ZOOM TELEPHONICS, INC.
VFD X
|
Modem Type |
Data (synchronous/asynchronous)/Fax/Voice |
|
Maximum Data Rate |
2400bps |
|
Maximum Fax Rate |
9600bps |
|
Data Bus |
External |
|
Fax Class |
Class I & II |
|
Data Modulation Protocol |
Unidentified |
|
Fax Modulation Protocol |
Unidentified |
|
Error Correction/Compression |
MNP5, V.42, V.42bis |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Line out |
CN1 |
DC power |
CN5 |
|
Line in |
CN2 |
Speaker |
CN6 |
|
Digital control (Proprietary |
CN3 |
Power switch |
SW1 |
|
RS-232/422 |
CN4 | ||
|
DIAGNOSTIC LED(S) | |||
|
LED |
Color |
Status |
Condition |
|
VM |
Red |
On/Blinking |
Unread stored messages exist |
|
VM |
Red |
Off |
No unread stored messages exist |
|
AA |
Red |
On |
Auto-answer enabled |
|
AA |
Red |
Off |
Auto-answer disabled |
|
CD |
Red |
On |
Carrier signal detected |
|
CD |
Red |
Off |
Carrier signal not detected |
|
OH |
Red |
On |
Modem is off-hook |
|
OH |
Red |
Off |
Modem is on-hook |
|
RD |
Red |
Blinking |
Modem is receiving data |
|
RD |
Red |
Off |
Modem is not receiving data |
|
TD |
Red |
Blinking |
Modem is transmitting data |
|
TD |
Red |
Off |
Modem is not transmitting data |
|
TR |
Red |
On |
DTR signal is high |
|
TR |
Red |
Off |
DTR signal is low |
|
MR |
Red |
On |
Power is on |
|
MR |
Red |
Off |
Power is off |
Proprietary AT Command Set
|
AUTO-RETRAIN | |
|
Type: |
Configuration |
|
Format: |
AT %En |
|
Example: |
AT %E1 <CR> |
|
Description: |
Selects auto-retrain mode. |
| Command |
Function |
| %E0 |
Auto-retrain disabled. |
| %E1 |
Auto-retrain enabled. |
|
BREAK SEND | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Bn [cmds] |
|
Example: |
AT \B3 &W <CR> |
|
Range: |
1-9 |
|
Default |
3 |
|
Unit: |
.1 second |
|
Description: |
Sends break to modem. |
|
COMPRESSION | |
|
Type: |
Configuration |
|
Format: |
AT %Cn |
|
Example: |
AT I2 %C1 &S0 <CR> |
|
Description: |
Selects data compression. |
| Command |
Function |
| %C0 |
Data compression disabled. |
| %C1 |
MNP5 enabled. |
| %C2 |
V.42bis enabled. |
| %C3 |
MNP5 and V.42bis enabled. |
|
CONNECT MODE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Nn [cmds] |
|
Example: |
AT \N1 DT555-1212 <CR> |
|
Description: |
Sets connect mode. |
|
Command |
Function |
| \N1 |
Direct mode. |
| \N0 |
Normal mode. |
| \N2 |
Reliable mode. |
| \N3 |
Auto-reliable mode. |
| \N4 |
V.42 reliable mode. |
| \N5 |
MNP error correction mode. |
|
FLOW CONTROL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Gn [cmds] |
|
Example: |
AT \G1 &K3 <CR> |
|
Description: |
Selects modem port flow control. |
| Command |
Function |
| \G0 |
Flow control disabled. |
| \G1 |
Flow control enabled. |
|
LINE SIGNAL LEVEL | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] %L [cmds] |
|
Example: |
AT %L &W <CR> |
|
Unit: |
-dBm |
|
Description: |
Returns received line signal level. |
|
LOCK SERIAL PORT | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Jn [cmds] |
|
Example: |
AT %L3 %B14 \J0<CR> |
|
Description: |
Sets operation of serial port speed. |
| Command |
Function |
| \J0 |
Serial speed locked. |
| \J1 |
Serial speed follows connect speed. |
|
MAXIMUM BLOCK SIZE FOR TRANSMISSION | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \An [cmds] |
|
Example: |
AT \A3 %C1 <CR> |
|
Description: |
Sets the maximum transmittable block size. |
| Command |
Function |
| \A0 |
MNP block size is 64 characters. |
| \A1 |
MNP block size is 128 characters. |
| \A2 |
MNP block size is 192 characters. |
| \A3 |
MNP block size is 256 characters. |
|
MNP STREAM/BLOCK MODE | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] \Ln [cmds] |
|
Example: |
AT \L1 DT555-1212 <CR> |
|
Description: |
Selects the transfer mode for MNP. |
| Command |
Function |
| \L0 |
Stream mode for MNP enabled. |
| \L1 |
Block mode for MNP enabled. |
|
REPORT SIGNAL QUALITY | |
|
Type: |
Configuration |
|
Format: |
AT [cmds] %Q [cmds] |
|
Example: |
AT %Q &W <CR> |
|
Description: |
Reports signal quality. |
|
REPORT MODEM STATUS | |
|
Type: |
Immediate |
|
Format: |
AT [cmds] \S [cmds] |
|
Example: |
AT \S &W <CR> |
|
Description: |
Displays current modem configuration. |