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Text File | 1996-10-23 | 24KB | 640 lines

Appendix C AT Command Set This appendix includes AT Command reference tables for your CommuniCard modem. Find the AT Command tables that relate to your particular modem (i.e. cellular or non-cellular). AT Commands for Cellular-Ready Modems Syntax: AT__n For example, command &Sn becomes AT&S0 or AT&S1. Basic Modem Commands This table contains an alphabetical list of basic modem commands. Command Definition = Write last accessed S register (AT=nnn) ? Read last accessed S register (AT?) A/ Repeat last command, no 'AT' precedes this command A Go off-hook in ANSWER mode B, B0 CCITT V.22 mode when at 1200bps; V.21 at 300bps B1 Bell 212A mode when at 1200bps; Bell 103 at 300 bps C1 Normal TX carrier switching (responds OK); has no effect, for Hayes compatibility D Dial number that follows D in command line L redial last number P Pulse dialing T Tone dialing R Accepted, but ignored S7 @ Wait for silence, 5 seconds , Pause for time in S8 ; Return to command state 14 Command Definition E1 Enable character echo to terminal in command mode F, F0 (V.32bis only) Select Line Modulation, Auto-detect mode, connect at highest speed. See N command, and S37 register F1 (V.32bis only) 300 Baud Carrier, either V.21 or Bell 103 set by B command F2 (V.32bis only) Reserved F3 (V.32bis only) V.23 Line Carrier, Originate = 75 Bps, Answer = 1200 Bps F4 (V.32bis only) 1200 Baud Carrier, either V.22 or Bell 212 set by B command F5 (V.32bis only) 2400 Baud Carrier, V.22 bis F6 (V.32bis only) 4800 Baud Carrier, V.32bis or V.32 according to modem capabilities F7 (V.32bis only) 7200 Baud Carrier, V.32bis at 7200 F8 (V.32bis only) 9600 Baud Carrier, V.32 or V.32bis according to modem capabilities F9 (V.32bis only) 12000 Baud Carrier, V.32bis F10 (V.32bis only) 14400 Baud Carrier, V.32bis H0 Go on-hook (hang up) H1 Go off-hook, enter command mode, and wait for the period of time specified by Register S7 I, I0 Display product ID code I1 Returns the checksum value of ROM or an "OK" message I2 Return OK/ERROR on RAM checksum I3 Return Firmware Revision I4 Return Manufacturer's test string I5 Return Country Code I6 Return Data Pump type L, L0 Lowest speaker volume L1 Low speaker volume L2 Medium speaker volume L3 High speaker volume 15 Command Definition M, M0 Speaker off M1 Speaker on until carrier detect M2 Speaker always on M3 Speaker on only while answering N, N0 Connection speed set to that set in S37; if S37=0, DCE rate equals last DTE rate, or AT command N1 Connection speed set to highest possible DCE rate, Automode O, O0 Return to on-line data mode from on-line command mode O1 Go on-line and initiate retrain (2400 bps or higher) P Pulse dialing Q, Q0 Modem returns result codes (Quiet disabled) Q1 Modem does not return result codes (Quiet enabled) Sr Select 'r' to be the default S Register Sr=n Set register 'r' to value 'n' Sr? Show value in register 'r' T Tone Dialing V, V0 Short form result codes (Verbose disabled) V1 Full-word result codes (Verbose enabled) W0 Negotiation progress codes disabled. Result code is DTE rate. W1 Negotiation progress codes enabled. \V setting is ignored. Hayes 4 line format, Carrier, Protocol, Compression, DTE *rate. W2 Negotiation progress codes disabled. Result code is DCE rate. X, X0 Smartmodem 300 compatible; CONNECT result code enabled. X1 Modem ignores dialtone and busy, CONNECT nnnn result code enabled X2 Modem ignores busy, CONNECT nnnn result code enabled. X3 Modem ignores dialtone, CONNECT nnnn result code enabled. 16 Command Definition X4 Modem recognizes dialtone and busy, CONNECT nnnn result code enabled. Y, Y0 Disable long-space disconnect Y1 Enable long-space disconnect Z, Z0 Reset modem and recall User Profile 0 Z1 Reset modem and recall User Profile 1 Z2 Reset modem and recall User Profile 2 & Commands This table contains commands that begin with "&" as indicated. Command Definition &C, &C0 Carrier always ON, DCD &C1 Carrier Detect follows data carrier &D, &D0 Modem ignores DTR &D1 Go to command mode on ON-to-Off DTR transition &D2 Hang up & go to command mode on On-to-Off DTR transition. DTR off does not allow an incoming call. &D3 Reset (ATZ) on On-to-Off DTR transition, causes modem to Hang up &D4 Deliver all buffered data before disconnecting on On-to-Off transition of DTR, S21 = &D2, S38 = 255 (send all data) &E0 Disable auto retrain. See %E &E1 Enable auto retrain, Fall back. See %E1 &E2 Enable Fall Back, Fall Forward. See %E2 &F, &F0 Recall factory settings as active configuration. Error Correction Mode, V.42bis Configuration=>MNP=>Async &F1 Recall second factory settings as active: MNP format=>Async &F2 Recall third factory settings as active, Async modem Standard modem with no error correction protocols. &G, &G0 No guard tones &G1 550 Hz guard tone 17 Command Definition &G2 1800 Hz guard tone &K0 Flow control is off &K3 Hardware flow control (RTS/CTS) &K4 XON/XOFF flow control &K5 Transparent XON/XOFF flow control &K6 Hardware and XON/XOFF flow control &M0 Asynchronous mode, See &Q0 &M1, M2, M3 See &Q1, Q2, Q3 Sync mode (ignored) &N, &N0 Normal numeric result codes displayed, Hayes format &N1 Microcom QX/4232hs-compatible numeric result codes displayed &N2 Rockwell numeric result codes displayed. Also allows forced messages enabled in S95 &P, &P0 Pulse dial make-break 39%/61%, 10 pulses per second. &P1 Pulse dial make-break 33%/67%, 10 pulses per second. &P2 Pulse dial make-break 39%/61%, 20 pulses per second. &P3 Pulse dial make-break 33%/67%, 20 pulses per second. &Q0 Asynchronous mode (same as &M0) &Q1 Synchronous mode 1 (ignored) &Q2 Synchronous mode 2 (ignored) &Q3 Synchronous mode 3 (ignored) &Q4 Hayes AutoSync mode &Q5 Error Correction Mode.V.42=>MNP=>Async (=> = "If previous condition fails, Fallback To") &Q6 Asynchronous Normal mode, Speed buffered &Q7 V.42bis mode =>Async fallback, see \N5 (=> = "If previous condition fails, Fallback To") &R0 CTS follow RTS with S26 delay, per V.25bis Specification &R1 CTS always on, Unless Hardware Flow Control is in effect &S0 DSR is always on &S1 DSR is FALSE until CONNECT 18 Command Definition &T, &T0 Terminate test (precede with +++) &T1 Initiate local analog loopback test (transmit and receive in low channel) &T3 Initiate local digital loopback test &T4 Grant request from remote for remote digital loopback test &T5 Deny request from remote for remote digital loopback test &T6 Initiate remote digital loopback test &T7 Initiate remote digital loopback with self-test &T8 Initiate local analog loopback with self-test &U0 Data compression disabled. (See %C0) &U1 Data compression enabled. (See %C0) &V View active configuration, profiles, (0,1), and numbers &W, &W0 Save active configuration as User Profile 0. &W1 Save active configuration as User Profile 1. &W2 Save active configuration as User Profile 2. (Cellular) &Y, &Y0 Recall User Profile 0 on power-up &Y1 Recall User Profile 1 on power-up &Y2 Recall User Profile 2 on power-up &Zn=x Store phone number 'x' in directory entry 'n' (n = 0...3, x = 36 character max) 19 \ Commands This table contains commands that begin with "\" as indicated. Command Definition \A,\A0 Maximum MNP block size = 64 characters \A1 Maximum MNP block size = 128 characters \A2 Maximum MNP block size = 192 characters \A3 Maximum MNP block size = 256 characters \Bn Send a n*100 msec. BREAK to remote; default is 300msec. n = 0...9 \G, \G0 Disable port flow control DCE to DCE \J,\J0 (V32.bis only) Disable port rate adjust. Serial port is independent of the connection. NORMAL connection. \J1 (V32.bis only) Enable port rate adjust. After a connection is made, the serial port adjusts to the rate of the connection. Same as a DIRECT connection. \G1 Enable port XON/XOFF flow control, DCE to DCE The following \K commands have three different modes for each command: Mode 1 = BREAK character received while modem is in data transfer mode Mode 2 = Modem is in On-line command state during a data connection and BREAK character is received from DTE. \K,\K0 Mode 1: Enter command mode, do not transmit BREAK Mode 2: Purge buffers and transmit BREAK Mode 3: Purge buffers, relay BREAK to DTE \K1 Mode 1: BREAK from DTE=Purge buffers, transmit BREAK Mode 2: BREAK Command=Purge buffers and transmit BREAK Mode 3: BREAK from remote=Purge buffers, relay BREAK to DTE \K2 Mode 1: BREAK from DTE=Enter command mode, do not transmit BREAK Mode 2: BREAK Command=Transmit BREAK immediately Mode 3: BREAK from remote=relay BREAK to DTE immediately 20 Command Definition \K3 Mode 1: BREAK from DTE=Transmit BREAK immediately Mode 2: BREAK Command=Transmit BREAK immediately Mode 3: BREAK from remote=relay BREAK to DTE immediately \K4 Mode 1: BREAK from DTE=Enter command mode, do not transmit BREAK Mode 2: BREAK Command=Transmit BREAK in sequence with data Mode 3: BREAK from remote=relay BREAK to DTE in sequence with data \K5 Mode 1: BREAK from DTE=Transmit BREAK in sequence with data Mode 2: BREAK Command=Transmit BREAK in sequence with data Mode 3: BREAK from remote=relay BREAK to DTE in sequence with data \L,\L0 MNP stream link \L1 MNP block link \N,\N0 Set normal mode, no error correction, Speed buffered \N1 Set Direct mode, no error correction, No speed Buffering. DTE speed changed to DCE rate after CONNECT message. NOTE: 7200=9600 rate; 14400, 12000=19200 DTE rate \N2 Set Reliable mode (MNP only) \N3 Set Auto-reliable mode (MNP with fallback to normal) \N4 Set Reliable mode (LAPM only) \N5 Set Auto-reliable mode (LAPM fallback to normal) \N6 Set Reliable mode (LAPM with fallback to MNP) \N7 Set Auto-reliable mode (LAPM with fallback to MNP then to normal) \Q,\Q0 Disable flow control \Q1 Bidirectional XON/XOFF flow control \Q2 Unidirectional hardware flow control \Q3 Bidirectional hardware flow control \Q4 Unidirectional XON/XOFF flow control \Q5 Unidirectional hardware flow control with CTS off until CONNECT 21 Command Definition \Q6 Bidirectional hardware flow control with CTS off until CONNECT \S Display current Configuration, Long Version \Tn Inactivity timer (0-255 minutes) default=0, disabled \V,\V0 Disable /REL connect codes \V1 Enable /REL connect codes \V2 Enable MNP or LAPM connect codes \X,\X0 XON/XOFF pass through disabled \X1 XON/XOFF pass through enabled % Commands This table contains commands that begin with "%" as indicated. Command Definition %Ac Set AUTO RELIABLE fallback character "c". Default value of "c" is 0, which disables this feature. %Bn (V.32bis only) Maximum modem port rate, bps; n=300, 1200, 2400, 4800, 9600; 7200, 12000, 14400 with V.32bis option. %C,%C0 Data compression disabled %C1 Data compression requested (V.42bis in LAPM, MNP5 in MNP) %C2 V.42bis compression only %C3 MNP % compression only %Dn Delay to clear the receive buffer before hang up. n=number of seconds to wait for buffer to clear. same as S38, default=20. If S38=255, the modem will empty all data before hang up. Set to 255 by &D4. %E,%E0 Disable Auto-retrain, See &En %E1 Enable auto-retrain, Fall back %E2 Enable Fall Back, Fall Forward retrain %E3 Enable auto-retrain, but use fast hangup %G0 Disable %Bn, use Fn command, %G1 enables V.32bis only %L Report Line Signal Level, in -DBm %Q Report Line Signal Quality %R Display all S-registers %V Display firmware version 22 * Commands This table contains commands that begin with "*" as indicated. Command Definition *H0 MNP10, Link negotiation occurs at highest speed *H1 Link negotiation occurs at 1200 bps *H2 MNP10, Link negotiation occurs at 4800 bps - Commands This table contains commands that begin with "-" as indicated. Command Definition -B MNP10, Initiate fallback to next lowest speed -C0 MNP10, Class 10 selection, synchronous -C1 MNP10, Class 10 selection, asynchronous -C2 MNP10, Class 3 selection -C3 MNP10, Class 2 selection -J0 Disable V.42 handshake detection phase -J1 Enable V.42 handshake detection phase -K0 MNP10, Disable MNP 10 extended services -K1 MNP10, Enable MNP 10 extended services -K2 MNP10, Enable MNP 10 extended services without MNP indication during answer detect phase. -Q0 MNP10, Enable fallback to 2400 Bps or 1200 Bps -Un MNP10, Initiate fall forward to next highest speed AT Commands for Non-Cellular Modems This section gives you an alphabetic listing of AT Commands. When it is first turned on your CommuniCard modem defaults to a stored profile of settings and values (factory defined profile). You may also create four user-defined profiles to meet your individual needs and store them in the non-volatile memory. Communication software sends an initialization string (series of AT commands) when it begins talking to the modem. This initialization string establishes a known base of modem settings for the software and modem to work with. Should it be necessary, the AT&F command is used to reset the modem to the factory default profiles. 23 After the factory profiles are loaded into the modem's memory and S-registers, the modem can accept commands. You may then change the parameters by changing individual commands or by recalling another user-defined profile. Basic Modem Commands for Non-Cellular Modems This table contains an alphabetical list of basic modem commands. Command Definition A/ Repeat last command A Answer command \An Block size for V.42 %An Set autoreliable fallback character Bn Line modulation options &Bn V.32 auto retrain \Bn Transmit break Cn Carrier control option &Cn Data carrier detect (DCD) option \Cn Set autoreliable buffer %Cn Data compression D Dial command &Dn Data terminal ready (DTR) option En AT command options Fn On-line echo command &Fn Load factory settings &Gn Guard tone option \Gn Set serial port flow control %Gn Auto fall forward/fallback enable Hn Switch hook control "Hn V.42bis compression control In Product ID &Jn Dummy command for autosync \Jn Constant DTE speed option - Jn Set V.42 detect phase &Kn Select flow control \Kn Set break control Ln Speaker volume &Ln Dial up/leased line option Mn Speaker control &Mn Select communication mode Nn Select negotiate handshake \Nn Modem protocol options "Nn V.42bis dictionary size On Go on-line 24 Command Definition "On Select V.42bis Max String Length P Enable pulse dialing &Pn Dial pulse ratio Qn Result code display option &Qn Communications mode option \Qn DTE flow control options &Rn RTS/CTS option Sn Selects an S register Sn? Read an S register Sn=x Write to an S register &Sn Data set ready (DSR) option T Enable tone dialing &Tn Self-test commands \Tn Set inactivity timer &Un Disable trellis coding Vn Result code form &Vn View active configuration/user profiles/telephone numbers \Vn Protocol result code -V Display version Wn Select extended result code &Wn Store active profile Xn Result code set/call progress &Xn Synch transmit clock source option \Xn Set XON/XOFF passthrough Yn Dummy command &Yn Select stored profile on powerup Zn Recall stored profile &Zn=x Store telephone number +FCLASS Service class selection +FTS Stop transmission and pause +FRS Wait for silence +FTM Fax data transmit +FRM Fax data receive +FTH Fax HDLC frame transmit +FRH Fax HDLC frame receive 25 AT Command Listing for Non-Cellular Modems This section provides descriptions of the modem command set in alphabetical order. Normally, it won't be necessary for you to change the default settings. ALL COMMAND DEFAULTS ARE BASED ON ISSUING THE AT&F COMMAND. Command Definition A/ Executes previous command without pressing ENTER. Re-executes the last command stored in the buffer. The A/ command is not preceded by "AT". ATA Answer immediately. Go on-line to answer, forcing the modem off hook in answer mode. The value of register S0 (number of rings the modem is to answer on) does not affect this command. If no carrier is detected within the time specified by register S7, the modem hangs up. AT\ An Sets the maximum block size during an MNP and LAPM connection. This option forces the modem chipset to transmit smaller blocks of data. This command is typically used for poor quality telephone lines. When the modem transmits smaller blocks of data, it can avoid retransmissions thus improving throughput. 0: Max 64 characters 1: Max 128 characters 2: Max 192 characters 3: Max 256 characters AT%An Sets auto-reliable fallback character. Allows the user to specify the character that tells the modem to return (or fallback) from autoreliable (MNP) mode to a normal connection on the answering modem. n = 0-127 (ASCII character) Default: 013 ATBn Communication Standard Option. This command configures the modem to the desired communications standard setting at a particular line speed. 0: Selects CCITT V.22 mode when the modem is at 1200 bps, and CCITT V.21 when the modem is at 300 bps. 1: Selects Bell 212A when the modem is at 1200 bps, and Bell 103 when the modem is at 300 bps. 2: Selects V.23 originate mode receive 1200 bps, transmit 75 bps; answer mode receive 75 bps, transmit 1200 bps. 3: Selects V.23 originate mode receive 75 bps, transmit 1200 bps; answer mode receive 1200 bps, transmit 75 bps. 26 Command Definition AT&Bn V.32 auto retrain. Controls modem action when the threshold set by S108 is encountered. 0: Hang up if threshold reached. 1: Retrain if threshold reached. 2: Do not hang up and do not retrain (i.e., tolerate any line). AT\Bn Transmit break. This command sends a break to the remote modem. It is equivalent to using the <BREAK> key on your terminal. This command can be used if your keyboard does not have a <BREAK> key. \B1-\B9 BREAK length in 100 ms. Default: 0 (BREAK of 300 ms is transmitted). ATCn Carrier control option. Used by some modems to control the transmit carrier. This chipset does not support C0 and will respond in error if this command is given. C1 ensures backward compatibility with communications software by sending the "OK" response. 0: Transmit carrier always off (returns ERROR). 1: Normal transmit carrier switching. AT&Cn Data carrier detect option (async only). Controls how the state of the DCD or RLSD (Receive Line Signal Detect) relates to the carrier from the remote modem. Always use &C1 for Sync mode. 0: State of carrier from remote modem is ignored. RLSD circuit is always on. 1: State of carrier from remote modem is tracked. RLSD circuit reflects the state of carrier. AT\Cn Set auto-reliable buffer. Determines whether the modem chipset buffers the data it receives during link negotiation. 0: Does not buffer data. 1: Buffers data on answering modem for 4 seconds, until 200 characters have been buffered, and then switches to normal mode and the buffered characters are passed to the serial port. If a SYN character is detected, reliable mode is attempted. 2: Does not buffer data on answering modem. Switches to normal mode upon receipt of autoreliable character and passes it to serial port. AT%Cn Data compression. Controls the MNP Class 5. The modem can only perform data compression on an error corrected link. 0: No compression 1: MNP Class 5 compression.