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# PRACTICAL PERIPHERALS, INC.
PM14400FXMT
Card Type Modem (asynchronous)
Chip Set Unidentified
Maximum Modem Rate 14.4Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Bell 103/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.32,
V.32bis
Fax Modulation ITU-T V.17, V.21CH2, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
Fax Class Class I & II
Data Bus External
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+--------------+----------+----------------------------|
| AA | Unidentified | On | Auto-answer enabled |
|-----+--------------+----------+----------------------------|
| AA | Unidentified | Off | Auto-answer disabled |
|-----+--------------+----------+----------------------------|
| AA | Unidentified | Blinking | Phone is ringing |
|-----+--------------+----------+----------------------------|
| RX | Unidentified | On | Modem is receiving data |
|-----+--------------+----------+----------------------------|
| RX | Unidentified | Off | Modem is not receiving |
| | | | data |
|-----+--------------+----------+----------------------------|
| TX | Unidentified | On | Modem is transmitting data |
|-----+--------------+----------+----------------------------|
| TX | Unidentified | Off | Modem is not transmitting |
| | | | data |
|-----+--------------+----------+----------------------------|
| CD | Unidentified | On | Carrier signal detected |
|-----+--------------+----------+----------------------------|
| CD | Unidentified | Off | Carrier signal not |
| | | | detected |
|-----+--------------+----------+----------------------------|
| OH | Unidentified | On | Modem is off-hook |
|-----+--------------+----------+----------------------------|
| OH | Unidentified | Off | Modem is on-hook |
|-----+--------------+----------+----------------------------|
| RS | Unidentified | On | Modem is ready to send |
| | | | data |
|-----+--------------+----------+----------------------------|
| RS | Unidentified | Off | Modem is not ready to send |
| | | | data |
|-----+--------------+----------+----------------------------|
| TR | Unidentified | On | DTR signal is high |
|-----+--------------+----------+----------------------------|
| TR | Unidentified | Off | DTR signal is low |
|-----+--------------+----------+----------------------------|
| EC | Unidentified | On | Error correction enabled |
|-----+--------------+----------+----------------------------|
| EC | Unidentified | Off | Error correction disabled |
|-----+--------------+----------+----------------------------|
| CS | Unidentified | On | Modem is clear to send |
| | | | data |
|-----+--------------+----------+----------------------------|
| CS | Unidentified | Off | Modem is not clear to send |
| | | | data |
|-----+--------------+----------+----------------------------|
| MR | Unidentified | On | Power is on |
|-----+--------------+----------+----------------------------|
| MR | Unidentified | Off | Power is off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| AT, ‘+++’, A/ |
|------------------------------------------------------------|
| A, D, E, H, M, V, W, X, Y, Z |
|------------------------------------------------------------|
| &A, &B, &F, &L, &R, &S, &T, &V, &W, &Y, &Z |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S18, S25, S26, S30, S36, S37, S38, S46, |
|------------------------------------------------------------|
| S48, S82, S86, S95, S108, S109, S110 |
|------------------------------------------------------------|
| Note: See MHI Help File for full command documentation. |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| AUTO-MODE DETECTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects various options for the automatic |
| | detection and negotiation of protocols |
| | during the handshake process if the modem |
| | is communicating with a remote modem of |
| | dissimilar speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| N0 | Auto-mode detection disabled |
|--------------+---------------------------------------------|
| í N1 | In originate mode, handshake begins at line |
| | speed designated by the S37 register. Modem |
| | can shift to a slower speed if necessary. |
| | |
| | In answer mode, handshake attempted with |
| | the following protocols in order - V.FC, |
| | V.32bis, V.32, V.22bis, V.22 or Bell 212, |
| | V.21, and Bell 103 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SOURCE - SYNCHRONOUS TRANSMIT |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Xn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects DTE transmit clock source |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &X2 | Modem generates clock from the receive |
| | carrier signal |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATION PROTOCOLS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the communication protocol for data |
| | calls |
|------------------------------------------------------------|
| Note: The B command allows the simultaneous selection |
| of more than one suffix, enabling multiple protocols. |
|------------------------------------------------------------|
| Command | Protocol |
|--------------+---------------------------------------------|
| B0 | ITU-T V.22 at 1200bps |
|--------------+---------------------------------------------|
| B1 | Bell 212A at 300 or 1200bps |
|--------------+---------------------------------------------|
| B2 | ITU-T V.23 at 75/1200bps |
|--------------+---------------------------------------------|
| B3 | ITU-T V.23 at 1200/75bps |
|--------------+---------------------------------------------|
| B15 | ITU-T V.21 at 300bps |
|--------------+---------------------------------------------|
| B16 | Bell 103 at 300bps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| í &M0 | Asynchronous mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode options |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| í &Q0 | Asynchronous mode, serial port speed |
| | follows connect speed. |
|--------------+---------------------------------------------|
| &Q1 | Synchronous mode 1 |
|--------------+---------------------------------------------|
| &Q2 | Synchronous mode 2 |
|--------------+---------------------------------------------|
| &Q3 | Synchronous mode 3 |
|--------------+---------------------------------------------|
| &Q3 | Hayes AutoSync mode |
|--------------+---------------------------------------------|
| &Q5 | Error correction mode |
|--------------+---------------------------------------------|
| &Q6 | Buffered asynchronous mode |
|--------------+---------------------------------------------|
| &Q8 | MNP operational mode |
|--------------+---------------------------------------------|
| &Q9 | Conditional data compression |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA CARRIER DETECT (DCD) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the DCD option is enabled |
| | or disabled |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &C0 | DCD enabled |
|--------------+---------------------------------------------|
| &C1 | DCD enabled after carrier signal detected |
|--------------+---------------------------------------------|
| &C2 | DCD signal on except during disconnect |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA TERMINAL READY (DTR) |
|------------------------------------------------------------|
| Type: | Configuration |
|---------------+--------------------------------------------|
| Format: | AT [cmds] &Dn [cmds] |
|---------------+--------------------------------------------|
| Description: | Selects modem response to DTR |
|------------------------------------------------------------|
| Note: The action each variant of &D causes depends on |
| the setting of &Q |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í &D0 | Modem does not respond to DTR |
|---------------+--------------------------------------------|
| &D1 | Modem goes to command mode after DTR goes |
| | is off |
|---------------+--------------------------------------------|
| &D2 | Modem goes to command mode and disconnects |
| | (hangs up) after DTR goes off; Auto-Answer |
| | is disabled. |
|---------------+--------------------------------------------|
| &D3 | Modem is initialized after DTR goes off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables flow control options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &K0 | Flow control disabled |
|--------------+---------------------------------------------|
| &K1 | RTS to CTS flow control enabled |
|--------------+---------------------------------------------|
| &K2 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| í &K3 | RTS/CTS flow control enabled |
|--------------+---------------------------------------------|
| &K4 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| &K5 | Transparent XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| &K6 | RTS/CTS flow control with pass through |
| | enabled |
|--------------+---------------------------------------------|
| &K7 | RTS/CTS flow control with XON/XOFF DCE to |
| | DCE enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| GUARD TONE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Commands the modem to transmit a guard tone |
| | in V.22/V.22bis |
|------------------------------------------------------------|
| Note: Used primarily for international data |
| transmission |
|------------------------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &G0 | Guard tone disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $H |
|--------------+---------------------------------------------|
| Description: | Accesses summary of the modem’s commands |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON-LINE |
|------------------------------------------------------------|
| Type: | Immediate |
|---------------+--------------------------------------------|
| Format: | AT [cmds] On [cmds] |
|---------------+--------------------------------------------|
| Description: | Controls on-line command (data |
| | transmission) state options. |
|------------------------------------------------------------|
| Note: The O command must be placed at the end of the |
| command string. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| O0 | On-line command mode with no retraining |
| | enabled |
|---------------+--------------------------------------------|
| O1 | On-line command mode with retraining |
| | enabled |
|---------------+--------------------------------------------|
| O2 | On-line command mode and initiate rate |
| | negotiation |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports modem model and speed |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Perform ROM checksum, returns OK or ERROR |
|--------------+---------------------------------------------|
| I3 | Reports firmware revision number |
|--------------+---------------------------------------------|
| I4 | Reports modem feature availability |
|--------------+---------------------------------------------|
| I6 | Reports link statistics |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables modem to send result codes to the |
| | DTE |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í Q0 | Result code sending enabled |
|--------------+---------------------------------------------|
| Q1 | Result code sending disabled |
|--------------+---------------------------------------------|
| Q2 | Modem returns result codes when originating |
| | a call, but does not return result codes |
| | from the answer mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEAKER VOLUME |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls speaker volume |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| L0 | Low volume setting |
|--------------+---------------------------------------------|
| L1 | Low volume setting |
|--------------+---------------------------------------------|
| í L2 | Medium volume setting |
|--------------+---------------------------------------------|
| L3 | Highest volume setting |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRELLIS CODE MODULATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &U [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls trellis encoding |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &U0 | Enables trellis encoding |
|--------------+---------------------------------------------|
| &U1 | Disables trellis encoding |
+------------------------------------------------------------+
S(status) -REGISTERS
+------------------------------------------------------------+
| BUFFER LOWER LIMIT |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S49=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 1-249 |
|--------------+---------------------------------------------|
| Default: | 64 |
|--------------+---------------------------------------------|
| Unit: | bytes |
|--------------+---------------------------------------------|
| Description: | Sets the lower limit of the buffer |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUFFER UPPER LIMIT |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S50=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 2-250 |
|--------------+---------------------------------------------|
| Default: | bytes |
|--------------+---------------------------------------------|
| Unit: | 220 |
|--------------+---------------------------------------------|
| Description: | Sets the upper limit of the buffer |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DCE SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S43? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the DCE speed of the current |
| | connection |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PACKET SIZE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S136=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-2 |
|--------------+---------------------------------------------|
| Unit: | frame size |
|--------------+---------------------------------------------|
| Description: | Designates the LAP-M packet size |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PRIVATE CIRCUIT CARRIER LEVEL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S63=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-15 |
|--------------+---------------------------------------------|
| Units: | -dBm |
|--------------+---------------------------------------------|
| Description: | Controls the carrier power level in dBm for |
| | leased line operation. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROBE TIMING |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S97=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 15-70 |
|--------------+---------------------------------------------|
| Unit: | 0.1 sec |
|--------------+---------------------------------------------|
| Description: | Sets the duration of the signal used by the |
| | modem in answer mode during a V.32 automode |
| | handshake to determine if the calling modem |
| | is a V.22 or V.22bis type modem |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RING SETTINGS |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S101=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | bit map |
|--------------+---------------------------------------------|
| Description: | Sets the distinctive ring setting |
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