MULTITECH SYSTEMS, INC. MT2834BC/MT2834BCI Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus 16-bit ISA 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, V.34 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 [Image] CONNECTIONS Purpose Location Purpose Location Line-in CN1 Line-out CN2 INTERRUPT SELECTION IRQ JP1/A JP1/B JP1/C JP1/D JP1/E JP1/F JP1/G JP1/H JP1/I JP1/J » 3 Open Closed Open Open Open Open Open Open Open Open 2 Closed Open Open Open Open Open Open Open Open Open 4 Open Open Closed Open Open Open Open Open Open Open 5 Open Open Open Closed Open Open Open Open Open Open 7 Open Open Open Open Closed Open Open Open Open Open 10 Open Open Open Open Open Closed Open Open Open Open 11 Open Open Open Open Open Open Closed Open Open Open 12 Open Open Open Open Open Open Open Closed Open Open 14 Open Open Open Open Open Open Open Open Closed Open 16 Open Open Open Open Open Open Open Open Open Closed BASE I/O ADDRESS SELECTION Address SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 SW1/7 100h Off On On On On On On 200h On Off On On On On On 300h Off Off On On On On On 400h On On Off On On On On 500h Off On Off On On On On 2E8h Off On Off Off Off On Off (COM4:) » 2F8h Off Off Off Off Off On Off (COM2:) 3D8h Off Off On Off Off Off Off 3E0h On On Off Off Off Off Off 3E8h Off On Off Off Off Off Off (COM3:) 3F0h On Off Off Off Off Off Off 3F8h Off Off Off Off Off Off Off (COM1:) Note: A total of 127 memory base I/O address settings are available. The switches are a binary representation of the hexadecimal addresses. Switch SW1/1 is the Least Significant Bit and switch SW1/7 is the Most Significant Bit. The switches have the following decimal values: switch SW1/1=8, SW1/2=16, SW1/3=32, SW1/4=64, SW1/5=128, SW1/6=256, SW1/7=512.Turn off the switches and add the values of the off switches to obtain the correct base I/O address. (on=0, off=1) FACTORY CONFIGURED - DO NOT ALTER Switch Position SW1/8 On Proprietary Command Set 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. $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. CALLBACK ATTEMPTS Type: Register Format: AT [cmds] S16=n [cmds] Example: ATS16=6 Default: 4 Range: 1-255 Unit: 1 attempt Description: Sets the maximum number of login attempts after initial callback connection. CALLBACK NUMBER Type: Configuration Format: AT [cmds] [+/-]DT<#>Nnn Examples: AT#DB2 +-DT555-1212N10 Description: Sets the phone number associated with the password at memory location nn. Command Function +DT Modem will initiate callback on successful login. -DT Modem will allow immediate entry on successful login without callback. +-DT If password is followed by a -, modem will allow immediate entry. If password is followed by a + or nothing, modem will initiate callback. CALLBACK PARITY Type: Configuration Format: AT [cmds] #Pn [cmds] Example: AT #P0 #DB1 Description: Sets the parity of the modem when in callback mode. Command Function » #P0 No parity. #P1 Odd parity. #P2 Even parity. CALLBACK PASSWORD Type: Configuration Format: AT [cmds] #CBNnnxxxx Example: AT#DB2 #CBN09snarf Description: Sets the callback password at memory location nn to xxxx. The password must be between 6 and 10 characters, inclusive. CALLBACK SECURITY Type: Configuration Format: AT [cmds] #DBn [cmds] Example: AT #DB1 S0=1 Description: Sets the security level of the callback function. Command Function » #DB0 Disables security and clears callback memory. #DB1 Enables remote security only. #DB2 Enables local and remote security. 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 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 PASSWORD Type: Immediate Format: AT [cmds] #RCBNn [cmds] Example: AT #RCBN05 #RDN05 Description: Erases the callback password at the memory location specified. 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. FACTORY DEFAULTS Type: Immediate/Configuration Format: AT &F[n] Example: AT &F8 Description: Loads factory defaults, or sets write protect on NVRAM. Command Function &F Reloads defaults by setting. (Immediate, see below.) » &F8 Sets &F to read factory defaults from ROM, and disables NVRAM write protect. &F9 Sets &F to read defaults from NVRAM, and enables write-protect. FAILED PASSWORD ATTEMPTS Type: Register Format: AT [cmds] S26? Example: ATS26? Default: Read-only Range: 0-255 Unit: 1 attempt Description: This register stores the number of failed password attempts. 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 28.8Kbps to 2400bps as line quality degrades. » #F2 Fallback from 2400bps to 28.8Kbps 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: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps. #A1 Attempts only 28.8Kbps. #A2 Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 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. LOGIN PASSWORD Type: Configuration Format: AT [cmds] #Ixxxx Example: AT #IMicroHouse Description: Sets the login password to xxxx. The password must be between 6 and 10 characters, case sensitive. It defaults to MULTI-TECH. 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 $MB75 Sets V.23 (1200bps/75bps bi-directional). $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. $MB28800 Sets 28.8Kbps 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. SETUP INACTIVITY TIMER Type: Register Format: AT [cmds] S29=n [cmds] Example: ATS29=5 Default: 20 Range: 1-255 Unit: 1 minute Description: Sets the maximum amount of time between commands until the setup password must be re-entered. 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. UUCP SPOOFING Type: Configuration Format: AT [cmds] $SPn [cmds] Example: AT $SP1 O Description: Controls the UUCP spoofing function. Command Function » $SP0 Spoofing disabled. $SP1 Spoofing enabled. V.32terbo CONTROL Type: Configuration Format: AT [cmds] #Vn [cmds] Example: AT #V1 DT555-1212 Description: Controls the V.32terbo protocol in answer mode. Command Function » #V0 V.32terbo enabled. #V1 V.32terbo disabled. 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. 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.