MULTITECH SYSTEMS, INC. ======================= MT1932ZDX/MT1932ZDXI/MT1932ZDXK Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 19.2Kbps Maximum Fax Rate 14.4Kbps Data Bus External Fax Class Class I & II Data Modulation Bell 103A/212A Protocol ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis AT&T V.32terbo Fax Modulation ITU-T V.17, V.21CH2, V.27ter, V.29 Protocol Error MNP2-5, V.42, V.42bis Correction/Compression Proprietary Command Set +------------------------------------------------------------+ | ANSWER-BACK | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &An [cmds] | |--------------+---------------------------------------------| | Example: | AT &A1 | |--------------+---------------------------------------------| | Description: | Controls the modem's ability to respond | | | with its identification. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &A0 | Disables answer-back. | |--------------+---------------------------------------------| | &A1 | Enables answer-back. | +------------------------------------------------------------+ +------------------------------------------------------------+ | AUTO-RELIABLE TIME BUFFER CONFIGURATION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $An [cmds] | |--------------+---------------------------------------------| | Example: | AT $A1 &W | |--------------+---------------------------------------------| | Description: | Controls the handling of incoming data | | | during auto-reliable time period. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> $A0 | Data is discarded.x | |--------------+---------------------------------------------| | $A1 | Data is buffered. | +------------------------------------------------------------+ +------------------------------------------------------------+ | BIT MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $EBn [cmds] | |--------------+---------------------------------------------| | Example: | AT $EB1 E1 | |--------------+---------------------------------------------| | Description: | Selects 10- or 11-bit mode. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> $EB0 | Sets 10-bit mode. | |--------------+---------------------------------------------| | $EB1 | Sets 11-bit mode. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CARRIER MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Cn [cmds] | |--------------+---------------------------------------------| | Example: | AT &C0 A | |--------------+---------------------------------------------| | Description: | Sets the function of the Carrier Detect | | | (CD) signal. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &C0 | Forces CD high. | |--------------+---------------------------------------------| |>> &C1 | CD signal follows carrier. | |--------------+---------------------------------------------| | &C2 | Forces CD low for time in S24 when the | | | modem disconnects. | |--------------+---------------------------------------------| | &C4 | Resets modem when CD goes low. | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMAND ESCAPE TYPE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] %En [cmds] | |--------------+---------------------------------------------| | Example: | AT %E3 &W | |--------------+---------------------------------------------| | Description: | Sets type and response of command escape | | | sequence. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | %E0 | Command escape disabled. | |--------------+---------------------------------------------| |>> %E1 | TIES escape (+++AT...) | |--------------+---------------------------------------------| | %E2 | AT method. | |--------------+---------------------------------------------| | %E3 | Both TIES and BREAK methods. | |--------------+---------------------------------------------| | %E4 | OK response to command escape disabled. | |--------------+---------------------------------------------| | %E5 | OK response to command escape enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMMAND SET | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT &Qn | |--------------+---------------------------------------------| | Example: | AT &Q1 | |--------------+---------------------------------------------| | Description: | Selects standard Hayes or custom command | | | sets. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &Q0 | Multi-Tech custom command set enabled. | |--------------+---------------------------------------------| | &Q1 | Standard Hayes command set enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMPRESSION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT &En | |--------------+---------------------------------------------| | Example: | AT &E15 #L0 | |--------------+---------------------------------------------| | Description: | Selects data compression. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &E14 | Data compression disabled. | |--------------+---------------------------------------------| |>> &E15 | Data compression enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | COMPRESSION MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT #Ln | |--------------+---------------------------------------------| | Example: | AT #L2 DT555-1212 | |--------------+---------------------------------------------| | Description: | Selects active compression protocols. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> #L0 | V.42 negotiation enabled. | |--------------+---------------------------------------------| | #L1 | MNP negotiation enabled. | |--------------+---------------------------------------------| | #L2 | LAP-M negotiation enabled. | |--------------+---------------------------------------------| | #L3 | LAP-M enabled, no negotiation. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CTS SIGNAL | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &RFn [cmds] | |--------------+---------------------------------------------| | Example: | AT &RF0 | |--------------+---------------------------------------------| | Description: | Selects the function of the CTS signal. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &RF0 | CTS is set to RTS. | |--------------+---------------------------------------------| |>> &RF1 | CTS is independent of RTS. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAL STORED PHONE NUMBER | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] Nn1 [Nn2, Nn3...] | |--------------+---------------------------------------------| | Example: | ATM0 N1N3N5 | |--------------+---------------------------------------------| | Description: | Dials stored phone number(s). If the first | | | number is busy, the modem will proceed to | | | the next number in the list. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DSR SIGNAL | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &SFn [cmds] | |--------------+---------------------------------------------| | Example: | AT &SF0 | |--------------+---------------------------------------------| | Description: | Selects the function of the DSR signal. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &SF0 | DSR is set to CD. | |--------------+---------------------------------------------| | &SF1 | DSR is independent of CD. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DTR DIALING | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $Dn [cmds] | |--------------+---------------------------------------------| | Example: | AT $D1 DT555-1212 | |--------------+---------------------------------------------| | Description: | Turns DTR dialing on and off. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> $D0 | DTR dialing disabled. | |--------------+---------------------------------------------| | $D1 | DTR dialing enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DTR MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Dn [cmds] | |--------------+---------------------------------------------| | Example: | AT &D1 | |--------------+---------------------------------------------| | Description: | Sets the function of the DTR signal. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &D0 | DTR is ignored. | |--------------+---------------------------------------------| | &D1 | Modem returns to command mode on high DTR. | |--------------+---------------------------------------------| |>> &D2 | DTR normal operation. | |--------------+---------------------------------------------| | &D3 | Modem resets on high DTR. | +------------------------------------------------------------+ +------------------------------------------------------------+ | DTR TIMEOUT | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S24=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS24=40 | |--------------+---------------------------------------------| | Default: | 20 | |--------------+---------------------------------------------| | Range: | 0-255 | |--------------+---------------------------------------------| | Unit: | 50 ms | |--------------+---------------------------------------------| | Description: | Sets the time to drop the DTR signal to | | | hangup. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ERASE CALLBACK NUMBER | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] #RDNn [cmds] | |--------------+---------------------------------------------| | Example: | AT #RCBN05 #RDN05 | |--------------+---------------------------------------------| | Description: | Erases the callback phone number at the | | | memory location specified. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ERROR CORRECTION DISABLE ON CONNECT | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $Fn [cmds] | |--------------+---------------------------------------------| | Example: | AT $F1 DT555-1212 | |--------------+---------------------------------------------| | Description: | Selects whether error correction can be | | | disabled by a while handshaking. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $F0 | Error correction handshake interrupt | | | disabled. | |--------------+---------------------------------------------| |>> $F1 | Error correction handshake interrupt | | | enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ESCAPE SEQUENCE BUFFER SIZE | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S34=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS34=30 | |--------------+---------------------------------------------| | Default: | 10 | |--------------+---------------------------------------------| | Range: | 0-60 | |--------------+---------------------------------------------| | Unit: | 1 byte | |--------------+---------------------------------------------| | Description: | Sets the size of the buffer used to store | | | commands during an escape sequence. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ESCAPE SEQUENCE - OUT OF BAND | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] | |--------------+---------------------------------------------| | Example: | AT #F1 | |--------------+---------------------------------------------| | Description: | Puts the modem in Command Mode. | |--------------+---------------------------------------------| | Notes: | Do not precede this command with AT. | | | | | | refers to the hardware modem break | | | signal. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ESCAPE SEQUENCE TIMEOUT | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S32=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS32=30 | |--------------+---------------------------------------------| | Default: | 20 | |--------------+---------------------------------------------| | Range: | 0-255 | |--------------+---------------------------------------------| | Unit: | 1 second | |--------------+---------------------------------------------| | Description: | Sets the maximum amount of time the modem | | | will wait for a while executing an | | | escape sequence. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FALLBACK MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] #Fn [cmds] | |--------------+---------------------------------------------| | Example: | AT #F1 O | |--------------+---------------------------------------------| | Description: | Sets direction of fallback. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | #F0 | Fallback disabled. | |--------------+---------------------------------------------| | #F1 | Fallback from 19.2Kbps to 4800bps as line | | | quality degrades. | |--------------+---------------------------------------------| |>> #F2 | Fallback from 4800bps to 19.2Kbps as line | | | quality improves. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL NORMAL MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &En [cmds] | |--------------+---------------------------------------------| | Example: | AT &E11 O | |--------------+---------------------------------------------| | Description: | Selects normal flow control. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &E10 | Normal mode disabled. | |--------------+---------------------------------------------| | &E11 | Normal mode enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL TYPE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &En [cmds] | |--------------+---------------------------------------------| | Example: | AT &E4 &W | |--------------+---------------------------------------------| | Description: | Sets type of flow control used by modem. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &E3 | Flow control disabled. | |--------------+---------------------------------------------| |>> &E4 | CTS/RTS flow control enabled. | |--------------+---------------------------------------------| | &E5 | XON/XOFF flow control enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | HANDSHAKE ATTEMPTS | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] #An [cmds] | |--------------+---------------------------------------------| | Example: | AT #A1 #L3 | |--------------+---------------------------------------------| | Description: | Configures the initial handshake phase. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | #A0 | Attempts in order: 19.2Kbps, 16.8Kbps, | | | 14.4Kbps, 12Kbps, 9600bps, 4800bps, | | | 2400bps, 1200bps, 300bps. | |--------------+---------------------------------------------| | #A1 | Attempts only 14.4Kbps. | |--------------+---------------------------------------------| | #A2 | Attempts in order: 19.2Kbps, 16.8Kbps, | | | 14.4Kbps, 12Kbps, 9600bps, 4800bps. | |--------------+---------------------------------------------| | #A3 | Attempts in order: 2400bps, 1200bps, | | | 300bps. | +------------------------------------------------------------+ +------------------------------------------------------------+ | HELP SCREENS | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT $Hn | |--------------+---------------------------------------------| | Example: | AT $H1 | |--------------+---------------------------------------------| | Description: | Shows modem help screens. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $H1 | Shows help screen 1. | |--------------+---------------------------------------------| | $H2 | Shows help screen 2. | |--------------+---------------------------------------------| | $H3 | Shows help screen 3. | +------------------------------------------------------------+ +------------------------------------------------------------+ | LIST CONFIGURATION | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT Ln | |--------------+---------------------------------------------| | Example: | AT L5 | |--------------+---------------------------------------------| | Description: | Lists modem configuration. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | L5 | Lists all settings. | |--------------+---------------------------------------------| | L6 | Lists the values of all S-registers. | |--------------+---------------------------------------------| | L7 | Lists extended parameters. | |--------------+---------------------------------------------| | L8 | Lists current diagnostics. | +------------------------------------------------------------+ +------------------------------------------------------------+ | LOCAL SERIAL PORT SPEED | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $SBnnn [cmds] | |--------------+---------------------------------------------| | Example: | AT $MB9600 $SB19200 | |--------------+---------------------------------------------| | Description: | Sets serial port speed. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $SB300 | Sets 300baud speed. | |--------------+---------------------------------------------| | $SB1200 | Sets 1200baud speed. | |--------------+---------------------------------------------| | $SB2400 | Sets 2400baud speed. | |--------------+---------------------------------------------| | $SB4800 | Sets 4800baud speed. | |--------------+---------------------------------------------| | $SB9600 | Sets 9600baud speed. | |--------------+---------------------------------------------| | $SB19200 | Sets 19.2Kbaud speed. | |--------------+---------------------------------------------| | $SB38400 | Sets 38.4Kbaud speed. | |--------------+---------------------------------------------| | $SB57600 | Sets 57.6Kbaud speed. | |--------------+---------------------------------------------| | $SB115200 | Sets 115.2Kbaud speed. | +------------------------------------------------------------+ +------------------------------------------------------------+ | LOCK SERIAL PORT | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $BAn [cmds] | |--------------+---------------------------------------------| | Example: | AT $SB57600 $BA0 | |--------------+---------------------------------------------| | Description: | Sets operation of serial port speed. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> $BA0 | Serial speed locked at rate set by $SB. | |--------------+---------------------------------------------| | $BA1 | Serial speed follows connect speed, | | | ignoring $SB. | +------------------------------------------------------------+ +------------------------------------------------------------+ | LOOPBACK | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Tn [cmds] | |--------------+---------------------------------------------| | Example: | AT &T5 | |--------------+---------------------------------------------| | Description: | Enables or disables remote digital loopback | | | response. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &T4 | Loopback response enabled. | |--------------+---------------------------------------------| | &T5 | Loopback response disabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | MAXIMUM BLOCK SIZE FOR TRANSMISSION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &BSn [cmds] | |--------------+---------------------------------------------| | Example: | AT &BS1 &MB28800 | |--------------+---------------------------------------------| | Description: | Sets the maximum transmittable block size. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &BS0 | Maximum block size is 64 characters. | |--------------+---------------------------------------------| |>> &BS1 | Maximum block size is 128 characters for | | | LAP-M, and 256 characters for MNP. | +------------------------------------------------------------+ +------------------------------------------------------------+ | PACING | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &En [cmds] | |--------------+---------------------------------------------| | Example: | AT &E13 | |--------------+---------------------------------------------| | Description: | Selects ENQ/ACK pacing. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &E12 | Disables ENQ/ACK pacing. | |--------------+---------------------------------------------| |>> &E13 | Enables ENQ/ACK pacing. | +------------------------------------------------------------+ +------------------------------------------------------------+ | PACING - ENQ/ACK | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &En [cmds] | |--------------+---------------------------------------------| | Example: | AT &E9 | |--------------+---------------------------------------------| | Description: | Selects ENQ/ACK pacing. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &E8 | Enables ENQ/ACK pacing. | |--------------+---------------------------------------------| | &E9 | Disables ENQ/ACK pacing. | +------------------------------------------------------------+ +------------------------------------------------------------+ | REDIAL | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | ATA: | |--------------+---------------------------------------------| | Example: | ATA: | |--------------+---------------------------------------------| | Description: | Redials the last number dialed until it is | | | no longer busy. | +------------------------------------------------------------+ +------------------------------------------------------------+ | REMOTE CONNECT SPEED | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT $MBnnn | |--------------+---------------------------------------------| | Example: | AT $MB9600 $SB19200 | |--------------+---------------------------------------------| | Description: | Sets maximum remote connect speed. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $MB300 | Sets 300bps connect. | |--------------+---------------------------------------------| | $MB1200 | Sets 1200bps connect. | |--------------+---------------------------------------------| | $MB2400 | Sets 2400bps connect. | |--------------+---------------------------------------------| | $MB4800 | Sets 4800bps connect. | |--------------+---------------------------------------------| | $MB9600 | Sets 9600bps connect. | |--------------+---------------------------------------------| | $MB14400 | Sets 14.4Kbps connect. | |--------------+---------------------------------------------| | $MB19200 | Sets 19.2Kbps connect. | +------------------------------------------------------------+ +------------------------------------------------------------+ | RETRANSMIT FAIL ACTION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $Rn [cmds] | |--------------+---------------------------------------------| | Example: | AT $R1 | |--------------+---------------------------------------------| | Description: | Sets whether the modem gives up on a bad | | | connection. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> $R0 | Hang up after 12 failed retransmissions. | |--------------+---------------------------------------------| | $R1 | Do not hang up after 12 failed | | | retransmissions. | +------------------------------------------------------------+ +------------------------------------------------------------+ | STORE PHONE NUMBER IN NVRAM | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] D<#>Nn [dialstring] | |--------------+---------------------------------------------| | Example: | ATD555-1212N1 | |--------------+---------------------------------------------| | Description: | Stores a phone number in the modem's | | | memory. | +------------------------------------------------------------+ +------------------------------------------------------------+ | TIME UNTIL HANG UP ON LOW DTR | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S36=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS36=5 | |--------------+---------------------------------------------| | Default: | 0 | |--------------+---------------------------------------------| | Range: | 0-255 | |--------------+---------------------------------------------| | Unit: | 1 second | |--------------+---------------------------------------------| | Description: | Sets the maximum amount of time the modem | | | will wait to hang up after the DTR signal | | | goes low. | +------------------------------------------------------------+ +------------------------------------------------------------+ | TIME UNTIL PICK UP ON HIGH DTR | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S37=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS37=5 | |--------------+---------------------------------------------| | Default: | 0 | |--------------+---------------------------------------------| | Range: | 0-255 | |--------------+---------------------------------------------| | Unit: | 1 second | |--------------+---------------------------------------------| | Description: | Sets the maximum amount of time the modem | | | will wait to pick up after the DTR signal | | | goes high. | +------------------------------------------------------------+ +------------------------------------------------------------+ | TRELLIS MODULATION | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] #Tn [cmds] | |--------------+---------------------------------------------| | Example: | AT #T1 | |--------------+---------------------------------------------| | Description: | Controls Trellis Coded Modulation. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | #T0 | Disables TCM. | |--------------+---------------------------------------------| |>> #T1 | Enables TCM. | +------------------------------------------------------------+ +------------------------------------------------------------+ | V.42 MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &En [cmds] | |--------------+---------------------------------------------| | Example: | AT &E0 | |--------------+---------------------------------------------| | Description: | Configures the operation of V.42 mode. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &E0 | Error correction disabled. | |--------------+---------------------------------------------| |>> &E1 | V.42 set to auto-reliable. | |--------------+---------------------------------------------| | &E2 | V.42 set to reliable. | +------------------------------------------------------------+ +------------------------------------------------------------+ | V.42 LOW SPEED | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] $En [cmds] | |--------------+---------------------------------------------| | Example: | AT $E1 | |--------------+---------------------------------------------| | Description: | Selects whether a V.42 connection will be | | | attempted at 300bps. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> $E0 | V.42 disabled at 300bps. | |--------------+---------------------------------------------| | $E1 | V.42 enabled at 300bps. | +------------------------------------------------------------+ +------------------------------------------------------------+ | XOFF SEND | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] #Xn [cmds] | |--------------+---------------------------------------------| | Example: | AT #X1 | |--------------+---------------------------------------------| | Description: | Selects how XOFF signal is sent. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> #X0 | Single XOFF character sent until ready. | |--------------+---------------------------------------------| | #X1 | Multiple XOFF characters sent until ready. | +------------------------------------------------------------+ +------------------------------------------------------------+ | XON/XOFF PASS-THROUGH | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &En [cmds] | |--------------+---------------------------------------------| | Example: | AT &E7 O | |--------------+---------------------------------------------| | Description: | Selects whether XON/XOFF signals are sent | | | to remote modem. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &E6 | XON/XOFF signals trapped by local modem. | |--------------+---------------------------------------------| | &E7 | XON/XOFF passed through local modem. |