MULTI-TECH SYSTEMS, INC.
MT2834ECT4/MT2834ECT4I
|
Modem Type |
Data (synchronous/asynchronous)/Fax/Voice |
|
NIC Type |
Ethernet |
|
Processor |
80486SLC |
|
Maximum Modem Transfer Rate |
28.8Kbps |
|
Maximum Fax Transfer Rate |
14.4Kbps |
|
Maximum NIC Transfer Rate |
10Mbps |
|
Processor Speed |
25MHz |
|
Data Bus |
N/A (see technical note) |
|
Topology |
Linear Bus/Star |
|
Fax Class |
Class I & II |
|
Wiring Type |
Unshielded twisted pair RG-58A/U 50ohm coaxial |
|
Data Modulation Protocol |
Bell 103A/212A ITU-T V.22, V.22bis, V.32, V.32bis, V.34 |
|
Fax Modulation Protocol |
ITU-T V.17, V.27ter, V.29 |
|
Error Correction/Compression |
MNP5, V.42, V.42bis |
|
Boot ROM |
Available |
|
Max. Onboard DRAM |
16MB |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Daughterboard connectors |
CN1 & CN1A |
Keyboard |
CN6 |
|
Line out |
CN2 |
VGA video out |
CN7 |
|
RG-58A/U 50ohm coaxial |
CN3 |
Power |
CN8 |
|
Unshielded twisted pair |
CN4 |
Flash BIOS for modem |
FLASH |
|
Serial port |
CN5 |
Power switch |
SW1 |
|
CABLE TYPE SELECTION | ||
|
» Cable Type |
JP2 | |
| » |
RG-58A/U 50ohm coaxial |
Pins 1 & 2 closed |
| » |
Unshielded twisted pair |
Pins 2 & 3 closed |
|
LOSS OF CARRIER REBOOT CONFIGURATION | ||
|
» Setting |
JP1 | |
| » |
Modem will not reboot on loss of carrier |
Open |
| » |
Modem will reboot on loss of carrier |
Closed |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
2MB |
(2) 1M x 9 |
NONE |
|
4MB |
(2) 1M x 9 |
(2) 1M x 9 |
|
8MB |
(2) 4M x 9 |
NONE |
|
16MB |
(2) 4M x 9 |
(2) 4M x 9 |
|
DIAGNOSTIC LED(S) | |||
|
LED |
Color |
Status |
Condition |
|
SD |
Red |
On |
Modem is transmitting on phone line |
|
SD |
Red |
Off |
Modem is not transmitting on phone line |
|
RD |
Red |
On |
Modem is receiving on phone line |
|
RD |
Red |
Off |
Modem is not receiving on phone line |
|
CD |
Red |
On |
Carrier signal detected |
|
CD |
Red |
Off |
Carrier signal not detected |
|
28 |
Red |
On |
Modem connected at 28.8Kbps |
|
28 |
Red |
Off |
Modem not connected at 28.8Kbps |
|
14 |
Red |
On |
Modem connected at 14.4Kbps |
|
14 |
Red |
Off |
Modem not connected at 14.4Kbps |
|
96 |
Red |
On |
Modem connected at 9600bps |
|
96 |
Red |
Off |
Modem not connected at 9600bps |
|
OH |
Red |
On |
Modem is off-hook |
|
OH |
Red |
Off |
Modem is on-hook |
|
TR |
Red |
On |
DTR signal is high |
|
TR |
Red |
Off |
DTR signal is low |
|
DIAGNOSTIC LED(S) (CON’T) | |||
|
EC |
Red |
On |
Modem connected with error correction |
|
EC |
Red |
Off |
Modem not connected with error correction |
|
EC |
Red |
Blinking |
Modem connected with error correction/compression |
|
FX |
Red |
On |
Modem is connected in FAX mode |
|
FX |
Red |
Off |
Modem is not connected in FAX mode |
|
PWR |
Red |
On |
Power is on |
|
PWR |
Red |
Off |
Power is not on |
|
TP |
Red |
On |
RG-58A/U port active |
|
TP |
Red |
Off |
UTP port active |
|
LNK |
Yellow |
On |
RG-58A/U link is good |
|
LNK |
Yellow |
Off |
RG-58A/U link is not good |
|
RX |
Red |
On |
Modem is receiving on network |
|
RX |
Red |
Off |
Modem is not receiving on network |
|
TX |
Red |
On |
Modem is transmitting on network |
|
TX |
Red |
Off |
Modem is not transmitting on network |
|
MISCELLANEOUS TECHNICAL NOTE |
|
This is a standalone network modem, designed to let other workstations share this modem and an additional one connected to the serial port. |
Proprietary AT Command Set
|
AUTO-RELIABLE TIME BUFFER CONFIGURATION | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $A n [cmds] | |
|
Example: |
AT $A1 &W <CR> | |
|
Description: |
Controls the handling of incoming data during auto-reliable time period. | |
| » |
Command |
Function |
| » |
$A0 |
Data is discarded. |
| » |
$A1 |
Data is buffered. |
|
BIT MODE | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $EB n [cmds] | |
|
Example: |
AT $EB1 E1 <CR> | |
|
Description: |
Selects 10- or 11-bit mode. | |
| » |
Command |
Function |
| » |
$EB0 |
Sets 10-bit mode. |
| » |
$EB1 |
Sets 11-bit mode. |
|
CALLBACK PARITY | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] #P n [cmds] | |
|
Example: |
AT #P0 #DB1 <CR> | |
|
Description: |
Sets the parity of the modem when in callback mode. | |
| » |
Command |
Function |
| » |
#P0 |
No parity. |
| » |
#P1 |
Odd parity. |
| » |
#P2 |
Even parity. |
|
CALLBACK PASSWORD | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] #CBN nnxxxx |
|
Example: |
AT#DB2 #CBN09snarf <CR> |
|
Description: |
Sets the callback password at memory location nn to xxxx . The password must be between 6 and 10 characters, inclusive. |
|
CALLBACK SECURITY | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] #DB n [cmds] | |
|
Example: |
AT #DB1 S0=1 <CR> | |
|
Description: |
Sets the security level of the callback function. | |
| » |
Command |
Function |
| » |
#DB0 |
Disables security and clears callback memory. |
| » |
#DB1 |
Enables remote security only. |
| » |
#DB2 |
Enables local and remote security. |
|
CALLER ID INFORMATION TRANSMISSION | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &A n [cmds] | |
|
Example: |
AT &A1 <CR> | |
|
Description: |
Controls the transmission of Caller ID information stored in the EPROM. The ID must be inserted into the Flash BIOS image before burning. | |
| » |
Command |
Function |
| » |
&A0 |
Caller ID information transmission disabled. |
| » |
&A1 |
Caller ID information transmission enabled. |
|
CALLING TONE | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $T n [cmds] | |
|
Example: |
AT $T1 DT555-1212 <CR> | |
|
Description: |
Controls the transmission of the calling tone while dialing. | |
| » |
Command |
Function |
| » |
$T0 |
Calling tone enabled. |
| » |
$T1 |
Calling tone disabled. |
|
COMMAND SET | ||
|
Type: |
Configuration | |
|
Format: |
AT &Q n | |
|
Example: |
AT &Q1 <CR> | |
|
Description: |
Selects standard Hayes or custom command sets. | |
| » |
Command |
Function |
| » |
&Q0 |
Multi-Tech custom command set enabled. |
| » |
&Q1 |
Standard Hayes command set enabled. |
|
COMPRESSION | ||
|
Type: |
Configuration | |
|
Format: |
AT &E n | |
|
Example: |
AT &E15 #L0 <CR> | |
|
Description: |
Selects data compression. | |
| » |
Command |
Function |
| » |
&E14 |
Data compression disabled. |
| » |
&E15 |
Data compression enabled. |
|
COMPRESSION MODE | ||
|
Type: |
Configuration | |
|
Format: |
AT #L n | |
|
Example: |
AT #L2 DT555-1212 <CR> | |
|
Description: |
Selects active compression protocols. | |
| » |
Command |
Function |
| » |
#L0 |
V.42 negotiation enabled. |
| » |
#L1 |
MNP negotiation enabled. |
| » |
#L2 |
LAP-M negotiation enabled. |
| » |
#L3 |
LAP-M enabled, no negotiation. |
|
CTS SIGNAL | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &RF n [cmds] | |
|
Example: |
AT &RF0 <CR> | |
|
Description: |
Selects the function of the CTS signal. | |
| » |
Command |
Function |
| » |
&RF0 |
CTS is set to RTS. |
| » |
&RF1 |
CTS is independent of RTS. |
|
DIAL STORED PHONE NUMBER | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] N n1 [N n2 , N n3 ...] |
|
Example: |
ATM0 N1N3N5 <CR> |
|
Description: |
Dials stored phone number(s). If the first number is busy, the modem will proceed to the next number in the list. |
|
DSR SIGNAL | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &SF n [cmds] | |
|
Example: |
AT &SF0 <CR> | |
|
Description: |
Selects the function of the DSR signal. | |
| » |
Command |
Function |
| » |
&SF0 |
DSR is set to CD. |
| » |
&SF1 |
DSR is independent of CD. |
|
DTR DIALING | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $D n [cmds] | |
|
Example: |
AT $D1 DT555-1212 <CR> | |
|
Description: |
Turns DTR dialing on and off. | |
| » |
Command |
Function |
| » |
$D0 |
DTR dialing disabled. |
| » |
$D1 |
DTR dialing enabled. |
|
ERASE CALLBACK NUMBER | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] #RDN n [cmds] |
|
Example: |
AT #RCBN05 #RDN05 <CR> |
|
Description: |
Erases the callback phone number at the memory location specified. |
|
ERASE CALLBACK PASSWORD | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] #RCBN n [cmds] |
|
Example: |
AT #RCBN05 #RDN05 <CR> |
|
Description: |
Erases the callback password at the memory location specified. |
|
ESCAPE SEQUENCE - OUT OF BAND | |
|
Type: |
Immediate |
|
Format: |
<BREAK> AT [cmds] <CR> |
|
Example: |
<BREAK> AT #F1 <CR> |
|
Description: |
Puts the modem in Command Mode. |
|
Notes: |
Do not precede this command with AT. <BREAK> refers to the hardware modem break signal. |
|
FALLBACK MODE | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] #F n [cmds] | |
|
Example: |
AT #F1 O <CR> | |
|
Description: |
Sets direction of fallback. | |
| » |
Command |
Function |
| » |
#F0 |
Fallback disabled. |
| » |
#F1 |
Fallback from 28.8Kbps to 2400bps as line quality degrades. |
| » |
#F2 |
Fallback from 2400bps to 28.8Kbps as line quality improves. |
|
FLOW CONTROL | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &E n [cmds] | |
|
Example: |
AT &E13 <CR> | |
|
Description: |
Selects flow control. | |
| » |
Command |
Function |
| » |
&E12 |
Flow control disabled. |
| » |
&E13 |
Flow control enabled. |
|
FLOW CONTROL - ENQ/ACK | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &E n [cmds] | |
|
Example: |
AT &E9 <CR> | |
|
Description: |
Selects ENQ/ACK pacing. | |
| » |
Command |
Function |
| » |
&E8 |
Enables ENQ/ACK pacing. |
| » |
&E9 |
Disables ENQ/ACK pacing. |
|
FLOW CONTROL IN NORMAL MODE | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &E n [cmds] | |
|
Example: |
AT &E11 O <CR> | |
|
Description: |
Selects XON/XOFF flow control for non-error-correcting connections. | |
| » |
Command |
Function |
| » |
&E10 |
XON/XOFF disabled for non-error-correcting connections. |
| » |
&E11 |
XON/XOFF enabled for non-error-correcting connections. |
|
FLOW CONTROL TYPE | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &E n [cmds] | |
|
Example: |
AT &E4 &W <CR> | |
|
Description: |
Sets type of flow control used by modem. | |
| » |
Command |
Function |
| » |
&E3 |
Flow control disabled. |
| » |
&E4 |
CTS/RTS flow control enabled. |
| » |
&E5 |
XON/XOFF flow control enabled. |
|
HANDSHAKE ATTEMPTS | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] #A n [cmds] | |
|
Example: |
AT #A1 #L3 <CR> | |
|
Description: |
Configures the initial handshake phase. | |
| » |
Command |
Function |
|
#A0 |
Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps. | |
|
#A1 |
Attempts only 28.8Kbps. | |
|
#A2 |
Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps. | |
|
#A3 |
Attempts in order: 2400bps, 1200bps, 300bps. | |
|
HELP SCREENS | |
|
Type: |
Immediate |
|
Format: |
AT $H n |
|
Example: |
AT $H1 <CR> |
|
Description: |
Shows modem help screens. |
|
Command |
Function |
|
$H1 |
Shows help screen 1. |
|
$H2 |
Shows help screen 2. |
|
$H3 |
Shows help screen 3. |
|
LIST CONFIGURATION | |
|
Type: |
Immediate |
|
Format: |
AT L n |
|
Example: |
AT L5 <CR> |
|
Description: |
Lists modem configuration. |
|
Command |
Function |
|
L |
Lists all stored phone numbers. |
|
L5 |
Lists all settings. |
|
L6 |
Lists the values of all S-registers. |
|
L7 |
Lists extended parameters. |
|
L8 |
Lists current diagnostics. |
|
LOCAL SERIAL PORT SPEED | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $SB nnn [cmds] | |
|
Example: |
AT $MB9600 $SB19200 <CR> | |
|
Description: |
Sets serial port speed. | |
| » |
Command |
Function |
|
$SB300 |
Sets 300bps speed. | |
|
$SB1200 |
Sets 1200bps speed. | |
|
$SB2400 |
Sets 2400bps speed. | |
|
$SB4800 |
Sets 4800bps speed. | |
|
$SB9600 |
Sets 9600bps speed. | |
|
$SB19200 |
Sets 19.2Kbps speed. | |
|
$SB38400 |
Sets 38.4Kbps speed. | |
|
$SB57600 |
Sets 57.6Kbps speed. | |
|
$SB115200 |
Sets 115.2Kbps speed. | |
|
LOCK SERIAL PORT | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $BA n [cmds] | |
|
Example: |
AT $SB57600 $BA0 <CR> | |
|
Description: |
Sets operation of serial port speed. | |
| » |
Command |
Function |
| » |
$BA0 |
Serial speed locked at rate set by $SB. |
| » |
$BA1 |
Serial speed follows connect speed, ignoring $SB. |
|
LOGIN PASSWORD | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] #I xxxx |
|
Example: |
AT #IMicroHouse <CR> |
|
Description: |
Sets the login password to xxxx . The password must be between 6 and 10 characters, case sensitive. It defaults to MULTI-TECH. |
|
MAXIMUM BLOCK SIZE FOR TRANSMISSION | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &BS n [cmds] | |
|
Example: |
AT &BS1 &MB28800 <CR> | |
|
Description: |
Sets the maximum transmittable block size. | |
| » |
Command |
Function |
| » |
&BS0 |
Maximum block size is 64 characters. |
| » |
&BS1 |
Maximum block size is 128 characters for LAP-M, and 256 characters for MNP. |
|
REDIAL | |
|
Type: |
Immediate |
|
Format: |
ATA: |
|
Example: |
AT A: <CR> |
|
Description: |
Redials the last number dialed until it is no longer busy. |
|
REMOTE CONNECT SPEED | ||
|
Type: |
Configuration | |
|
Format: |
AT $MB nnn | |
|
Example: |
AT $MB9600 $SB19200 <CR> | |
|
Description: |
Sets maximum remote connect speed. | |
| » |
Command |
Function |
|
$MB75 |
Sets V.23 (1200bps/75bps bi-directional). | |
|
$MB300 |
Sets 300bps connect. | |
|
$MB1200 |
Sets 1200bps connect. | |
|
$MB2400 |
Sets 2400bps connect. | |
|
$MB4800 |
Sets 4800bps connect. | |
|
$MB9600 |
Sets 9600bps connect. | |
|
$MB14400 |
Sets 14.4Kbps connect. | |
|
$MB19200 |
Sets 19.2Kbps connect. | |
|
$MB28800 |
Sets 28.8Kbps connect. | |
|
RETRANSMIT FAIL ACTION | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $R n [cmds] | |
|
Example: |
AT $R1 <CR> | |
|
Description: |
Sets whether the modem gives up on a bad connection. | |
| » |
Command |
Function |
| » |
$R0 |
Hang up after 12 failed retransmissions. |
| » |
$R1 |
Do not hang up after 12 failed retransmissions. |
|
SETUP PASSWORD | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] #S xxxx |
|
Example: |
AT #SsNaFu <CR> |
|
Description: |
Sets the setup password to xxxx . The password must be between 6 and 10 characters, case sensitive. It defaults to MODEMSETUP. |
|
STORE PHONE NUMBER IN NVRAM | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] D <#> N n [dialstring] |
|
Example: |
AT D555-1212N1 <CR> |
|
Description: |
Stores a phone number in the modem’s memory. |
|
TRELLIS MODULATION | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] #T n [cmds] | |
|
Example: |
AT #T1 <CR> | |
|
Description: |
Controls Trellis Coded Modulation. | |
| » |
Command |
Function |
| » |
#T0 |
Disables TCM. |
| » |
#T1 |
Enables TCM. |
|
UUCP SPOOFING | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] $SP n [cmds] | |
|
Example: |
AT $SP1 O <CR> | |
|
Description: |
Controls the UUCP spoofing function. | |
| » |
Command |
Function |
| » |
$SP0 |
Spoofing disabled. |
| » |
$SP1 |
Spoofing enabled. |
|
XON/XOFF PASS-THROUGH | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] &E n [cmds] | |
|
Example: |
AT &E7 O <CR> | |
|
Description: |
Selects whether XON/XOFF signals are sent to remote modem. | |
| » |
Command |
Function |
| » |
&E6 |
XON/XOFF signals trapped by local modem. |
| » |
&E7 |
XON/XOFF passed through local modem. |
|
XOFF SEND | ||
|
Type: |
Configuration | |
|
Format: |
AT [cmds] #X n [cmds] | |
|
Example: |
AT #X1 <CR> | |
|
Description: |
Selects how XOFF signal is sent. | |
| » |
Command |
Function |
| » |
#X0 |
Single XOFF character sent until ready. |
| » |
#X1 |
Multiple XOFF characters sent until ready. |