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# PRACTICAL PERIPHERALS, INC.
PC144MT II/MC144MT II
Modem Type Data (synchronous/asynchronous)/Fax
Maximum Data Rate 14.4Kbps
Maximum Fax Rate 14.4Kbps
Data Bus External
Fax Class Class I & II
Data Modulation Bell 103A/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.32,
V.32bis
Fax Modulation ITU-T V.17, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Line in | CN1 | RS-232/422 | CN4 |
|-----------------+----------+--------------------+----------|
| Line out | CN2 | Power switch | SW1 |
|-----------------+----------+--------------------+----------|
| DC Power | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+-------+----------+-----------------------------------|
| AA | Red | On | Auto-answer enabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Off | Auto-answer disabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Blinking | Line is ringing |
|-----+-------+----------+-----------------------------------|
| RX | Red | On | Modem is receiving data |
|-----+-------+----------+-----------------------------------|
| RX | Red | Off | Modem is not receiving data |
|-----+-------+----------+-----------------------------------|
| TX | Red | On | Modem is transmitting data |
|-----+-------+----------+-----------------------------------|
| TX | Red | Off | Modem is not transmitting data |
|-----+-------+----------+-----------------------------------|
| CD | Red | On | Carrier signal detected |
|-----+-------+----------+-----------------------------------|
| CD | Red | Off | Carrier signal not detected |
|-----+-------+----------+-----------------------------------|
| CD | Red | Blinking | Modem is retraining |
|-----+-------+----------+-----------------------------------|
| OH | Red | On | Modem is off-hook |
|-----+-------+----------+-----------------------------------|
| OH | Red | Off | Modem is on-hook |
|-----+-------+----------+-----------------------------------|
| HS | Red | On | Modem connected at 4800bps or |
| | | | faster |
|-----+-------+----------+-----------------------------------|
| HS | Red | Off | Modem connected at less than |
| | | | 4800bps |
|-----+-------+----------+-----------------------------------|
| TR | Red | On | DTR signal is high |
|-----+-------+----------+-----------------------------------|
| TR | Red | Off | DTR signal is low |
|-----+-------+----------+-----------------------------------|
| MR | Red | On | Power on |
|-----+-------+----------+-----------------------------------|
| MR | Red | Off | Power off |
+------------------------------------------------------------+
Proprietary Command Set
+------------------------------------------------------------+
| COMMAND SET DISABLE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %DUMBn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT %DUMB0 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Stops modem from responding to commands. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| ยป %DUMB0 | Command set enabled. |
|--------------+---------------------------------------------|
| %DUMB1 | Command set disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REDIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] DL |
|--------------+---------------------------------------------|
| Example: | AT M0 DL<CR> |
|--------------+---------------------------------------------|
| Description: | Redials the last number called. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Example: | AT IO<CR> |
|--------------+---------------------------------------------|
| Description: | Commands modem to display information |
| | requested. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports modem model and speed. |
|--------------+---------------------------------------------|
| I1 | Reports checksum number. |
|--------------+---------------------------------------------|
| I2 | Reports checksum result. |
|--------------+---------------------------------------------|
| I3 | Reports firmware version. |
|--------------+---------------------------------------------|
| I4 | Reports current command settings. |
+------------------------------------------------------------+