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# PRACTICAL PERIPHERALS, INC.
PC144HC
Modem Type Data (synchronous/asynchronous)/Fax
Maximum Data Rate 14.4Kbps
Maximum Fax Rate 14.4Kbps
Data Bus 8-bit ISA
Fax Class Class I & II
Data Modulation Bell 103A/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.23, 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 out | CN1 | Line in | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Address | SW1/1 | SW1/2 |
|--------------------+-------------------+-------------------|
| COM1: (3F8h) | On | On |
|--------------------+-------------------+-------------------|
| COM2: (2F8h) | On | Off |
|--------------------+-------------------+-------------------|
| COM3: (3E8h) | Off | On |
|--------------------+-------------------+-------------------|
| COM4: (2E8h) | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | JP1 pins 1 & 2 | JP1 pins 3 & 4 | JP1 pins 5 & 6 |
|---------+----------------+----------------+----------------|
| » 3/4 | Closed | Open | Open |
|---------+----------------+----------------+----------------|
| 2 | Open | Closed | Open |
|---------+----------------+----------------+----------------|
| 5 | Open | Open | Closed |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| EXTENDED RING |
|------------------------------------------------------------|
| Format: | AT [cmds] S101=n [cmds] |
|-----------------+------------------------------------------|
| Example: | ATS101=40<CR> |
|-----------------+------------------------------------------|
| Default: | 0 |
|-----------------+------------------------------------------|
| Range: | 0 - 255 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped |
|-----------------+------------------------------------------|
| Description: | Selects the response to extended ring |
| | types. |
|------------------------------------------------------------|
| Bit | Value | Function |
|-----------+---------+--------------------------------------|
| 0 | » 0 1 | Do not respond to ring type A. |
| | | |
| | | Respond to ring type A. |
|-----------+---------+--------------------------------------|
| 1 | » 0 1 | Do not respond to ring type B. |
| | | |
| | | Respond to ring type B. |
|-----------+---------+--------------------------------------|
| 2 | » 0 1 | Do not respond to ring type C. |
| | | |
| | | Respond to ring type C. |
|-----------+---------+--------------------------------------|
| 3 | » 0 1 | Do not respond to ring type D. |
| | | |
| | | Respond to ring type D. |
|-----------+---------+--------------------------------------|
| 4 | » 0 1 | Do not respond to ring type E. |
| | | |
| | | Respond to ring type E. |
|-----------+---------+--------------------------------------|
| 5 | » 0 1 | Do not respond to ring type F. |
| | | |
| | | Respond to ring type F. |
|-----------+---------+--------------------------------------|
| 6 | » 0 1 | Do not respond to ring type G. |
| | | |
| | | Respond to ring type G. |
|-----------+---------+--------------------------------------|
| 7 | » 0 1 | Report RING for all ring types. |
| | | |
| | | Report RING n where n is the ring |
| | | type. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP SCREENS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $H |
|--------------+---------------------------------------------|
| Example: | AT $H<CR> |
|--------------+---------------------------------------------|
| Description: | Shows modem help screens. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+