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 Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis AT&T V.32terbo Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP2-5, V.42, V.42bis 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.