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# MULTI-TECH SYSTEMS, INC.
MT2834ECT4/MT2834ECT4I
Modem Type Data
(synchronous/asynchronous)/Fax/Voice
NIC Type Ethernet
Processor 80486SLC
Maximum Modem Transfer 28.8Kbps
Rate
Maximum Fax Transfer 14.4Kbps
Rate
Maximum NIC Transfer 10Mbps
Rate
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 Bell 103A/212A
Protocol
ITU-T V.22, V.22bis, V.32, V.32bis,
V.34
Fax Modulation ITU-T V.17, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
Boot ROM Available
Max. Onboard DRAM 16MB
(IMG) IMG 1
(IMG) IMG 2
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Daughterboard | CN1 & | Keyboard | CN6 |
| connectors | CN1A | | |
|---------------------+----------+----------------+----------|
| Line out | CN2 | VGA video out | CN7 |
|---------------------+----------+----------------+----------|
| RG-58A/U 50ohm | CN3 | Power | CN8 |
| coaxial | | | |
|---------------------+----------+----------------+----------|
| Unshielded twisted | CN4 | Flash BIOS for | FLASH |
| pair | | 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 carrier | Open |
|---+------------------------------------------+-------------|
| » | Modem will reboot on loss of carrier | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|--------------+---------------------------------------------|
| Description: | Erases the callback password at the memory |
| | location specified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ESCAPE SEQUENCE - OUT OF BAND |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | <BREAK> AT [cmds] <CR> |
|--------------+---------------------------------------------|
| Example: | <BREAK> AT #F1 <CR> |
|--------------+---------------------------------------------|
| Description: | Puts the modem in Command Mode. |
|--------------+---------------------------------------------|
| Notes: | Do not precede this command with AT. |
| | |
| | <BREAK> refers to the hardware modem break |
| | signal. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FALLBACK MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|------------------+-----------------------------------------|
| | Format: | AT [cmds] #F n [cmds] |
|---+--------------+-----------------------------------------|
| | Example: | AT #F1 O <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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: <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|--------------+---------------------------------------------|
| 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 <CR> |
|--------------+---------------------------------------------|
| Description: | Stores a phone number in the modem’s |
| | memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRELLIS MODULATION |
|------------------------------------------------------------|
| Type: | Configuration |
|------------------+-----------------------------------------|
| | Format: | AT [cmds] #T n [cmds] |
|---+--------------+-----------------------------------------|
| | Example: | AT #T1 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | 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 <CR> |
|---+--------------+-----------------------------------------|
| | Description: | Selects how XOFF signal is sent. |
|---+--------------+-----------------------------------------|
| » | Command | Function |
|---+--------------+-----------------------------------------|
| » | #X0 | Single XOFF character sent until ready. |
|---+--------------+-----------------------------------------|
| » | #X1 | Multiple XOFF characters sent until |
| | | ready. |
+------------------------------------------------------------+