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# PRACTICAL PERIPHERALS, INC.
MC288MT II V.34/PC288MT II V.34
Modem Type Data (synchronous/asynchronous)/Fax
Maximum Data Rate 28.8Kbps
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, V.34
Rockwell V.FC
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 out | CN1 | DC power | CN4 |
|------------------+----------+-------------------+----------|
| Line in | CN2 | Power switch | SW1 |
|------------------+----------+-------------------+----------|
| RS-232/422 | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+-------+----------+-----------------------------------|
| AA | Red | On | Auto-answer enabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Off | Auto-answer disabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Blinking | Phone 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 is operating at 4800bps or |
| | | | faster |
|-----+-------+----------+-----------------------------------|
| HS | Red | Off | Modem is operating at slower than |
| | | | 4800bps |
|-----+-------+----------+-----------------------------------|
| 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
+------------------------------------------------------------+
| COMMAND SET |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %DUMBn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT %DUMB1<CR> |
|--------------+---------------------------------------------|
| Description: | Disables the AT command set. |
|--------------+---------------------------------------------|
| Note: | The AT command set is always active for the |
| | first 20 seconds after the modem is powered |
| | up. AT%DUMB0 can be entered during this |
| | time period to re-enable the command set. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » %DUMB0 | Command set enabled. |
|--------------+---------------------------------------------|
| %DUMB1 | Command set disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LAP-M PACKET SIZE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S136=n [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S136=2 %C1<CR> |
|--------------+---------------------------------------------|
| Description: | Sets the frame size for an LAP-M |
| | connection. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S136=0 | Select 128 byte frame size. |
|--------------+---------------------------------------------|
| » S136=1 | Select 256 byte frame size. |
|--------------+---------------------------------------------|
| S136=2 | Select 512 byte frame size. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REDIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] DL |
|--------------+---------------------------------------------|
| Example: | AT M1 DL<CR> |
|--------------+---------------------------------------------|
| Description: | Redials the last number dialed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Example: | AT I1 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Displays modem properties. |
|--------------+---------------------------------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.22 PROBE REJECT TIME |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S97=n [cmds] |
|--------------+---------------------------------------------|
| Example: | ATS97=15<CR> |
|--------------+---------------------------------------------|
| Default: | 30 |
|--------------+---------------------------------------------|
| Range: | 15-70 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sets the time for which the modem will |
| | reject the V.22/V.22bis probe signal when |
| | in V.32 mode. |
+------------------------------------------------------------+