Description &&C Write to/read from host interface %T94 Test external DSP RAM &&L Line-to-line loopback %T124 Return to on-chip DSP RAM &&R Write to/read from DSP RAM location %T125 Load K56flex image to external DSP RAM &&S Speaker codec loopback #UD Unimodem diagnostics Table 3. The S-Register Summary Register D
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Summary (continued) Table 4. The Result Code Summary Result Code Numeric Description OK 0 Command executed CONNECT 1 Modem connected to line RING 2 A ring signal has been detected NO CARRIER 3 Modem lost carrier signal, or does not detect carrier signal, or does not detect answer tone ERROR 4 Invalid command CONNECT 1200 EC* 5 Connection at 1200 bit/s NO DIALTONE 6 No dial tone detected BUSY 7 Busy signa
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Summary (continued) Result Code Numeric Description CONNECT 29333 EC* 101 Connection at 29333 bit/s (V.90 mode) CONNECT 30666 EC* 102 Connection at 30666 bit/s (V.90 mode) CONNECT 33333 EC* 103 Connection at 33333 bit/s (V.90 mode) CONNECT 34666 EC* 104 Connection at 34666 bit/s (V.90 mode) CONNECT 37333 EC* 105 Connection at 37333 bit/s (V.90 mode) CONNECT 38666 EC* 106 Connection at 38666 bit/s (V.90 mode) CONNEC
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Commands Reference AT commands are issued to the modem to control the modem's operation and software configuration. AT commands can only be entered while the modem is in command mode. The format for entering AT commands is: TYPE: ATXn where X is the AT command and n is the specific value for that command. PRESS: Enter If n is omitted from a command that takes a parameter valu, the value 0 I(zero) is assumed. Any co
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Reference (continued) Dn Dial This command instructs the modem to begin the dialing sequence. The dial string (n, including modifiers and the telephone number) is entered after the ATD command. A dial string can be up to 60 characters long. Any digit or symbol (0─ 9, *, #, A, B, C, D) may be dialed as touch- tone digits. Characters such as spaces, hyphens, and parentheses do not count─ they are ignored by the mo
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Reference (continued) OK n = 1 ERROR Otherwise Hn Hook Control This command instructs the modem to go on-hook to disconnect a call, or off-hook to make the phone line busy. H0: Modem goes on-hook (default). H1: Modem goes off-hook. Result Codes: OK n = 0, 1 ERROR Otherwise In Request ID Information This command displays specific product information about the modem. I0: Returns modem identity string and dri
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Reference (continued) The ATI11 result has two pages; the user must hit a key to get the second page. See the following example: ati11 Description K56flex connection V.90 Connection --------------- ------------------ --------------- 1 Last Connection 56K V.90 2 Initial Transmit Carrier Rate 28800 28800 3 Initial Receive
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Reference (continued) 20. Reason for call ending, only valid after call ends: 0 = Local modem command: ATH, DTR drop 1 = Remote modem: cleardown, loss of signal 2 = No answer, busy, etc. 3 = Training failure V.90, K56flex or V.34. 4 = Protocol failure if required by \N4, for example. 21. For PCM connection only, a hexadecimal 6-bit pattern of T1 frames with robbed-bit signaling. 22. For PCM connection only
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Reference (continued) On Return On-line to Data Mode O0: Instructs the modem to exit on-line command mode and return to data mode (see AT Escape Sequence, +++). O1: This command issues a retrain before returning to on-line data mode. O3: This command issues a rate renegotiation before returning to on-line data mode. Result Codes: OK n = 0, 1, 3 ERROR Otherwise P Select Pulse Dialing This command configures the mode
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Reference (continued) Wn Result Code Option W0: CONNECT result code reports DTE receive speed. Disable protocol result codes. W1: CONNECT result code reports DTE receive speed. Enable protocol result codes. W2: CONNECT result code reports DCE receive speed. Enable protocol result codes (default). Result Codes: OK n = 0, 1, 2 ERROR Otherwise Xn Result Code Selection and Call Progress Monitoring This command
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Reference (continued) Yn Long Space Disconnect Long space disconnect is always disabled. Y0: Disable long space disconnect (default). Y1: Enable long space disconnect (NOT SUPPORTED). Result Codes: OK n = 0 ERROR Otherwise Zn Recall Stored Profile This command instructs the modem chip set to go on-hook and restore the profile saved by the last &W command. Either Z0 or Z1 restores the same single profile. Result C
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Reference (continued) &Dn DTR Control This command interprets how the modem responds to the state of the DTR signal and changes to the DTR signal. &D0: Ignore. The modem ignores the true status of DTR and treats it as always on. This should only be used if your computer does not provide DTR to the modem. &D1: If the DTR signal is not detected while in on-line data mode, the modem enters command mode, issu
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Reference (continued) &Kn Local Flow Control Selection &K0: Disable flow control &K1: Reserved &K2: Reserved &K3: Enable RTS/CTS (hardware) flow control (default) &K4: Enable XON/XOFF flow control Result Codes: OK n = 0, 3, 4 ERROR Otherwise &Mn Asynchronous Communications Mode &M0: Asynchronous mode (default). &M1: Reserved &M2: Reserved &M3: Reserved &M4: Reserved Result Codes: OK n = 0 ERROR Otherwise &Pn Pulse
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Reference (continued) &Sn Data Set Ready (DSR) Option This command selects DSR action. &S0: DSR always ON (default). &S1: DSR comes on when establishing a connection and goes off when the connection ends. Result Codes: OK n = 0, 1 ERROR Otherwise &Tn Self-Test Commands This command allows the user to perform diagnostic tests on the modem. These tests can help to isolate problems when experiencing periodi
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Reference (continued) &V View Active Configuration and Stored Profile This command is used to display the active profiles. For example: Option Selection AT Cmd Comm Standard Bell B CommandCharEcho Enabled E Speaker Volume Medium L Speaker Control OnUntilCarrier M Result Codes Enabled Q Dialer Type Tone T/P ResultCode Form Text V ExtendResultCode Enabled X Dial Tone Detect Enabled X Busy Tone Detect Enabled X LSD Ac
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Reference (continued) &Wn Store Current Configuration This command stores certain command options and S-register values except S3, S4, and S5. The ATZ command or a power-up reset of the modem restores this profile. Result Codes: OK n = 0 ERROR Otherwise &Yn Select Stored Profile for Hard Reset This command does not change the behavior of the modem but is included for compatibility with applications that i
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Data Addendum Host-Based Controller Modem June 15, 1998 AT Command Set AT Command Reference (continued) \J Bits/s Rate Adjusted This command determines whether or not the negotiated connect speed of the modem forces the adjustment of the speed of the DTE to the modem’s speed. \J0: Buffer mode. Error control selected (or not) by \Nn command (default). \J1: Force the max DCE rate to the DTE rate. Result Codes: OK n = 0 or 1 ERROR Otherwise \Kn Break Control Controls the response of the modem to a
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Host-Based Controller Modem Data Addendum AT Command Set June 15, 1998 AT Command Reference (continued) \N3: V.42, MNP, or buffer (default). The modem attempts to connect in V.42 error control mode. If this fails, the modem attempts to connect in MNP mode. If this fails, the modem connects in buffer mode and continues operation. This is also known as V.42/MNP auto reliable mode (same as &Q5). \N4: V.42 or disconnect. The modem attempts to connect in V.42 error control mode. If this fa
