MULTI-TECH SYSTEMS, INC. MT2834ECT4/MT2834ECT4I Modem Type Data (synchronous/asynchronous)/Fax/Voice NIC Type Ethernet Processor 80486SLC Maximum Modem Transfer Rate 28.8Kbps Maximum Fax Transfer Rate 14.4Kbps Maximum NIC Transfer Rate 10Mbps Processor Speed 25MHz Data Bus N/A (see technical note) Topology Linear Bus/Star Fax Class Class I & II Wiring Type Unshielded twisted pair RG-58A/U 50ohm coaxial Data Modulation Protocol Bell 103A/212A ITU-T V.22, V.22bis, V.32, V.32bis, V.34 Fax Modulation Protocol ITU-T V.17, V.27ter, V.29 Error MNP5, V.42, V.42bis Correction/Compression Boot ROM Available Max. Onboard DRAM 16MB [Image] [Image] CONNECTIONS Purpose Location Purpose Location Daughterboard connectors CN1 & CN1A Keyboard CN6 Line out CN2 VGA video out CN7 RG-58A/U 50ohm coaxial CN3 Power CN8 Unshielded twisted pair CN4 Flash BIOS for FLASH modem Serial port CN5 Power switch SW1 CABLE TYPE SELECTION » Cable Type JP2 » RG-58A/U 50ohm coaxial Pins 1 & 2 closed » Unshielded twisted pair Pins 2 & 3 closed LOSS OF CARRIER REBOOT CONFIGURATION » Setting JP1 » Modem will not reboot on loss of Open carrier » Modem will reboot on loss of Closed carrier DRAM CONFIGURATION Size Bank 0 Bank 1 2MB (2) 1M x 9 NONE 4MB (2) 1M x 9 (2) 1M x 9 8MB (2) 4M x 9 NONE 16MB (2) 4M x 9 (2) 4M x 9 DIAGNOSTIC LED(S) LED Color Status Condition SD Red On Modem is transmitting on phone line SD Red Off Modem is not transmitting on phone line RD Red On Modem is receiving on phone line RD Red Off Modem is not receiving on phone line CD Red On Carrier signal detected CD Red Off Carrier signal not detected 28 Red On Modem connected at 28.8Kbps 28 Red Off Modem not connected at 28.8Kbps 14 Red On Modem connected at 14.4Kbps 14 Red Off Modem not connected at 14.4Kbps 96 Red On Modem connected at 9600bps 96 Red Off Modem not connected at 9600bps OH Red On Modem is off-hook OH Red Off Modem is on-hook TR Red On DTR signal is high TR Red Off DTR signal is low DIAGNOSTIC LED(S) (CON’T) EC Red On Modem connected with error correction EC Red Off Modem not connected with error correction EC Red Blinking Modem connected with error correction/compression FX Red On Modem is connected in FAX mode FX Red Off Modem is not connected in FAX mode PWR Red On Power is on PWR Red Off Power is not on TP Red On RG-58A/U port active TP Red Off UTP port active LNK Yellow On RG-58A/U link is good LNK Yellow Off RG-58A/U link is not good RX Red On Modem is receiving on network RX Red Off Modem is not receiving on network TX Red On Modem is transmitting on network TX Red Off Modem is not transmitting on network MISCELLANEOUS TECHNICAL NOTE This is a standalone network modem, designed to let other workstations share this modem and an additional one connected to the serial port. Proprietary AT Command Set AUTO-RELIABLE TIME BUFFER CONFIGURATION Type: Configuration Format: AT [cmds] $A n [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] $EB n [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 PARITY Type: Configuration Format: AT [cmds] #P n [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] #CBN nnxxxx 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] #DB n [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. CALLER ID INFORMATION TRANSMISSION Type: Configuration Format: AT [cmds] &A n [cmds] Example: AT &A1 Description: Controls the transmission of Caller ID information stored in the EPROM. The ID must be inserted into the Flash BIOS image before burning. » Command Function » &A0 Caller ID information transmission disabled. » &A1 Caller ID information transmission enabled. CALLING TONE Type: Configuration Format: AT [cmds] $T n [cmds] Example: AT $T1 DT555-1212 Description: Controls the transmission of the calling tone while dialing. » Command Function » $T0 Calling tone enabled. » $T1 Calling tone disabled. COMMAND SET Type: Configuration Format: AT &Q n 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 &E n Example: AT &E15 #L0 Description: Selects data compression. » Command Function » &E14 Data compression disabled. » &E15 Data compression enabled. COMPRESSION MODE Type: Configuration Format: AT #L n 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] &RF n [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] N n1 [N n2 , N n3 ...] 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] &SF n [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] $D n [cmds] Example: AT $D1 DT555-1212 Description: Turns DTR dialing on and off. » Command Function » $D0 DTR dialing disabled. » $D1 DTR dialing enabled. ERASE CALLBACK NUMBER Type: Immediate Format: AT [cmds] #RDN n [cmds] Example: AT #RCBN05 #RDN05 Description: Erases the callback phone number at the memory location specified. ERASE CALLBACK PASSWORD Type: Immediate Format: AT [cmds] #RCBN n [cmds] Example: AT #RCBN05 #RDN05 Description: Erases the callback password at the memory location specified. 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. FALLBACK MODE Type: Configuration Format: AT [cmds] #F n [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 Type: Configuration Format: AT [cmds] &E n [cmds] Example: AT &E13 Description: Selects flow control. » Command Function » &E12 Flow control disabled. » &E13 Flow control enabled. FLOW CONTROL - ENQ/ACK Type: Configuration Format: AT [cmds] &E n [cmds] Example: AT &E9 Description: Selects ENQ/ACK pacing. » Command Function » &E8 Enables ENQ/ACK pacing. » &E9 Disables ENQ/ACK pacing. FLOW CONTROL IN NORMAL MODE Type: Configuration Format: AT [cmds] &E n [cmds] Example: AT &E11 O Description: Selects XON/XOFF flow control for non-error-correcting connections. » Command Function » &E10 XON/XOFF disabled for non-error-correcting connections. » &E11 XON/XOFF enabled for non-error-correcting connections. FLOW CONTROL TYPE Type: Configuration Format: AT [cmds] &E n [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] #A n [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 $H n 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 L n Example: AT L5 Description: Lists modem configuration. Command Function L Lists all stored phone numbers. 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] $SB nnn [cmds] Example: AT $MB9600 $SB19200 Description: Sets serial port speed. » Command Function $SB300 Sets 300bps speed. $SB1200 Sets 1200bps speed. $SB2400 Sets 2400bps speed. $SB4800 Sets 4800bps speed. $SB9600 Sets 9600bps speed. $SB19200 Sets 19.2Kbps speed. $SB38400 Sets 38.4Kbps speed. $SB57600 Sets 57.6Kbps speed. $SB115200 Sets 115.2Kbps speed. LOCK SERIAL PORT Type: Configuration Format: AT [cmds] $BA n [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] #I xxxx 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] &BS n [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. REDIAL Type: Immediate Format: ATA: Example: AT A: Description: Redials the last number dialed until it is no longer busy. REMOTE CONNECT SPEED Type: Configuration Format: AT $MB nnn 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] $R n [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 PASSWORD Type: Configuration Format: AT [cmds] #S xxxx Example: AT #SsNaFu Description: Sets the setup password to xxxx . The password must be between 6 and 10 characters, case sensitive. It defaults to MODEMSETUP. STORE PHONE NUMBER IN NVRAM Type: Configuration Format: AT [cmds] D <#> N n [dialstring] Example: AT D555-1212N1 Description: Stores a phone number in the modem’s memory. TRELLIS MODULATION Type: Configuration Format: AT [cmds] #T n [cmds] Example: AT #T1 Description: Controls Trellis Coded Modulation. » Command Function » #T0 Disables TCM. » #T1 Enables TCM. UUCP SPOOFING Type: Configuration Format: AT [cmds] $SP n [cmds] Example: AT $SP1 O Description: Controls the UUCP spoofing function. » Command Function » $SP0 Spoofing disabled. » $SP1 Spoofing enabled. XON/XOFF PASS-THROUGH Type: Configuration Format: AT [cmds] &E n [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. XOFF SEND Type: Configuration Format: AT [cmds] #X n [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.