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# PRACTICAL PERIPHERALS, INC.
PM144HC II (VER. 2)
Card Type Modem (asynchronous)
Chipset Unidentified
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
ITU-T V.21, V.22, V.22bis, V.32,
V.32bis
Fax Modulation V.17, V.27ter, V.29
Error MNP5, V.42bis
Correction/Compression
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------+-------+---------------------+-------|
| Line in/out | CN1 | Line in/out | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | JP1 |
|----------------------------+-------------------------------|
| 3F8h (COM1:) | Pins 1 & 2, 7 & 8 closed |
|----------------------------+-------------------------------|
| 2F8h (COM2:) | Pins 1 & 2, 8 & 9 closed |
|----------------------------+-------------------------------|
| 3E8h (COM3:) | Pins 2 & 3, 7 & 8 closed |
|----------------------------+-------------------------------|
| 2E8h (COM4:) | Pins 2 & 3, 8 & 9 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| Setting | JP1 |
|----------------------------+-------------------------------|
| IRQ2 | Pins 10 & 11 closed |
|----------------------------+-------------------------------|
| IRQ3 | Pins 11 & 12 closed |
|----------------------------+-------------------------------|
| IRQ4 | Pins 5 & 6 closed |
|----------------------------+-------------------------------|
| IRQ5 | Pins 4 & 5 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, D, E, H, L, M, N, Q, V, W, X, Y, Z |
|------------------------------------------------------------|
| &D, &F, &K, &V, &W, &Y, &Z |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S18, S25, S30, S36, S38, S46, S48, S82 |
|------------------------------------------------------------|
| S86, S95, S108, S109, S110 |
|------------------------------------------------------------|
| Note: See MHI documentation for complete information. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| UNIDENTIFIED COMMANDS |
|------------------------------------------------------------|
| Command | Default |
|------------------------------+-----------------------------|
| S37 | 0 |
|------------------------------+-----------------------------|
| S43 | 0 |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| AUTO-ANSWER MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &An [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the mode the modem will operate in on |
| | auto-answer. |
|------------------------------------------------------------|
| Command | Function |
|-----------------+------------------------------------------|
| í &A0 | Modem auto-answers in answer mode. |
|-----------------+------------------------------------------|
| &A1 | Modem auto-answers in originate mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RETRAIN |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will |
| | automatically perform a retrain sequence |
| | when line conditions change. |
|------------------------------------------------------------|
| Command | Function |
|-----------------------+------------------------------------|
| &B0 | Auto-retrain disabled. |
|-----------------------+------------------------------------|
| í &B1 | Auto-retrain enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD SIGNAL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the behaviour of the CD signal. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &C0 | CD forced high. |
|--------------+---------------------------------------------|
| &C1 | CD forced high after carrier signal is |
| | detected. |
|--------------+---------------------------------------------|
| &C2 | CD forced high except during disconnect. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the communications mode the modem |
| | will use. |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| &Q0 | Asynchronous direct mode. |
|--------------+---------------------------------------------|
| í &Q5 | Asynchronous V.42 reliable mode. |
|--------------+---------------------------------------------|
| &Q6 | Buffered asynchronous mode. |
|--------------+---------------------------------------------|
| &Q8 | Asynchronous MNP reliable mode. |
|--------------+---------------------------------------------|
| &Q9 | Asynchronous V.42bis only mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested about the |
| | modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Displays product identification code. |
|--------------+---------------------------------------------|
| I1 | Displays ROM checksum. |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum. |
|--------------+---------------------------------------------|
| I3 | Displays firmware revision. |
|--------------+---------------------------------------------|
| I4 | Displays feature bitmap. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RING |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S101=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Selects which extended ring types the modem |
| | will respond to. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | Do not respond to ring type A. |
| | | |
| | 1 | Respond to ring type A. |
|------+-------+---------------------------------------------|
| 1 | í 0 | Do not respond to ring type B. |
| | | |
| | 1 | Respond to ring type B. |
|------+-------+---------------------------------------------|
| 2 | í 0 | Do not respond to ring type C. |
| | | |
| | 1 | Respond to ring type C. |
|------+-------+---------------------------------------------|
| 3 | í 0 | Do not respond to ring type D. |
| | | |
| | 1 | Respond to ring type D. |
|------+-------+---------------------------------------------|
| 4 | í 0 | Do not respond to ring type E. |
| | | |
| | 1 | Respond to ring type E. |
|------+-------+---------------------------------------------|
| 5 | í 0 | Do not respond to ring type F. |
| | | |
| | 1 | Respond to ring type F. |
|------+-------+---------------------------------------------|
| 6 | í 0 | Do not respond to ring type G. |
| | | |
| | 1 | Respond to ring type G. |
|------+-------+---------------------------------------------|
| 7 | í 0 | Report RING for all ring types. |
| | | |
| | 1 | Report RING n where n is the ring type. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON-LINE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] On |
|--------------+---------------------------------------------|
| Description: | Instructs the modem to return to on-line |
| | state. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| O0 | Return to on-line state. |
|--------------+---------------------------------------------|
| O1 | Return to on-line state and initiate |
| | retrain sequence. |
|--------------+---------------------------------------------|
| O3 | Return to on-line state and initiate |
| | renegotiation sequence. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the communication protocol for |
| | low-speed data calls. |
|--------------+---------------------------------------------|
| Command | Protocol |
|--------------+---------------------------------------------|
| B0 | Modem will use ITU-T V.22 at 1200bps. |
|--------------+---------------------------------------------|
| í B1 | Modem will use Bell 212A at 1200bps. |
|--------------+---------------------------------------------|
| B2 | Modem will use ITU-T V.23 at receive |
| | 1200/transmit 75bps. |
|--------------+---------------------------------------------|
| B3 | Modem will use ITU-T V.23 at receive |
| | 75/transmit 1200bps. |
|--------------+---------------------------------------------|
| B15 | Modem will use ITU-T V.21 at 300bps. |
|--------------+---------------------------------------------|
| í B16 | Modem will use Bell 103A at 300bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRELLIS CODING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Un [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will use trellis |
| | coding. |
|------------------------------------------------------------|
| Command | Function |
|-----------------------+------------------------------------|
| í &U0 | Trellis coding enabled. |
|-----------------------+------------------------------------|
| &U1 | Trellis coding disabled. |
+------------------------------------------------------------+