MULTITECH SYSTEMS, INC.
MT1932PCS, MT1932PCSI
Modem Type | Data (synchronous/asynchronous)/Fax/Simultaneous voice |
Maximum Data Rate | 19.2Kbps |
Maximum Fax Rate | 14.4Kbps |
Data Bus | External |
Fax Class | Class I & II |
Data Modulation Protocol | Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis AT&T V.32terbo Multitech MSP |
Fax Modulation Protocol | ITU-T V.17, V.21CH2, V.27ter, V.29 |
Error Correction/Compression | MNP2-5, V.42, V.42bis |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Handset in | CN1 | Headset in | CN5 |
Line out | CN2 | Microphone | MIC |
RS-232/422 | CN3 | Power switch | SW4 |
DC power | CN4 |
DTR MODE | |
í Mode | SW1/1 |
í DTR normal | On |
í DTR forced high | Off |
FLOW CONTROL | ||
í Mode | Async/Sync | SW1/2 |
í Hardware flow control | Async | On |
í Software flow control | Async | Off |
í SDLC | Sync | On |
í BSC | Sync | Off |
RESULT CODES and LINE ATTENUATION | ||
í Mode | Switched/Leased | SW1/3 |
í Result codes enabled | Switched | Off |
í Result codes disabled | Switched | On |
í Transmit at 0dB | Leased | Off |
í Transmit at -10dB | Leased | On |
UUCP SPOOFING and AS/400 MODE | ||
í Mode | Async/Sync | SW1/4 |
í 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 |
í Auto-answer enabled | Switched | On |
í Auto-answer disabled | Switched | Off |
í Answer mode | Leased | On |
í Originate mode | Leased | Off |
EFFICIENCY MODE and SLAVE CLOCK | ||
í Mode | Async/Sync | SW1/6 |
í Modem set to maximum efficiency | Async | On |
í Modem not set to maximum efficiency | Async | Off |
í Clock controlled remotely | Sync | On |
í Clock controlled locally | Sync | Off |
RTS MODE | |
í Mode | SW1/7 |
í RTS forced high | Off |
í RTS normal | On |
COMMAND MODE | |
í Mode | SW1/8 |
í Command mode enabled | Off |
í Command mode disabled | On |
LOOPBACK MODE | |
í Mode | SW1/9 |
í Remote loopback | Off |
í Local loopback | On |
LINE TYPE | ||
í Type | SW1/10 | SW5 |
í Switched | On | On |
í Leased | Off | Off |
RESULT CODE TYPE and CLOCK SOURCE | ||
í Mode | Async/Sync | SW1/11 |
í Multitech result codes | Async | Off |
í AT result codes | Async | On |
í Internal clock | Sync | Off |
í External clock | Sync | On |
ASYNCHRONOUS/SYNCHRONOUS MODE | |
í Mode | SW1/12 |
í Asynchronous | Off |
í Synchronous | On |
OPERATION SPEED | ||
í Speed | SW2/1 | SW2/2 |
í 19.2Kbps | On | On |
í 14.4Kbps | Off | On |
í 9600bps | On | Off |
í 2400bps | Off | Off |
CD/DSR MODE | |
Mode | SW2/3 |
í CD and DSR normal | On |
í CD and DSR forced high | Off |
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 |
19.2 | Red | On | Modem connected at 19.2Kbps |
19.2 | Red | Off | Modem not connected at 19.2Kbps |
14.4 | Red | On | Modem connected at 14.4Kbps |
14.4 | Red | Off | Modem not connected at 14.4Kbps |
96 | Red | On | Modem connected at 9600bps |
96 | Red | Off | Modem not connected at 9600bps |
96 | Red | On | Modem connected at 9600bps |
96 | Red | Off | Modem not connected at 9600bps |
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 |
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
AMBIENT NOISE SENSITIVITY | |
Type: | Configuration |
Format: | AT [cmds] >HVn [cmds] |
Example: | AT >HV10 >C0 <CR> |
Default: | 7 |
Range: | 0-14 |
Description: | Sets the modem’s sensitivity to ambient noise, with 0 being the most sensitive. |
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 |
í $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 |
í $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 |
í #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 |
í #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. |
í %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 |
í &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. |
í &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 |
í #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. |
í &RF1 | CTS is independent of RTS. |
DETECTION MODE | |
Type: | Configuration |
Format: | AT [cmds] >DTn [cmds] |
Example: | AT >DT1 <CR> |
Description: | Sets the responses the modem will detect. |
í í Command | Function |
í >DT0 | Detection disabled. |
í >DT1 | DTMF detection enabled. |
í >DT2 | All signals will be detected. |
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 |
í $VD0 | Disables voice/data mode. |
í $VD1 | Enables voice/data mode. |
DSP INPUT | |
Type: | Configuration |
Format: | AT [cmds] >DIn [cmds] |
Example: | AT >DI4 >DO6 <CR> |
Description: | Sets the input source of the digital signal processor. |
í í Command | Function |
í >DI0 | Input disabled. |
í >DI1 | Input from line in. |
í >DI2 | Input from handset. |
í >DI3 | Input from phone. |
í >DI4 | Input from PC. |
í >DI5 | Input from voicemail. |
í >DI6 | Input from Digital Simultaneous Voice Mode session. |
DSP OUTPUT | |
Type: | Configuration |
Format: | AT [cmds] >DOn [cmds] |
Example: | AT >DI5 >DO3 <CR> |
Description: | Sets the output device of the digital signal processor. |
í í Command | Function |
í >DO0 | Output disabled. |
í >DO1 | Output to line out. |
í >DO2 | Output to handset. |
í >DO3 | Output to phone. |
í >DO4 | Output to PC. |
í >DO5 | Output to voicemail. |
í >DO6 | Output to Digital Simultaneous Voice Mode session. |
DSR SIGNAL | |
Type: | Configuration |
Format: | AT [cmds] &SFn [cmds] |
Example: | AT &SF0 <CR> |
Description: | Selects the function of the DSR signal. |
í Command | Function |
í &SF0 | DSR is set to CD. |
í &SF1 | DSR is independent of CD. |
DSVD TALK ANYTIME™ | |
Type: | Configuration |
Format: | AT [cmds] >Cn [cmds] |
Example: | AT >C1 O <CR> |
Description: | Enables DSVD (Digital Simultaneous Voice Data) connection. |
í Command | Function |
í >C0 | Talk Anytime™ enabled. |
í >C1 | Talk Anytime™ disabled. |
DSVD | |
Type: | Immediate |
Format: | AT [cmds] >VDn [cmds] |
Example: | AT >VD1 O <CR> |
Description: | Activates DSVD (Digital Simultaneous Voice Data) connection. |
í Command | Function |
í >VD0 | Deactivates DSVD. |
í >VD1 | Activates DSVD. |
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 |
í $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. |
í $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.) |
í &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 19.2Kbps to 2400bps as line quality degrades. |
í #F2 | Fallback from 2400bps to 19.2Kbps 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 |
í &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. |
í &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: 19.2Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps. |
#A1 | Attempts only 19.2Kbps. |
#A2 | Attempts in order: 19.2Kbps, 14.4Kbps, 12Kbps, 9600bps, 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. |
LINE CONNECTION | |
Type: | Configuration |
Format: | AT [cmds] >PHn [cmds] |
Example: | AT >PH1 <CR> |
Description: | Selects the operation mode of the modem. |
í Command | Function |
í >PH0 | Modem is in data mode. |
í >PH1 | Modem is in voice mode. |
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 |
í $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. |
í &BS1 | Maximum block size is 128 characters for LAP-M, and 256 characters for MNP. |
MICROPHONE | |
Type: | Configuration |
Format: | AT [cmds] >Mn>MVn [cmds] |
Example: | AT >M2>MV5 <CR> |
Description: | Turns the microphone of the attached telephone handset on or off. |
Note: | An >MV command must be issued on the same line. |
í Command | Function |
í >M0 | Disables microphone. |
í >M2 | Enables microphone. |
MICROPHONE SENSITIVITY | |
Type: | Configuration |
Format: | AT [cmds] >MVn [cmds] |
Example: | AT >MV6 <CR> |
Default: | None |
Range: | 0-14 |
Description: | Sets the microphone’s sensitivity, with 0 being the most sensitive. |
MSP MODE | |
Type: | Configuration |
Format: | AT [cmds] %Pn [cmds] |
Example: | AT %P1 <CR> |
Description: | Enables or disables Multitech Supervisory Protocol (MSP). |
í Command | Function |
í %P0 | MSP disabled. |
í %P1 | MSP enabled. |
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. |
í &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 |
í &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. |
$MB14400 | Sets 14.4Kbps connect. |
$MB19200 | Sets 19.2Kbps 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 |
í $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. |
SPEAKER | |
Type: | Configuration |
Format: | AT [cmds] >Sn>SVn [cmds] |
Example: | AT >S2>SV5 <CR> |
Description: | Turns the speaker of the attached telephone handset on or off. |
Note: | An >SV command must be issued on the same line. |
í Command | Function |
í >S0 | Disables speaker. |
í >S2 | Enables speaker. |
SPEAKER VOLUME | |
Type: | Configuration |
Format: | AT [cmds] >SVn [cmds] |
Example: | AT >SV6 <CR> |
Default: | None |
Range: | 0-14 |
Description: | Sets the speaker’s volume, with 0 being the most sensitive. |
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. |
í #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 |
í $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.32terbo CONTROL | |
Type: | Configuration |
Format: | AT [cmds] #Vn [cmds] |
Example: | AT #V1 DT555-1212 <CR> |
Description: | Controls the V.32terbo protocol in answer mode. |
í Command | Function |
í #V0 | V.32terbo enabled. |
í #V1 | V.32terbo disabled. |
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. |
í &E1 | V.42 set to auto-reliable. |
í &E2 | V.42 set to reliable. |
VOICE BANDWIDTH | |
Type: | Configuration |
Format: | AT [cmds] >An [cmds] |
Example: | AT >A0 <CR> |
Description: | Sets the bandwidth reserved for voice transmission. |
í Command | Function |
í >A0 | Voice bandwidth set to 9600bps. |
í >A1 | Voice bandwidth set to 16Kbps. |
XOFF SEND | |
Type: | Configuration |
Format: | AT [cmds] #Xn [cmds] |
Example: | AT #X1 <CR> |
Description: | Selects how XOFF signal is sent. |
í Command | Function |
í #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 |
í &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. |