MULTITECH SYSTEMS, INC.
MT2834ZPX/MT2834ZPXI
|
Modem Type |
Data (synchronous/asynchronous)/Fax |
|
Maximum Data Rate |
28.8Kbps |
|
Maximum Fax Rate |
14.4Kbps |
|
Data Bus |
16-bit ISA |
|
Fax Class |
Class I & II |
|
Data Modulation Protocol |
Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34 AT&T V.32terbo |
|
Fax Modulation Protocol |
ITU-T V.17, V.21CH2, V.27ter, V.29 |
|
Error Correction/Compression |
MNP2-5, V.42, V.42bis |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Line-in |
CN1 |
Line-out |
CN2 |
|
INTERRUPT SELECTION | |||||
|
IRQ |
JP3 |
JP4 |
JP5 |
JP6 |
JP7 |
|
í 3 |
Closed |
Open |
Open |
Open |
Open |
|
2/9 |
Open |
Open |
Open |
Open |
Closed |
|
4 |
Open |
Closed |
Open |
Open |
Open |
|
5 |
Open |
Open |
Closed |
Open |
Open |
|
7 |
Open |
Open |
Open |
Closed |
Open |
|
ADDRESS SELECTION | ||
|
Address |
JP1 |
JP2 |
|
í COM2: |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
COM1: |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
COM3: |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
COM4: |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Proprietary 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. |
|
Command |
Function |
|
í $A0 |
Data is discarded. |
|
$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. |
|
Command |
Function |
|
í $EB0 |
Sets 10-bit mode. |
|
$EB1 |
Sets 11-bit mode. |
|
COMMAND ESCAPE TYPE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] %En [cmds] |
|
Example: |
AT %E3 &W <CR> |
|
Description: |
Sets type and response of command escape sequence. |
|
Command |
Function |
|
%E0 |
Command escape disabled. |
|
í %E1 |
TIES escape (+++AT...) |
|
%E2 |
<BREAK> AT method. |
|
%E3 |
Both TIES and BREAK methods. |
|
%E4 |
Escape disabled; no OK response to +++. |
|
%E5 |
Escape disabled; OK response to +++. |
|
COMMAND SET | |
|
Type: |
Configuration |
|
Format: |
AT &Qn |
|
Example: |
AT &Q1 <CR> |
|
Description: |
Selects standard Hayes or custom command sets. |
|
Command |
Function |
|
í &Q0 |
Multi-Tech custom command set enabled. |
|
&Q1 |
Standard Hayes command set enabled. |
|
COMPRESSION | |
|
Type: |
Configuration |
|
Format: |
AT &En |
|
Example: |
AT &E15 #L0 <CR> |
|
Description: |
Selects data compression. |
|
Command |
Function |
|
&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. |
|
Command |
Function |
|
í #L0 |
V.42 negotiation enabled. |
|
#L1 |
MNP negotiation enabled. |
|
#L2 |
LAP-M negotiation enabled. |
|
#L3 |
LAP-M enabled, no negotiation. |
|
CTS SIGNAL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &RFn [cmds] |
|
Example: |
AT &RF0 <CR> |
|
Description: |
Selects the function of the CTS signal. |
|
Command |
Function |
|
&RF0 |
CTS is set to RTS. |
|
í &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. |
|
DSR SIGNAL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &SFn [cmds] |
|
Example: |
AT &SF0 <CR> |
|
Description: |
Selects the function of the DSR signal. |
|
Command |
Function |
|
í &SF0 |
DSR is set to CD. |
|
&SF1 |
DSR is independent of CD. |
|
DTR DIALING | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] $Dn [cmds] |
|
Example: |
AT $D1 DT555-1212 <CR> |
|
Description: |
Turns DTR dialing on and off. |
|
Command |
Function |
|
í $D0 |
DTR dialing disabled. |
|
$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. |
|
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. |
|
Command |
Function |
|
$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. |
|
Command |
Function |
|
&F |
Reloads defaults by setting. (Immediate, see below.) |
|
í &F8 |
Sets &F to read factory defaults from ROM, and disables NVRAM write protect. |
|
&F9 |
Sets &F to read defaults from NVRAM, and enables write-protect. |
|
FAILED PASSWORD ATTEMPTS | |
|
Type: |
Register |
|
Format: |
AT [cmds] S26? |
|
Example: |
ATS26? <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. |
|
Command |
Function |
|
#F0 |
Fallback disabled. |
|
#F1 |
Fallback from 28.8Kbps to 2400bps as line quality degrades. |
|
í #F2 |
Fallback from 2400bps to 28.8Kbps as line quality improves. |
|
FLOW CONTROL NORMAL MODE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &En [cmds] |
|
Example: |
AT &E11 O <CR> |
|
Description: |
Selects normal flow control. |
|
Command |
Function |
|
í &E10 |
Normal mode disabled. |
|
&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. |
|
Command |
Function |
|
&E3 |
Flow control disabled. |
|
í &E4 |
CTS/RTS flow control enabled. |
|
&E5 |
XON/XOFF flow control enabled. |
|
HANDSHAKE ATTEMPTS | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] #An [cmds] |
|
Example: |
AT #A1 #L3 <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 $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 L9 O <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. |
|
L9 |
Displays signal strength. |
|
L10 |
Displays signal-to-noise ratio. |
|
L11 |
Displays noise strength. |
|
LOCAL SERIAL PORT SPEED | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] $SBnnn [cmds] |
|
Example: |
AT $MB9600 $SB19200 <CR> |
|
Description: |
Sets serial port speed. |
|
Command |
Function |
|
$SB300 |
Sets 300baud speed. |
|
$SB1200 |
Sets 1200baud speed. |
|
$SB2400 |
Sets 2400baud speed. |
|
$SB4800 |
Sets 4800baud speed. |
|
$SB9600 |
Sets 9600baud speed. |
|
$SB19200 |
Sets 19.2Kbaud speed. |
|
$SB38400 |
Sets 38.4Kbaud speed. |
|
$SB57600 |
Sets 57.6Kbaud speed. |
|
$SB115200 |
Sets 115.2Kbaud speed. |
|
LOCK SERIAL PORT | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] $BAn [cmds] |
|
Example: |
AT $SB57600 $BA0 <CR> |
|
Description: |
Sets operation of serial port speed. |
|
Command |
Function |
|
í $BA0 |
Serial speed locked at rate set by $SB. |
|
$BA1 |
Serial speed follows connect speed, ignoring $SB. |
|
LOGIN PASSWORD | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] #Ixxxx |
|
Example: |
AT #IMicroHouse <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. |
|
Command |
Function |
|
&BS0 |
Maximum block size is 64 characters. |
|
í &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 &E9 <CR> |
|
Description: |
Selects pacing. |
|
Command |
Function |
|
í &E8 |
Enables pacing. |
|
&E9 |
Disables pacing. |
|
PACING - ENQ/ACK | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &En [cmds] |
|
Example: |
AT &E13 <CR> |
|
Description: |
Selects ENQ/ACK pacing. |
|
Command |
Function |
|
&E12 |
Disables ENQ/ACK pacing. |
|
í &E13 |
Enables 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. |
|
Command |
Function |
|
$MB75 |
Sets V.23 (1200bps/75bps bi-directional). |
|
$MB300 |
Sets 300bps connect. |
|
$MB1200 |
Sets 1200bps connect. |
|
$MB2400 |
Sets 2400bps connect. |
|
$MB4800 |
Sets 4800bps connect. |
|
$MB9600 |
Sets 9600bps connect. |
|
$MB14400 |
Sets 14.4Kbps connect. |
|
$MB19200 |
Sets 19.2Kbps connect. |
|
$MB28800 |
Sets 28.8Kbps connect. |
|
RETRANSMIT FAIL ACTION | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] $Rn [cmds] |
|
Example: |
AT $R1 <CR> |
|
Description: |
Sets whether the modem gives up on a bad connection. |
|
Command |
Function |
|
í $R0 |
Hang up after 12 failed retransmissions. |
|
$R1 |
Do not hang up after 12 failed retransmissions. |
|
SETUP INACTIVITY TIMER | |
|
Type: |
Register |
|
Format: |
AT [cmds] S29=n [cmds] |
|
Example: |
ATS29=5 <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 modems 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. |
|
Command |
Function |
|
#T0 |
Disables TCM. |
|
í #T1 |
Enables TCM. |
|
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. |
|
Command |
Function |
|
í #V0 |
V.32terbo enabled. |
|
#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. |
|
Command |
Function |
|
&E0 |
Error correction disabled. |
|
í &E1 |
V.42 set to auto-reliable. |
|
&E2 |
V.42 set to reliable. |
|
XOFF SEND | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] #Xn [cmds] |
|
Example: |
AT #X1 <CR> |
|
Description: |
Selects how XOFF signal is sent. |
|
Command |
Function |
|
í #X0 |
Single XOFF character sent until ready. |
|
#X1 |
Multiple XOFF characters sent until ready. |
|
XON/XOFF PASS-THROUGH | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] &En [cmds] |
|
Example: |
AT &E7 O <CR> |
|
Description: |
Selects whether XON/XOFF signals are sent to remote modem. |
|
Command |
Function |
|
í &E6 |
XON/XOFF signals trapped by local modem. |
|
&E7 |
XON/XOFF passed through local modem. |