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# MULTITECH SYSTEMS, INC.
MT932BA/MT932BAI/MT932BA-MAC
Modem Type Data (synchronous/asynchronous)/Fax
Maximum Data Rate 9600bps
Maximum Fax Rate 9600bps
Data Bus External
Fax Class Class I & II
Data Modulation Protocol Bell 103A/212A
ITU-T V.21, V.22, V.22bis, V.23
Fax Modulation Protocol ITU-T V.21CH2, V.27ter, V.29
Error MNP2-5, V.42, V.42bis
Correction/Compression
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Line in | CN1 | DC power | CN4 |
|------------------+----------+-------------------+----------|
| Line out | CN2 | Volume | R1 |
|------------------+----------+-------------------+----------|
| RS-232/422 | CN3 | Power switch | SW4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ORIGINATE MODE |
|------------------------------------------------------------|
| Mode | SW3 |
|-------------------------------+----------------------------|
| Originate | Off |
|-------------------------------+----------------------------|
| Answer | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTR MODE |
|------------------------------------------------------------|
| í Mode | SW1/1 |
|-------------------------------+----------------------------|
| » DTR normal | On |
|-------------------------------+----------------------------|
| í DTR forced high | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| í Mode | Async/Sync | SW1/2 |
|-------------------------+-------------------+--------------|
| » Hardware flow control | Async | On |
|-------------------------+-------------------+--------------|
| í Software flow control | Async | Off |
|-------------------------+-------------------+--------------|
| » SDLC | Sync | On |
|-------------------------+-------------------+--------------|
| í BSC | Sync | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES and LINE ATTENUATION |
|------------------------------------------------------------|
| í Mode | Switched/Leased | SW1/3 |
|-------------------------+--------------------+-------------|
| » Result codes enabled | Switched | Off |
|-------------------------+--------------------+-------------|
| í Result codes disabled | Switched | On |
|-------------------------+--------------------+-------------|
| » Transmit at 0dB | Leased | Off |
|-------------------------+--------------------+-------------|
| í Transmit at -10dB | Leased | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| UUCP SPOOFING and AS/400 MODE |
|------------------------------------------------------------|
| í Mode | Async/Sync | SW1/4 |
|--------------------------+-------------------+-------------|
| » UUCP spoofing disabled | Async | On |
|--------------------------+-------------------+-------------|
| í UUCP spoofing enabled | Async | Off |
|--------------------------+-------------------+-------------|
| AS/400 disabled | Sync | On |
|--------------------------+-------------------+-------------|
| AS/400 enabled | Sync | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-ANSWER and ANSWER/ORIGINATE |
|------------------------------------------------------------|
| í Mode | Switched/Leased | SW1/5 |
|------------------------+--------------------+--------------|
| » Auto-answer enabled | Switched | On |
|------------------------+--------------------+--------------|
| í Auto-answer disabled | Switched | Off |
|------------------------+--------------------+--------------|
| » Answer mode | Leased | On |
|------------------------+--------------------+--------------|
| í Originate mode | Leased | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EFFICIENCY MODE and SLAVE CLOCK |
|------------------------------------------------------------|
| í Mode | Async/Sync | SW1/6 |
|-------------------------------------+-------------+--------|
| » Modem set to maximum effiency | Async | On |
|-------------------------------------+-------------+--------|
| í Modem not set to maximum effiency | Async | Off |
|-------------------------------------+-------------+--------|
| » Clock controlled remotely | Sync | On |
|-------------------------------------+-------------+--------|
| í Clock controlled locally | Sync | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RTS MODE |
|------------------------------------------------------------|
| í Mode | SW1/7 |
|-------------------------------+----------------------------|
| » RTS forced high | Off |
|-------------------------------+----------------------------|
| í RTS normal | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND MODE |
|------------------------------------------------------------|
| í Mode | SW1/8 |
|-------------------------------+----------------------------|
| » Command mode enabled | Off |
|-------------------------------+----------------------------|
| í Command mode disabled | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOOPBACK MODE |
|------------------------------------------------------------|
| í Mode | SW1/9 |
|-------------------------------+----------------------------|
| » Remote loopback | Off |
|-------------------------------+----------------------------|
| í Local loopback | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE TYPE |
|------------------------------------------------------------|
| í Type | SW1/10 | SW5 |
|--------------------+--------------------+------------------|
| » Switched | On | On |
|--------------------+--------------------+------------------|
| í Leased | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODE TYPE and CLOCK SOURCE |
|------------------------------------------------------------|
| í Mode | Async/Sync | SW1/11 |
|--------------------------+------------------+--------------|
| » Multitech result codes | Async | Off |
|--------------------------+------------------+--------------|
| í AT result codes | Async | On |
|--------------------------+------------------+--------------|
| » Internal clock | Sync | Off |
|--------------------------+------------------+--------------|
| í External clock | Sync | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ASYNCHRONOUS/SYNCHRONOUS MODE |
|------------------------------------------------------------|
| í Mode | SW1/12 |
|-------------------------------+----------------------------|
| » Asynchronous | Off |
|-------------------------------+----------------------------|
| í Synchronous | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| OPERATION SPEED |
|------------------------------------------------------------|
| í Speed | SW2/1 | SW2/2 |
|--------------------+-------------------+-------------------|
| » 9600bps | On | On |
|--------------------+-------------------+-------------------|
| í 4800bps | Off | On |
|--------------------+-------------------+-------------------|
| í 2400bps | On | Off |
|--------------------+-------------------+-------------------|
| í 1200bps | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD/DSR MODE |
|------------------------------------------------------------|
| Mode | SW2/3 |
|-------------------------------+----------------------------|
| » CD and DSR normal | On |
|-------------------------------+----------------------------|
| í CD and DSR forced high | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NVRAM WRITE PROTECTION |
|------------------------------------------------------------|
| í Mode | JP1 |
|----------------------------+-------------------------------|
| » Disabled | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| í Enabled | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| OOS SIGNAL |
|------------------------------------------------------------|
| Mode | JP2 |
|----------------------------+-------------------------------|
| OOS | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| Test | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MODE INDICATE/MODE INDICATE COMMON INTERFACE |
|------------------------------------------------------------|
| í Mode | JP3 |
|----------------------------+-------------------------------|
| » Disabled | Pins 2 & 3, 5 & 6 closed |
|----------------------------+-------------------------------|
| í Enabled | Pins 1 & 2, 4 & 5 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY CONFIGURED - DO NOT ALTER |
|------------------------------------------------------------|
| Switch | Position |
|-----------------------------+------------------------------|
| SW2/4 | N/A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+-------+----------+-----------------------------------|
| SD | Red | On | Modem is transmitting data |
|-----+-------+----------+-----------------------------------|
| SD | Red | Off | Modem is not transmitting data |
|-----+-------+----------+-----------------------------------|
| RD | Red | On | Modem is receiving data |
|-----+-------+----------+-----------------------------------|
| RD | Red | Off | Modem is not receiving data |
|-----+-------+----------+-----------------------------------|
| CD | Red | On | Carrier signal detected |
|-----+-------+----------+-----------------------------------|
| CD | Red | Off | Carrier signal not detected |
|-----+-------+----------+-----------------------------------|
| 96 | Red | On | Modem connected at 9600bps |
|-----+-------+----------+-----------------------------------|
| 96 | Red | Off | Modem not connected at 9600bps |
|-----+-------+----------+-----------------------------------|
| 48 | Red | On | Modem connected at 4800bps |
|-----+-------+----------+-----------------------------------|
| 48 | Red | Off | Modem not connected at 4800bps |
|-----+-------+----------+-----------------------------------|
| 24 | Red | On | Modem connected at 2400bps |
|-----+-------+----------+-----------------------------------|
| 24 | Red | Off | Modem not connected at 2400bps |
|-----+-------+----------+-----------------------------------|
| 12 | Red | On | Modem connected at 1200bps |
|-----+-------+----------+-----------------------------------|
| 12 | Red | Off | Modem not connected at 1200bps |
|-----+-------+----------+-----------------------------------|
| 3 | Red | On | Modem connected at 300bps |
|-----+-------+----------+-----------------------------------|
| 3 | Red | Off | Modem not connected at 300bps |
|-----+-------+----------+-----------------------------------|
| 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 |
|-----+-------+----------+-----------------------------------|
| EC | Red | On | Error correction enabled |
|-----+-------+----------+-----------------------------------|
| EC | Red | Off | Error correction disabled |
|-----+-------+----------+-----------------------------------|
| EC | Red | Blinking | Error correction activated |
|-----+-------+----------+-----------------------------------|
| FX | Red | On | Modem is connected in FAX mode |
|-----+-------+----------+-----------------------------------|
| FX | Red | Off | Modem is not connected in FAX |
| | | | mode |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| AUTO-RELIABLE TIME BUFFER CONFIGURATION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $An [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $A1 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Controls the handling of incoming data |
| | during auto-reliable time period. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » $A0 | Data is discarded. |
|--------------+---------------------------------------------|
| í $A1 | Data is buffered. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $EBn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $EB1 E1<CR> |
|--------------+---------------------------------------------|
| Description: | Selects 10- or 11-bit mode. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » $EB0 | Sets 10-bit mode. |
|--------------+---------------------------------------------|
| í $EB1 | Sets 11-bit mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK ATTEMPTS |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S16=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS16=6<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| Description: | Sets the parity of the modem when in |
| | callback mode. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » #P0 | No parity. |
|--------------+---------------------------------------------|
| í #P1 | Odd parity. |
|--------------+---------------------------------------------|
| í #P2 | Even parity. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK PASSWORD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] #CBNnnxxxx |
|--------------+---------------------------------------------|
| 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] #DBn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT #DB1 S0=1<CR> |
|--------------+---------------------------------------------|
| Description: | Sets the security level of the callback |
| | function. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » #DB0 | Disables security and clears callback |
| | memory. |
|--------------+---------------------------------------------|
| í #DB1 | Enables remote security only. |
|--------------+---------------------------------------------|
| í #DB2 | Enables local and remote security. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND ESCAPE TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT %E3 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Sets type and response of command escape |
| | sequence. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í %E0 | Command escape disabled. |
|--------------+---------------------------------------------|
| » %E1 | TIES escape (+++AT...) |
|--------------+---------------------------------------------|
| í %E2 | <BREAK>AT method. |
|--------------+---------------------------------------------|
| í %E3 | Both TIES and BREAK methods. |
|--------------+---------------------------------------------|
| í %E4 | OK response to command escape disabled. |
|--------------+---------------------------------------------|
| í %E5 | OK response to command escape enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND SET |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT &Qn |
|--------------+---------------------------------------------|
| Example: | AT &Q1<CR> |
|--------------+---------------------------------------------|
| Description: | Selects standard Hayes or custom command |
| | sets. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » &Q0 | Multi-Tech custom command set enabled. |
|--------------+---------------------------------------------|
| í &Q1 | Standard Hayes command set enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT &En |
|--------------+---------------------------------------------|
| Example: | AT &E15 #L0<CR> |
|--------------+---------------------------------------------|
| Description: | Selects data compression. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í &E14 | Data compression disabled. |
|--------------+---------------------------------------------|
| » &E15 | Data compression enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT #Ln |
|--------------+---------------------------------------------|
| Example: | AT #L2 DT555-1212<CR> |
|--------------+---------------------------------------------|
| Description: | Selects active compression protocols. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » #L0 | V.42 negotiation enabled. |
|--------------+---------------------------------------------|
| í #L1 | MNP negotiation enabled. |
|--------------+---------------------------------------------|
| í #L2 | LAP-M negotiation enabled. |
|--------------+---------------------------------------------|
| í #L3 | LAP-M enabled, no negotiation. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CTS SIGNAL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &RFn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &RF0<CR> |
|--------------+---------------------------------------------|
| Description: | Selects the function of the CTS signal. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í &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<CR> |
|--------------+---------------------------------------------|
| Description: | Dials stored phone number(s). If the first |
| | number is busy, the modem will proceed to |
| | the next number in the list. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIALING MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $VDn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $VD <CR> |
|--------------+---------------------------------------------|
| Description: | Selects voice/data mode dialing. |
|--------------+---------------------------------------------|
| í í Command | Function |
|--------------+---------------------------------------------|
| » $VD0 | Disables voice/data mode. |
|--------------+---------------------------------------------|
| í $VD1 | Enables voice/data mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DSR SIGNAL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &SFn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &SF0<CR> |
|--------------+---------------------------------------------|
| Description: | Selects the function of the DSR signal. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » &SF0 | DSR is set to CD. |
|--------------+---------------------------------------------|
| í &SF1 | DSR is independent of CD. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTR DIALING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $Dn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $D1 DT555-1212<CR> |
|--------------+---------------------------------------------|
| Description: | Turns DTR dialing on and off. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » $D0 | DTR dialing disabled. |
|--------------+---------------------------------------------|
| í $D1 | DTR dialing enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTR TIMEOUT |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S24=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS24=40<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| Description: | Erases the callback password at the memory |
| | location specified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERASE CALLBACK NUMBER |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] #RDNn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT #RCBN05 #RDN05<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| Description: | Selects whether error correction can be |
| | disabled by a <CR> while handshaking. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í $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<CR> |
|--------------+---------------------------------------------|
| 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: | <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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ESCAPE SEQUENCE TIMEOUT |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S32=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS32=30<CR> |
|--------------+---------------------------------------------|
| Default: | 20 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Sets the maximum amount of time the modem |
| | will wait for a <CR> while executing an |
| | escape sequence. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY DEFAULTS |
|------------------------------------------------------------|
| Type: | Immediate/Configuration |
|--------------+---------------------------------------------|
| Format: | AT &F[n] |
|--------------+---------------------------------------------|
| Example: | AT &F8<CR> |
|--------------+---------------------------------------------|
| Description: | Loads factory defaults, or sets write |
| | protect on NVRAM. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í &F | Reloads defaults by setting. (Immediate, |
| | see below.) |
|--------------+---------------------------------------------|
| » &F8 | Sets &F to read factory defaults from ROM, |
| | and disables NVRAM write protect. |
|--------------+---------------------------------------------|
| í &F9 | Sets &F to read defaults from NVRAM, and |
| | enables write-protect. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FAILED PASSWORD ATTEMPTS |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S26? |
|--------------+---------------------------------------------|
| Example: | ATS26?<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| Description: | Sets direction of fallback. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í #F0 | Fallback disabled. |
|--------------+---------------------------------------------|
| í #F1 | Fallback from 9600bps to 2400bps as line |
| | quality degrades. |
|--------------+---------------------------------------------|
| » #F2 | Fallback from 2400bps to 9600bps as line |
| | quality improves. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL NORMAL MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &E11 O<CR> |
|--------------+---------------------------------------------|
| Description: | Selects normal flow control. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » &E10 | Normal mode disabled. |
|--------------+---------------------------------------------|
| í &E11 | Normal mode enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &E4 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by modem. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í &E3 | Flow control disabled. |
|--------------+---------------------------------------------|
| » &E4 | CTS/RTS flow control enabled. |
|--------------+---------------------------------------------|
| í &E5 | XON/XOFF flow control enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HANDSHAKE ATTEMPTS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] #An [cmds] |
|--------------+---------------------------------------------|
| Example: | AT #A1 #L3<CR> |
|--------------+---------------------------------------------|
| Description: | Configures the initial handshake phase. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| #A0 | Attempts in order: 9600bps, 4800bps, |
| | 2400bps, 1200bps, 300bps. |
|--------------+---------------------------------------------|
| #A1 | Attempts only 9600bps. |
|--------------+---------------------------------------------|
| #A2 | Attempts only 9600bps and 4800bps. |
|--------------+---------------------------------------------|
| #A3 | Attempts in order: 2400bps, 1200bps, |
| | 300bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP SCREENS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT $Hn |
|--------------+---------------------------------------------|
| 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 Ln |
|--------------+---------------------------------------------|
| Example: | AT L5<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| Description: | Sets serial port speed. |
|--------------+---------------------------------------------|
| í 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] $BAn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $SB57600 $BA0<CR> |
|--------------+---------------------------------------------|
| Description: | Sets operation of serial port speed. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » $BA0 | Serial speed locked at rate set by $SB. |
|--------------+---------------------------------------------|
| í $BA1 | Serial speed follows connect speed, |
| | ignoring $SB. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOGIN PASSWORD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] #Ixxxx |
|--------------+---------------------------------------------|
| 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] &BSn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &BS1 &MB28800<CR> |
|--------------+---------------------------------------------|
| Description: | Sets the maximum transmittable block size. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í &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<CR> |
|--------------+---------------------------------------------|
| Description: | Selects ENQ/ACK pacing. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í &E12 | Disables ENQ/ACK pacing. |
|--------------+---------------------------------------------|
| » &E13 | Enables ENQ/ACK pacing. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PACING - ENQ/ACK |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &E9<CR> |
|--------------+---------------------------------------------|
| Description: | Selects ENQ/ACK pacing. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » &E8 | Enables ENQ/ACK pacing. |
|--------------+---------------------------------------------|
| í &E9 | Disables ENQ/ACK pacing. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REDIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | ATA: |
|--------------+---------------------------------------------|
| Example: | ATA:<CR> |
|--------------+---------------------------------------------|
| Description: | Redials the last number dialed until it is |
| | no longer busy. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REMOTE CONNECT SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT $MBnnn |
|--------------+---------------------------------------------|
| Example: | AT $MB9600 $SB19200<CR> |
|--------------+---------------------------------------------|
| Description: | Sets maximum remote connect speed. |
|--------------+---------------------------------------------|
| í 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RETRANSMIT FAIL ACTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $Rn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $R1<CR> |
|--------------+---------------------------------------------|
| Description: | Sets whether the modem gives up on a bad |
| | connection. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » $R0 | Hang up after 12 failed retransmissions. |
|--------------+---------------------------------------------|
| í $R1 | Do not hang up after 12 failed |
| | retransmissions. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SETUP INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S29=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS29=5<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| 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<CR> |
|--------------+---------------------------------------------|
| Description: | Controls Trellis Coded Modulation. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í #T0 | Disables TCM. |
|--------------+---------------------------------------------|
| » #T1 | Enables TCM. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.25 MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $Vn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $V2 CIC<CR> |
|--------------+---------------------------------------------|
| Description: | Configures V.25bis mode. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » $V0 | Disables V.25bis. |
|--------------+---------------------------------------------|
| í $V1 | Enables V.25bis. |
|--------------+---------------------------------------------|
| í $V2 | Modem will accept one V.25bis command and |
| | will then return to AT command mode. |
|--------------+---------------------------------------------|
| í $V5 | DSR follows DTR in V.25bis command mode. |
|--------------+---------------------------------------------|
| í $V6 | DSR operates normally in V.25bis command |
| | mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42 MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &E0 <CR> |
|--------------+---------------------------------------------|
| Description: | Configures the operation of V.42 mode. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| í &E0 | Error correction disabled. |
|--------------+---------------------------------------------|
| » &E1 | V.42 set to auto-reliable. |
|--------------+---------------------------------------------|
| í &E2 | V.42 set to reliable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XOFF SEND |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] #Xn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT #X1<CR> |
|--------------+---------------------------------------------|
| Description: | Selects how XOFF signal is sent. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » #X0 | Single XOFF character sent until ready. |
|--------------+---------------------------------------------|
| í #X1 | Multiple XOFF characters sent until ready. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XON/XOFF PASS-THROUGH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &E7 O<CR> |
|--------------+---------------------------------------------|
| Description: | Selects whether XON/XOFF signals are sent |
| | to remote modem. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| » &E6 | XON/XOFF signals trapped by local modem. |
|--------------+---------------------------------------------|
| í &E7 | XON/XOFF passed through local modem. |
+------------------------------------------------------------+
Proprietary V.25bis Command Set
+------------------------------------------------------------+
| CLEAR MEMORY LOCATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | CLAn |
|--------------+---------------------------------------------|
| Example: | CLA05<CR> |
|--------------+---------------------------------------------|
| Description: | Clears the phone number in memory location |
| | nn. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCAL SERIAL PORT SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | CSPn |
|--------------+---------------------------------------------|
| Example: | CSP38400<CR> |
|--------------+---------------------------------------------|
| Description: | Sets serial port speed. |
|--------------+---------------------------------------------|
| í Command | Function |
|--------------+---------------------------------------------|
| CSP300 | Sets 300bps speed. |
|--------------+---------------------------------------------|
| CSP1200 | Sets 1200bps speed. |
|--------------+---------------------------------------------|
| CSP2400 | Sets 2400bps speed. |
|--------------+---------------------------------------------|
| CSP4800 | Sets 4800bps speed. |
|--------------+---------------------------------------------|
| CSP9600 | Sets 9600bps speed. |
|--------------+---------------------------------------------|
| CSP19200 | Sets 19.2Kbps speed. |
|--------------+---------------------------------------------|
| CSP38400 | Sets 38.4Kbps speed. |
|--------------+---------------------------------------------|
| CSP57600 | Sets 57.6Kbps speed. |
|--------------+---------------------------------------------|
| CSP115200 | Sets 115.2Kbps speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALL REQUESTED NUMBER |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | CRI<#>;n |
|--------------+---------------------------------------------|
| Example: | CRI1-303 555-1212;fubar<CR> |
|--------------+---------------------------------------------|
| Description: | Same as CRN. Dials the number given. It |
| | will ignore spaces and hyphens in the |
| | string. If the string is more than fifty |
| | characters long, a result of INV will be |
| | returned. The identification string n will |
| | be ignored. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REQUEST LISTED NUMBERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | RLN |
|--------------+---------------------------------------------|
| Example: | RLN<CR> |
|--------------+---------------------------------------------|
| Description: | Requests the modem to return the list of |
| | stored numbers. If no numbers are stored, |
| | the modem will return LSN. |
+------------------------------------------------------------+