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# PHILIPS CONSUMER ELECTRONICS, CO.
PCA21EM
Card Type Fax, Modem (synchronous/asynchronous)
Chip Set Unidentified
Maximum Data Rate 28.8Kbps
Maximum Fax Rate 14.4Kbps
Data Bus External
Fax Class Class I & II
Data Modulation Bell 103/212
Protocol
ITU-T V.21, V.22, V.22bis, V.23, V.32,
V.32bis, V.32terbo, V.34
Fax Modulation ITU-T V.17, V.21CH2, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Line in | CN1 | RS-232/422 | CN3 |
|-----------------------------+----------+------------+------|
| Line out | CN2 | DC power | CN4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+-------+--------+------------------------------------|
| MR | Red | On | Power is on |
|------+-------+--------+------------------------------------|
| MR | Red | Off | Power is off |
|------+-------+--------+------------------------------------|
| TR | Red | On | DTR signal is high |
|------+-------+--------+------------------------------------|
| TR | Red | Off | DTR signal is low |
|------+-------+--------+------------------------------------|
| SD | Red | On | Modem is transmitting data |
|------+-------+--------+------------------------------------|
| SD | Red | Off | Modem is not transmitting data |
|------+-------+--------+------------------------------------|
| RD | Red | On | Modem is receiving data |
|------+-------+--------+------------------------------------|
| RD | Red | Off | Modem is not receiving data |
|------+-------+--------+------------------------------------|
| OH | Red | On | Modem is off-hook |
|------+-------+--------+------------------------------------|
| OH | Red | Off | Modem is on-hook |
|------+-------+--------+------------------------------------|
| CD | Red | On | Carrier signal detected |
|------+-------+--------+------------------------------------|
| CD | Red | Off | Carrier signal not detected |
|------+-------+--------+------------------------------------|
| AA | Red | On | Auto-answer enabled |
|------+-------+--------+------------------------------------|
| AA | Red | Off | Auto-answer disabled |
|------+-------+--------+------------------------------------|
| EC | Red | On | Error correction activated |
|------+-------+--------+------------------------------------|
| EC | Red | Off | Error correction disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| AT, ‘+++’, ‘Comma’, A/ |
|------------------------------------------------------------|
| A, E, M, O, P, S, T, V, X, Y, Z |
|------------------------------------------------------------|
| &C, &D, &F, &G, &K, &P, &S, &T, &V, &W, &X, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \A, \B, \C, \G, \J, \N, \Q, \V, \X, %A, %C, %E |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S16, S18, S25, S26, S27, S91 |
|------------------------------------------------------------|
| 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 automatic detection and negotiation |
| | of line speed during the handshake process |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| N0 | Auto-mode disabled, handshake speed |
| | designated by AT%B command. |
|--------------+---------------------------------------------|
| í N1 | Auto-mode enabled, handshake speed |
| | designated by AT%B command and DTE speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RELIABLE FALLBACK CHARACTER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S29=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-127 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets the character used as the |
| | auto-reliable fallback character; S29=0 |
| | will disable this function. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT MAPPED REGISTERS |
|------------------------------------------------------------|
| Register | Default |
|------------------------------+-----------------------------|
| S14 | 137 |
|------------------------------+-----------------------------|
| S15 | 83 |
|------------------------------+-----------------------------|
| S17 | 75 |
|------------------------------+-----------------------------|
| S19 | 3 |
|------------------------------+-----------------------------|
| S20 | 0 |
|------------------------------+-----------------------------|
| S21 | 48 |
|------------------------------+-----------------------------|
| S22 | 246 |
|------------------------------+-----------------------------|
| S23 | 12 |
|------------------------------+-----------------------------|
| S24 | 72 |
|------------------------------+-----------------------------|
| S28 | 16 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Kn [cmds] |
|--------------+---------------------------------------------|
| Default: | 5 |
|--------------+---------------------------------------------|
| Range: | 0-5 |
|--------------+---------------------------------------------|
| Unit: | N/A |
|--------------+---------------------------------------------|
| Description: | Configures action of break signal |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BAUD RATE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Select which type of baud signals will be |
| | used |
|--------------+---------------------------------------------|
| Note: | For External models only. |
|------------------------------------------------------------|
| Command | Function |
|-----------------+------------------------------------------|
| í %N0 | IBM PC DTE baud rate enabled |
|-----------------+------------------------------------------|
| %N1 | NEC PC98 DTE baud rate set 1 enabled |
|-----------------+------------------------------------------|
| %N2 | NEC PC98 DTE baud rate set 2 enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND MODE FROM DUMB/POWER-ON LEASED-LINE MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT*** <ENTER> (within 8 seconds after |
| | hard-reset) |
|--------------+---------------------------------------------|
| Description: | Returns the modem to command mode from dumb |
| | mode or power-on leased-line operation, you |
| | must turn the modem off then on again |
| | first. |
|--------------+---------------------------------------------|
| Note: | To permanently turn off dumb mode or |
| | power-on leased-line mode, change the |
| | stored profile by issuing one of these |
| | strings: for dumb mode, AT%D0&W&W1. For |
| | power-on leased-line mode, AT&L0&W&W1 |
| | |
| | For External models only. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode |
|--------------+---------------------------------------------|
| Note: | AT&M1-3 is for external models only. |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| í &M0 | Asynchronous mode |
|--------------+---------------------------------------------|
| &M1 | Synchronous connect mode and asynchronous |
| | off-line command mode. |
|--------------+---------------------------------------------|
| &M2 | Synchronous connect mode and asynchronous |
| | off-line command mode and set DTR high. |
|--------------+---------------------------------------------|
| &M3 | Synchronous connect mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode options |
|--------------+---------------------------------------------|
| Note: | AT&Q1-3 is for external models only. |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| í &Q0 | Asynchronous mode, serial port speed |
| | follows connect speed. |
|--------------+---------------------------------------------|
| &Q1 | Asynchronous off-line command mode and |
| | synchronous connect mode. |
|--------------+---------------------------------------------|
| &Q2 | Asynchronous off-line command mode - modem |
| | autodials first number in directory, then |
| | synchronous connect mode. |
|--------------+---------------------------------------------|
| &Q3 | Asynchronous off-line command mode on low |
| | DTR, synchronous connect mode on high DTR. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 300 or 1200bps |
|--------------+---------------------------------------------|
| í B1 | Bell 212A at 300 or 1200bps |
|--------------+---------------------------------------------|
| B2 | V.23 at 1200bps while AT%B1200 is set. |
| | (Answer mode: TX1200/RX75bps. Originate |
| | mode: TX75/RX1200bps.) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Dials telephone number according to any |
| | modifiers included in the string |
|--------------+---------------------------------------------|
| Note: | Any combination of modifiers can be used to |
| | produce the desired dial functions in |
| | sequence. |
|--------------+---------------------------------------------|
| Modifier | Function |
|--------------+---------------------------------------------|
| P | Pulse dialing enabled |
|--------------+---------------------------------------------|
| R | Answer mode enabled, originate mode |
| | disabled following handshake initiation |
|--------------+---------------------------------------------|
| S=n | Dial stored telephone number n |
|--------------+---------------------------------------------|
| T | Tone dialing enabled |
|--------------+---------------------------------------------|
| W | Dialing resumed following dial tone |
| | detection |
|--------------+---------------------------------------------|
| , | Dialing paused for amount of time specified |
| | in S8 register |
|--------------+---------------------------------------------|
| @ | Wait for 5 seconds of silence |
|--------------+---------------------------------------------|
| ! | Modem commanded to go off-hook for |
| | specified time before returning on-hook |
|--------------+---------------------------------------------|
| ; | Modem returned to command state after |
| | dialing |
|--------------+---------------------------------------------|
| ^ | Calling tone enabled for this call |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DCE LINE SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] %Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum allowable data exchange |
| | rate after handshake process. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %B300 | 300bps |
|--------------+---------------------------------------------|
| %B1200 | 1200bps |
|--------------+---------------------------------------------|
| %B2400 | 2400bps |
|--------------+---------------------------------------------|
| %B4800 | 4800bps |
|--------------+---------------------------------------------|
| %B7200 | 7200bps |
|--------------+---------------------------------------------|
| %B9600 | 9600bps |
|--------------+---------------------------------------------|
| %B12000 | 12.0Kbps |
|--------------+---------------------------------------------|
| %B14400 | 14.4Kbps |
|--------------+---------------------------------------------|
| í %B28800 | 28.8Kbps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DUMB MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Dn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls which mode the modem will operate |
| | in |
|--------------+---------------------------------------------|
| Note: | For External models only. |
|------------------------------------------------------------|
| Command | Function |
|---------------------------+--------------------------------|
| í %D0 | Smart mode enabled |
|---------------------------+--------------------------------|
| %D1 | Dumb mode enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HOOK CONTROL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Hn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem is on-hook or |
| | off-hook |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| H0 | Modem commanded to go on-hook (hang-up) |
|--------------+---------------------------------------------|
| H1 | Modem commanded to go off-hook (make busy), |
| | disabled in Germany. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Tn [cmds] |
|--------------+---------------------------------------------|
| Default: | 0, Denmark 1, France 2 |
|--------------+---------------------------------------------|
| Range: | 0-90 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S30=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-90 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Maximum duration of DTE and DCE inactivity |
| | allowed prior to initiating hang-up |
| | process. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE SIGNAL QUALITY/ LINE SIGNAL LEVEL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Q [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns a value which indicates line signal |
| | quality (average EQM value) and received |
| | line signal level (in -dBm) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects line type |
|--------------+---------------------------------------------|
| Note: | AT&L2 is for external models only. |
|--------------+---------------------------------------------|
| Command | Line Type |
|--------------+---------------------------------------------|
| í &L0 | Switched line (PSTN/Dial-up) |
|--------------+---------------------------------------------|
| &L1 | Manual Leased-line mode, issue this command |
| | after the modems are connected: AT&L1D |
| | originating modem and AT&L1A answering |
| | modem. |
|--------------+---------------------------------------------|
| &L2 | Power-on (Auto) Leased-line mode, issue |
| | this command after the modems are connected |
| | and power is turned on: ATS0=0&L2 |
| | originating modem and ATS0=1&L2 answering |
| | modem. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MODULATION SELECTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects which modulation will be used for a |
| | connection |
|------------------------------------------------------------|
| Command | Function |
|-------------------+----------------------------------------|
| \M0 | Both V.34 and V.32terbo modulation |
| | enabled |
|-------------------+----------------------------------------|
| \M1 | V.34 modulation only enabled |
|-------------------+----------------------------------------|
| \M2 | V.32terbo modulation only enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum |
|--------------+---------------------------------------------|
| I3 | Reports model ID & firmware ID |
|--------------+---------------------------------------------|
| I5 | Reports country code |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | ‘RING’ result code disabled; ‘CONNECT’ and |
| | ‘NO CARRIER" result codes disabled in |
| | answer mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RTS/CTS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Rn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects RTS/CTS options |
|--------------+---------------------------------------------|
| Note: | For External models only. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &R0 | CTS follows RTS in synchronous mode |
|--------------+---------------------------------------------|
| &R1 | CTS forced high in synchronous mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SLEEP TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S13=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 6 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Maximum duration of DTE and DCE inactivity |
| | allowed prior to initiating low-power sleep |
| | 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 |
+------------------------------------------------------------+