PRACTICAL PERIPHERALS, INC.
PM2400SA
|
Card Type |
Fax, Modem (asynchronous) |
|
Chip Set |
Rockwell |
|
Maximum Data Rate |
2400bps |
|
Data Bus |
External |
|
Data Modulation Protocol |
Bell 103/212A ITU-T V.22, V.22bis |
V2036
|
DIAGNOSTIC LED(S) | |||
|
LED |
Color |
Status |
Condition |
|
MR |
Red |
On |
Power is on |
|
MR |
Red |
Off |
Power is off |
|
TX |
Red |
On |
Modem is transmitting data |
|
TX |
Red |
Off |
Modem is not transmitting data |
|
RX |
Red |
On |
Modem is receiving data |
|
RX |
Red |
Off |
Modem is not receiving data |
|
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 |
|
AA |
Red |
On |
Auto-answer enabled |
|
AA |
Red |
Off |
Auto-answer disabled |
|
AA |
Red |
Blinking |
Phone is ringing |
|
HS |
Red |
On |
Modem is operating at 4800bps or faster |
|
HS |
Red |
Off |
Modem is operating at slower than 4800bps |
|
MISCELLANEOUS TECHNICAL NOTES |
Note: Diagram not available. This modem is asynchronous only, but if your software supports synchronous operation the modem will run synchronous mode. |
Proprietary AT Command Set
See document V2037 for complete command summary.
|
BIT-MAPPED REGISTER S21 | ||
|
Format |
AT [cmds] S21=n [cmds] | |
|
Default: |
Unidentified | |
|
Range: |
0-253 | |
|
Unit: |
Bit-mapped | |
|
Description: |
Selects jack type, CTS*/DCD/DSR* signals, low DTR action, and the long space disconnect function. | |
|
Bit |
Value |
Function |
|
0 |
í 01 |
Selects RJ-11, RJ-41S, or RJ45S jack Selects RJ-12 or RJ-13 jack |
|
1 |
í 0 |
Not used |
|
2 |
0 1 |
*Software driven *Software driven |
|
4, 3 |
í 0001 10 11 |
DTR signal ignored Modem goes to command mode on low DTR Modem disconnects on low DTR; Auto-Answer is disabled Modem is initialized on low DTR |
|
5 |
í 01 |
DCD forced high DCD normal |
|
6 |
0 1 |
*Software driven *Software driven |
|
7 |
í 01 |
Long space disconnect function disabled Long space disconnect function enabled |
|
BIT-MAPPED REGISTER S23 | ||
|
Format |
AT [cmds] S23=n [cmds] | |
|
Default: |
Unidentified | |
|
Range: |
0-247 | |
|
Unit: |
Bit-mapped | |
|
Description: |
Grants/denies remote digital loopback*, controls DTE rate and parity, and sets guard tone | |
|
Bit |
Value |
Function |
|
0 |
0 1 |
*Software driven *Software driven |
|
2, 1 |
00 01 10 í 11 |
Sets serial port speed to 0-300bps Not used Sets serial port speed to 1200bps Sets serial port speed to 2400bps |
|
3 |
í 0 |
Not used |
|
5, 4 |
í 0001 10 11 |
Parity even Space parity Parity odd Mark or no parity |
|
7, 6 |
í 0001 10 11 |
Guard tone disabled Guard tone 550Hz enabled Guard tone 1800Hz enabled Not used |
|
BIT-MAPPED REGISTER S27 | ||
|
Format |
AT [cmds] S27=n [cmds] | |
|
Default: |
Unidentified | |
|
Range: |
0-115 | |
|
Unit: |
Bit-mapped | |
|
Description: |
Selects synchronous*/asynchronous mode, clock source*, and ITU-T/Bell modes. | |
|
Bit |
Value |
Function |
|
1, 0 |
í 0001 10 11 |
Asynchronous mode *Software driven *Software driven *Software driven |
|
3, 2 |
í 00 |
Not used |
|
5, 4 |
00 01 10 11 |
*Software driven *Software driven *Software driven *Software driven |
|
6 |
0 í 1 |
ITU/T mode Bell mode |
|
SOFTWARE DRIVEN COMMANDS | ||
|
Type: |
Configuration | |
|
Note: |
These commands are used by software that allows the modem to operate in synchronous mode, this modem doesnt have the hardware to support synchronous mode. | |
|
Command |
Function | |
|
Unidentified |
Smart/Dumb mode options | |
|
&S |
Ready To Send/Clear To Send options | |
|
&R |
Data Set Ready options | |
|
&X |
DTE transmit clock source | |