DIAMOND MULTIMEDIA SYSTEMS, INC. SUPRAEXPRESS 288 PNP Card Type Fax, Modem (synchronous/asynchronous) Chip Set Unidentified Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus External Fax Class Class I Data Modulation Protocol Bell 103/212A ITU-T V.21, V.22, V.22bis, V.32, V.32bis, V.34 Rockwell V.FC Fax Modulation Protocol ITU-T V.17, V.27ter, V.29 Error Correction/Compression MNP5, V.42, V.42bis [Image] CONNECTIONS Function Label Function Label Line out/in - Unidentified CN1 DC power CN4 Line in/out - Unidentified CN2 Power switch SW1 RS-232/422 CN3 DIAGNOSTIC LED(S) LED Color Status Condition OH Red On Modem is off-hook OH Red Off Modem is on-hook RD Red On Modem is receiving data RD Red Off Modem is not receiving data SD Red On Modem is transmitting data SD Red Off Modem is not transmitting data PWR Red On Power is on PWR Red Off Power is off SUPPORTED COMMAND SET Basic AT Commands AT, ‘+++’, ‘comma’, A/ A, E, H, L, N, O, P, R, S, T, U, V, W, Y, Z &A, &B, &C, &G, &J, &K, &L, &P, &R, &S, &T, &V, &W, &X, &Y, &Z Extended AT Commands \A, \B, \C, \E, \G, \J, \K, \L, \N, \O, \Q, \T, \U, \V, \W, \X, \Y, \Z %A, %C, %E, %L, %Q, %TT S Registers S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S38, S39, S46, S48, S82, S86, S90, S91, S92, S95, S99, S108, S109, S110, 201 Special Commands "H, "N, "O,-J, )M, :E, +MS?, +MS Note: See MHI Help File for full command documentation. Proprietary AT Command Set ACCEPT MNP RELIABLE MODE Type: Immediate Format: AT [cmds] \U [cmds] Description: Accept remote modem’s request for MNP reliable mode AUTO-FALLBACK/FALL-FORWARD Type: Configuration Format: AT [cmds] %Gn [cmds] Description: Selects auto-fallback/fall-forward Command Function %G0 Auto-fallback/fall-forward disabled %G1 Auto-fallback/fall-forward enabled AUTO-RETRAIN Type: Configuration Format: AT [cmds] %En [cmds] Description: Controls auto-retrain mode Command Function %E0 Auto-retrain disabled %E1 Auto-retrain enabled AUXCTL OUTPUT LINE CONTROL Type: Configuration Format: AT [cmds] %Mn [cmds] Description: Controls AUXCTL output line level Note: Function varies by model Command Function %M0 Line high only while modem in synchronous data mode %M1 Line low only while modem in synchronous data mode BIT-MAPPED REGISTER S14 Format: AT [cmds] S14=n [cmds] Default: Unidentified Range: 0-174 Unit: Bit-mapped Description: Controls echo, result codes and display, dial mode, and answer/originate mode. Bit Value Function 0 0 Not used 1 0 Command echo disabled 1 Command echo enabled 2 0 Result codes enabled 1 Result codes disabled 3 0 Display result codes in numeric format 1 Display result codes in verbose format 4 0 Not used 5 0 Tone dial enabled 1 Pulse dial enabled 6 0 Not used 7 0 Answer mode enabled 1 Originate mode enabled BIT-MAPPED REGISTER S21 Format AT [cmds] S21=n [cmds] Default: 4 Range: 0-253 Unit: Bit-mapped Description: Selects jack type, CTS/DCD/DSR signals, low DTR action, and the long space disconnect function. Bit Value Function 0 0 Selects RJ-11, RJ-41S, or RJ45S jack 1 Selects RJ-12 or RJ-13 jack 1 0 Not used 2 0 CTS forced high 1 CTS follows RTS 4, 3 00 Modem does not respond to DTR 01 Modem hangs-up and sends "OK" result code 10 Modem goes to command mode after DTR goes is off 11 Modem goes to command mode and disconnects (hangs up) after DTR goes off; Auto-Answer is disabled. 5 0 DCD forced high 1 DCD normal 6 0 DSR forced high 1 DSR normal 7 0 Long space disconnect function disabled 1 Long space disconnect function enabled BIT-MAPPED REGISTER S22 Format AT [cmds] S22=n [cmds] Default: 118 Range: 0-127 Unit: Bit-mapped Description: Controls speaker volume and controls, and limits results codes. Bit Value Function 1, 0 00 Low level volume 01 Low level volume 10 Medium level volume 11 High level volume 3, 2 00 Speaker off 01 Speaker off on carrier 10 Speaker always on 11 Speaker on during handshake 6 - 4 000 Basic result codes only enabled 100 Basic and connection speed result codes enabled 101 Basic and connection speed result codes and dialtone detection enabled 110 All result codes except dialtone detection enabled 111 All result codes enabled BIT-MAPPED REGISTER S23 Format AT [cmds] S23=n [cmds] Default: 55 Range: 0-189 Unit: Bit-mapped Description: Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone. Bit Value Function 0 0 Remote digital loopback denied 1 Remote digital loopback allowed 3 - 1 000 Sets serial port speed to 0-300bps 001 Sets serial port speed to 600bps 010 Sets serial port speed to 1200bps 011 Sets serial port speed to 2400bps 100 Sets serial port speed to 4800bps 101 Sets serial port speed to 9600bps 110 Sets serial port speed to 19200bps 5, 4 00 Parity even 01 Not Used 10 Parity odd 11 No Parity 7, 6 00 Guard tone disabled 01 Guard tone 550Hz enabled 10 Guard tone 1800Hz enabled BIT-MAPPED REGISTER S27 Format AT [cmds] S27=n [cmds] Default: 73 Range: 0-11 Unit: Bit-mapped Description: Selects synchronous/asynchronous mode, line type, clock source, and ITU-T/Bell modes. Bit Value Function 3, 1, 000 Asynchronous Direct mode 0 001 Asynchronous off-line command mode and synchronous connect mode 010 Asynchronous off-line command mode - modem 011 autodials first number in directory, then synchronous connect mode. 100 Asynchronous off-line command mode on low DTR, 101 synchronous connect mode on high DTR. 110 Not Used Asynchronous Reliable Mode Asynchronous Normal Mode 2 0 Switched line (PSTN/Dial-up) 1 Leased line 5, 4 00 Modem generates clock 01 DTE generates clock 10 Modem generates clock from the receive carrier signal 6 0 ITU/T mode 1 Bell mode BIT-MAPPED REGISTER S28 Format AT [cmds] S28=n [cmds] Default: Unidentified Range: 0-31 Unit: Bit-mapped Description: Controls V.23 split speed, transmit/receive speed, half duplex; and pulse dialing. Bit Value Function 0 0 V.23 split speed operation disabled 1 V.23 split speed operation enabled 1 0 75bps transmit, 1200bps receive enabled 1 1200bps transmit, 75bps receive enabled 2 0 V.23 half-duplex disabled 1 1200bps transmit, 1200bps receive enabled 4, 3 00 39ms make/61ms break at 10pps 01 33ms make/67ms break at 10pps 10 39ms make/61ms break at 20pps 11 33ms make/67ms break at 20pps BIT-MAPPED REGISTER S31 Format: AT [cmds] S31=n [cmds] Default: 2 Range: 0-10 Description: Select automode and extended result code format. Bit Value Function 0 0 Not used 1 0 Auto-mode disabled 1 Auto-mode ensabled 3, 2 00 Enables CONNECT result codes to report DTE speed 01 Full reporting of CONNECT result codes 10 Enables CONNECT result codes to report DCE speed BIT-MAPPED REGISTER S40 Format AT [cmds] S40=n [cmds] Default: Unidentified Range: 0-239 Unit: Bit-mapped Description: Controls power level and break handling; selects MNP extended services, link negotiation, and block size. Bit Value Function 0 0 V.42 LAPM to MNP 10 connection disabled 1 V.42 LAPM to MNP 10 connection enabled 1 0 Power level adjustment disabled 1 Power level adjustment enabled 2 0 Link will be negotiated at highest possible speed 1 Link will be negotiated at 1200bps 5, 4, 3 000 \K0 001 \K1 010 \K2 011 \K3 100 \K4 101 \K5 7, 6 00 MNP block size is 64 characters 01 MNP block size is 128 characters 10 MNP block size is 192 characters 11 MNP block size is 256 characters BIT-MAPPED REGISTER S41 Format AT [cmds] S41=n [cmds] Default: Unidentified Range: 0-31 Unit: Bit-mapped Description: Selects compression, auto-retrain, flow control, and MNP mode. Bit Value Function 1 - 0 00 Data compression disabled 01 MNP5 enabled 10 V.42bis enabled 11 MNP5 and V.42bis enabled 2 0 Auto-retrain disabled 1 Auto-retrain enabled 3 0 Flow control disabled 1 Flow control enabled 4 0 Stream mode for MNP 1 Block mode for MNP BREAK SEND Type: Configuration Format: AT [cmds] \Bn [cmds] Default: Unidentified Range: 1-9 Unit: .1 second Description: Sends break to modem in non-error correction state BREAK TYPE Type: Configuration Format: AT [cmds] \Kn [cmds] Description: Configures action of break signal Command Break from DTE Modem receives Break received \B from remote modem \K0 Online command Break sent to Buffers cleared, mode enabled, remote modem and break sent to DTE send no break buffers cleared to remote modem \K1 Break sent to Break sent to Buffers cleared, remote modem remote modem and break sent to DTE and buffers buffers cleared cleared \K2 Online command Send break to Break sent mode enabled, remote modem immediately to send no break immediately DTE to remote modem \K3 Send break to Send break to Break sent remote modem remote modem immediately to immediately immediately DTE \K4 Online command Send break with Break sent with mode enabled, transmitted data received data to send no break the DTE to remote modem \K5 Send break with Send break with Break sent with transmitted transmitted data received data to data the DTE BUSY DETECT WATERMARK Type: Register Format: AT [cmds] SCn=x [cmds] Description: Sets the way the modem accepts a busy signal by FCC specifications Command Value Function SC0=x 30 Minimum BUSY ON Time SC1=x 0 Minimum BUSY ON Time SC2=x 75 Maximum BUSY ON Time SC3=x 0 Maximum BUSY ON Time SC4=x 30 Minimum BUSY OFF Time SC5=x 0 Minimum BUSY OFF Time SC6=x 75 Maximum BUSY OFF Time SC7=x 0 Maximum BUSY OFF Time Note: Each register "pair" holds the value for each setting. To set a value, divide the setting by 256. The integer goes in the second register, while the remained goes in the first. (A setting of 516 would convert to 2 Remainder 4, and could be set by sending ATSC0=4SC1=2 to the modem.) Settings are in 1/100ths of a second. Setting SC0=25 & SC4=25 allows FAST BUSY to also be detected as BUSY. BUSY PULSES Type: Register Format AT [cmds] SC8=n [cmds] Default: 4 Range: Unidentified Unit: 1 pulse Description: Set number of valid BUSY Pulses before reporting BUSY CALLER ID Type: Configuration Format: AT [cmds] #CID=n [cmds] Description: Controls the Caller ID function Command Function #CID? Displays current Caller ID mode #CID=? Returns Caller ID modes supported #CID=0 Caller ID disabled #CID=1 Caller ID displays formatted data #CID=2 Caller ID displays raw hexadecimal data CARRIER CONTROL SELECTION Type: Configuration Format: AT [cmds] C1 [cmds] Description: Provided for backward compatibility only. Does nothing but return "OK" COMMUNICATIONS MODE Type: Configuration Format: AT [cmds] &Mn [cmds] Description: Selects communications mode Note: Same function as &Q(0-3) settings. Command Mode &M0 Asynchronous Direct mode &M1 Asynchronous off-line command mode and synchronous connect mode. &M2 Asynchronous off-line command mode - modem autodials first number in directory, then synchronous connect mode. &M3 Asynchronous off-line command mode on low DTR, synchronous connect mode on high DTR. COMMUNICATIONS MODE Type: Configuration Format: AT [cmds] &Qn [cmds] Description: Selects communications mode options Command Mode &Q0 Asynchronous Direct mode &Q1 Asynchronous off-line command mode and synchronous connect mode. &Q2 Asynchronous off-line command mode - modem autodials first number in directory, then synchronous connect mode. &Q3 Asynchronous off-line command mode on low DTR, synchronous connect mode on high DTR. &Q4 Not Used &Q5 Asynchronous Reliable Mode &Q6 Asynchronous Normal Mode &Q7 Not used &Q8 Asynchronous Reliable Mode w/o v.42/v.42bis &Q9 Asynchronous Reliable Mode w/o MNP 2-5 Note: Be VERY careful when issuing these commands! Once you enter &Q(1-3) and save it to memory, there are only two known ways to return to Asynchronous Mode: 1. Issue AT &Q(0,5-9) &W from a Synchronous Terminal to restore the modem to Asynchronous Mode. 2. Connect modem to an Asynchronous Terminal with the DTR signal (line 20) disabled (a "break-out" box works very nicely for this) and issue the configuration you want or AT &Q(0,5-9) &W to return the modem to Asynchronous Mode. COMMUNICATION PROTOCOLS Type: Configuration Format: AT [cmds] Bn [cmds] Description: Selects the communication protocol for data calls Note: The B command allows the simultaneous selection of more than one suffix, enabling multiple protocols. Command Function B0 V.21 (1200bps) and/or V.22 (1200 bps) B1 Bell 103 (300 bps)Band/or Bell 212A (1200 bps) B15 V.21 (300 bps) only B16 Bell 103 (300 bps) only COMPRESSION Type: Configuration Format: AT [cmds] %Cn [cmds] Description: Selects data compression Command Function %C0 Data compression disabled %C1 MNP5 enabled %C2 V.42bis enabled %C3 MNP5 and V.42bis enabled CONNECT MODE Type: Configuration Format: AT [cmds] \Nn [cmds] Description: Controls the type of connection the modem will operate in Command Function \N0 Normal mode enabled \N1 Direct mode enabled \N2 MNP reliable mode enabled \N3 Auto-reliable mode enabled Note: To force LAPM only connections use AT\N3S36=0 CONVERT TO MNP RELIABLE MODE Type: Immediate Format: AT [cmds] \Y [cmds] Description: Converts to MNP reliable mode from normal or direct mode DATA TERMINAL READY (DTR) Type: Configuration Format: AT [cmds] &Dn [cmds] Description: Selects modem response to DTR Note: The action each variant of &D causes depends on the setting of &Q &Q Setting &D0 &D1 &D2 &D3 &Q0, &Q5, &Q6, NONE Command 2 Command 3 Command 4 &Q8, &Q9 &Q1 Command 0 Command 2 Command 3 Command 4 &Q2 Command 3 Command 3 Command 3 Command 3 &Q3 Command 3 Command 3 Command 3 Command 3 &Q4 Command 1 Command 2 Command 3 Command 4 Command Function Command 0 Modem does not respond to DTR Command 1 Modem hangs-up and sends "OK" result code Command 2 Modem goes to command mode after DTR goes is off Command 3 Modem goes to command mode and disconnects (hangs up) after DTR goes off; Auto-Answer is disabled. Command 4 Modem is initialized after DTR goes off DIAL Type: Immediate Format: AT [cmds] D<#> [cmds] Description: Dials telephone number according to any modifiers included in the string Note: Any combination of modifiers can be used to produce the desired dial functions in sequence. Command Function - ( ) i These symbols and spaces are ignored J Do MNP 10 link negotiation at highest rate (this call only, see *H) K Enable power level adj. during MNP 10 link neg. (this call only, see Mn) L Dial the last dialing string (limitted to the first 40 characters). P Pulse dial the following digits R Dial with answer rather than originate carrier. (Some models accept, but do not support, this command.) Normal Mode: Calling Side: ATDTn Answering Side: ATA Reverse Mode: Calling Side: ATDTnR Answering Side: ATXD Sn Dial stored in non-volitile memory location n. n=0-3 T Tone dial enabled W Wait for second dialtone * DTMF code for "star" # DTMF code for "gate" @ Wait for quiet answer, a 5 second silence. , Pause before finishing dial string, time set in S8. ! Hook flash, go on-hook for time set in S29. ^ Enabled 1300Hz call originating pulse ; Return to command state after dialing > Generate a grounding pulse on the EARTH relay output. If country code setting supports it. DISPLAY STORED NUMBER Type: Immediate Format: AT [cmds] \F [cmds] Description: Display telephone directory stored in non-volatile memory DTR CHANGE THRESHOLD Type: Register Format AT [cmds] S25=n [cmds] Default: 5 Range: 0-255 Unit: .01 second Description: Sets maximum time a change in the DTR signal will be ignored ECHO DATA Type: Configuration Format: AT [cmds] \En [cmds] Description: Enables modem to echo received data Note: Accepted, but not functional on some models Command Function \E1 One shot that minimizes local echo to try to match local network ECHOPLEX VALIDITY Type: Configuration Format: AT [cmds] Fn [cmds] Description: Selects whether commands sent while in data mode are echoed Note: This command is only supported on older modems. Command Function F0 Not Supported (Returns "ERROR") F1 Provided for backward compatibility only. (Returns "OK") FACTORY DEFAULT PROFILE Type: Configuration Format: AT [cmds] &F [cmds] Description: Sets values in active profile to values found in the default profile Command Function &F0 No flow control, No error correction, No data compression &F1 MAC hardware flow control, correction & compression active &F2 Hardware flow control, correction & compression active FLASH DIAL MODIFIER TIME Type: Register Format AT [cmds] S29=n [cmds] Default: 7 Range: 0-255 Unit: .1 second Description: Time the modem will go on-hook upon receiving the ! dial modifier in dial string. FLOW CONTROL Type: Configuration Format: AT [cmds] \Gn [cmds] Description: Selects modem port flow control for Normal and Direct modes Command Function \G0 Flow control disabled \G1 Flow control enabled FLOW CONTROL CHARACTER - XON Type: Register Format: AT [cmds] S32=n [cmds] Default: 17 Range: 0-255 Unit: ASCII Description: Sets the character used to represent XON FLOW CONTROL CHARACTER - XOFF Type: Register Format: AT [cmds] S33=n [cmds] Default: 19 Range: 0-255 Unit: ASCII Description: Sets the character used to represent XOFF INACTIVITY TIMER Type: Configuration Format: AT [cmds] \Tn [cmds] Default: 0 Range: 0-42 Unit: 1 second Description: Sets the length of time that the modem does not receive information before it disconnects. \T=0 will disable timer INACTIVITY TIMER Type: Register Format AT [cmds] S30=n [cmds] Default: 0 Range: 0-255 Unit: 10 seconds Description: Maximum duration of DTE and DCE inactivity allowed prior to initiating hang-up process. Note: S30=0 disables the timer and allows indefinite inactivity. In Reliable mode any data transfer resets timer. In Normal mode only sent data resets timer. INITIATE MNP RELIABLE MODE Type: Immediate Format: AT [cmds] \O [cmds] Description: Initiates MNP reliable mode from normal or direct mode LINE SELECT MODULATION Type: Configuration Format: AT [cmds] Fn [cmds] Description: Selects the speed/protocol the modem will operate in Note: Use either ATFn or a combination of ATS37=n and ATN0, but DO NOT try to USE BOTH at the same time. Command Function F0 AutoMode Selection (try rates in order from fast to slow). F1 300 bps only (protocol according to Bn setting) F2 Not Used (return "OK") F3 v.23 only 75TX/1200RX (originate) or 1200TX/75RX (answer) F4 1200 bps only (protocol according to Bn setting) F5 2400 bps only (v.22bis) F6 4800 bps only (v.32/v.32bis) F7 7200 bps only (v.32bis) F8 9600 bps only (v.32/v.32bis) F9 12000 bps only (v.32bis) F10 14400 bps only (v.32bis) LINE SIGNAL LEVEL Type: Immediate Format AT [cmds] %L [cmds] Default: Unidnetified Range: 9-43 Unit: -dBm Description: Returns a value which indicates the received line signal level LINE SIGNAL QUALITY Type: Immediate Format AT [cmds] %Q [cmds] Default: Unidentified Range: 0-127 Unit: Unidentified Description: Returns a value which indicates line signal quality LOCK SERIAL PORT Type: Configuration Format: AT [cmds] \Jn [cmds] Description: Sets operation of serial port speed Command Function \J0 Serial speed locked \J1 Serial speed follows connect speed MAXIMUM BLOCK SIZE FOR TRANSMISSION Type: Configuration Format: AT [cmds] \An [cmds] Description: Sets the maximum transmittable block size Command Function \A0 MNP block size is 64 characters \A1 MNP block size is 128 characters \A2 MNP block size is 192 characters \A3 MNP block size is 256 characters MNP - EXTENDED SERVICES Type: Configuration Format: AT [cmds] -Kn [cmds] Description: Selects MNP extended services (MNP10) Command Function -K0 V.42 LAPM to MNP 10 connection disabled -K1 V.42 LAPM to MNP 10 connection enabled MNP - STREAM/BLOCK MODE Type: Configuration Format: AT [cmds] \Ln [cmds] Description: Selects the transfer mode for MNP link Command Function \L0 Stream mode for MNP enabled \L1 Block mode for MNP enabled MNP10 - FALLBACK Type: Configuration Format: AT [cmds] -Qn [cmds] Description: Allows MNP10 to fall back to speeds slower than 4800bps MNP10 - LINK NEGOTIATION Type: Configuration Format: AT [cmds] *Hn [cmds] Description: Sets the speed at which MNP10 link negotiation will occur Command Function *H0 Link will be negotiated at highest possible speed *H1 Link will be negotiated at 1200bps *H2 Link will be negotiated at 4800bps MNP10 - POWER LEVEL ADJUST Type: Configuration Format: AT [cmds] )Mn [cmds] Description: Controls automatic transmit power level adjustment during MNP 10 link negotiation Command Function )M0 Power level adjustment disabled )M1 Power level adjustment enabled REPORT INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Description: Displays requested information Command Function I0 SupraFAXModem product ID code I1 ROM checksum I2 Test Checksum (OK if correct, ERROR if not) I3 ROM revision code I4 Encrypted report of supported protocols I5 Supra Copyright information I10 Supported Features I99 Electronic Serial Number RESULT CODES Type: Configuration Format: AT [cmds] Qn [cmds] Description: Enables modem to send result codes to the DTE Command Function Q0 Result code sending enabled Q1 Result code sending disabled Q2 Enable result code sending when Originating, disable when answering RTS TO CTS DELAY Type: Register Format AT [cmds] S26=n [cmds] Default: 1 Range: 0-255 Unit: .01 second Description: Sets the duration of delay for CTS to respond to RTS status change (sync mode only) SELECT CALL PROGRESS RESULT CODES Type: Configuration Format: AT [cmds] Xn [cmds] Description: Enables selection of tone detection and associated result code format options Command Function X0 Basic result codes only enabled X1 Basic and connection speed result codes enabled X2 Basic and connection speed result codes and dialtone detection enabled X3 All result codes except dialtone detection enabled X4 All result codes enabled SLEEP TIMER Type: Register Format AT [cmds] S24=n [cmds] Default: 0 Range: 0-255 Unit: 1 second Description: Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode. STATUS-REGISTER Type: Configuration Format: AT [cmds] (see below) [cmds] Description: Gives options to read or write to a specified register Command Function =n Write value n to the last S register viewed ? Displays current setting for the last S register accessed Sr? Reports value in S register r SCr? Reports value is SC register r Sr=n Write value n into S register r SCr=n Write value n into SC register r SWITCH TO NORMAL MODE Type: Immediate Format: AT [cmds] \Z [cmds] Description: Switches to normal mode from MNP mode TEST MODES Type: Register Format: AT [cmds] S16=n [cmds] Default: 0 Range: 0-125 Unit: Bit-mapped Description: Controls loopback tests, analog, digital, remote digital, and self tests. Bit Value Function 0 0 Local analog loopback not in progress 1 Local analog loopback in progress 1 0 Not used 2 0 Local digital loopback not in progress 1 Local digital loopback in progress 3 0 Modem not in remote digital loopback 1 Remote digital loopback in progress 4 0 Remote digital loopback not requested 1 Remote digital loopback requested 5 0 Remote digital loopback w/ self-test not in progress 1 Remote digital loopback w/ self-test in progress 6 0 Local analog loopback w/ self-test not in progress 1 Local analog loopback w/ self-test in progress TRANSMISSION LEVEL - CELLULAR Type: Configuration Format: AT [cmds] @Mn [cmds] Default: Unidentified Range: 0-1 Unit: Unidentified Description: Sets the signal level for transmission while in cellular mode (MNP10) V.23 MODE Type: Configuration Format: AT [cmds] %Fn [cmds] Description: Selects V.23 split-speed and half-duplex Command Function %F1 75bps transmit, 1200bps receive (split-speed) %F2 1200bps transmit, 75bps receive (split-speed) %F3 1200bps transmit, 1200bps receive (half-duplex) V.23 - SPLIT-SPEED Type: Configuration Format: AT [cmds] \Wn [cmds] Description: Controls V.23 split-speed mode Command Function \W0 V.23 split-speed mode disabled \W1 V.23 split-speed mode enabled V.42bis - CLEAR DICTIONARY Type: Immediate Format: AT [cmds] %P [cmds] Description: Clears both modems' V.42bis dictionaries V.42bis - COMPRESSION CONTROL Type: Configuration Format: AT [cmds] %Mn [cmds] Description: Controls V.42bis data compression Note: Function varies by model Command Function %M0 V.42bis disabled %M1 V.42bis when transmitting enabled %M2 V.42bis when receiving enabled %M3 V.42bis when transmitting/receiving enabled V.42bis - DICTIONARY SIZE Type: Configuration Format: AT [cmds] %Dn [cmds] Description: Select V.42 dictionary size Command Function %D0 Select 512 bytes %D1 Select 1024 bytes %D2 Select 2048 bytes %D3 Select 4096 bytes on one-way compression; 2048 bytes on two-way compression V.42bis - MAXIMUM STRING LENGTH Type: Immediate Format: AT [cmds] %Sn [cmds] Default: 32 Range: 6-250 Unit: Characters Description: Selects string size for V.42bis compression