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# MAXTECH CORPORATION
PCM 336C
Card Type Modem/Fax card
Chip Set Unidentified
Maximum Modem Rate 33.6Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Bell 103/212A
Protocol
ITU-T V.22bis, V.22, V.23, V.32,
V.32bis, V.34, V34+, V.21
Fax Modulation ITU-T V.27ter, V.29
Protocol
Error MNP5, V.42bis, V.42
Correction/Compression
Fax Class Class I
Data Bus PCMCIA
54707
+------------------------------------------------------------+
| SUPPORTED COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| AT, +++, A/ |
|------------------------------------------------------------|
| A, E, H, M, O, P, Q, T, V, X, Y, Z |
|------------------------------------------------------------|
| &C, &F, &G, &W, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \A, \B, \C, \G, \J, \K, \O, \U, \X, \Y, \Z |
|------------------------------------------------------------|
| %A |
|------------------------------------------------------------|
| "H |
|------------------------------------------------------------|
| -J |
|------------------------------------------------------------|
| Special Commands |
|------------------------------------------------------------|
| +MS |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S14, S16, S18, S21, S22, S23, S25 |
|------------------------------------------------------------|
| S27, S30, S31, S33, S37 |
|------------------------------------------------------------|
| 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 | Auto-mode detection enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUXILIARY RELAY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Jn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls auxiliary relay operations |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &J0 | Auxiliary relay disabled |
|--------------+---------------------------------------------|
| &J1 | Auxiliary relay enabled when modem is off |
| | hook |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATION PROTOCOLS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the communication protocol for data |
| | calls |
|--------------+---------------------------------------------|
| Command | Protocol |
|--------------+---------------------------------------------|
| B0 | CCITT mode |
|--------------+---------------------------------------------|
| í B1 | Bell mode |
|--------------+---------------------------------------------|
| B2 | ITU-T V.23 originate mode; 1200bps receive, |
| | 75bps transmit |
|--------------+---------------------------------------------|
| B3 | ITU-T V.23 originate mode; 75bps receive, |
| | 1200bps transmit |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| &M0 | Asynchronous mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode options |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| &Q0 | Asynchronous mode, serial port speed |
| | follows connect speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONFIGURATION PROFILES |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &V [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays active and stored configuration |
| | profiles |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í&V0 | Displays active and stored profile 0 |
|--------------+---------------------------------------------|
| &V1 | Displays active and stored profile 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA SET READY (DSR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Sn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects DSR options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &S0 | DSR forced high |
|--------------+---------------------------------------------|
| &S1 | DSR high only while modem is handshaking or |
| | connected |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA TERMINAL READY (DTR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Dn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects modem response to DTR |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &D0 | DTR override |
|--------------+---------------------------------------------|
| &D1 | DTR toggle causes online command mode |
|--------------+---------------------------------------------|
| í &D2 | Normal DTR operations |
|--------------+---------------------------------------------|
| &D3 | Resets on receipt of DTR |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| DP | Pulse dialing enabled |
|--------------+---------------------------------------------|
| DR | Answer mode enabled; originate mode |
| | disabled following handshake initiation. |
|--------------+---------------------------------------------|
| DS=n | Dial stored telephone number n |
|--------------+---------------------------------------------|
| DT | Tone dialing enabled/Pulse dialing disabled |
|--------------+---------------------------------------------|
| DW | Dialing resumed following dial tone |
| | detection |
|--------------+---------------------------------------------|
| D, | Dialing paused for amount of time specified |
| | in S8 register |
|--------------+---------------------------------------------|
| D! | Flash function initiated. Modem commanded |
| | to go off-hook for specified time before |
| | returning on-hook. |
|--------------+---------------------------------------------|
| D@ | Wait for Quite Answer function enabled. |
| | Modem waits until a "quiet answer," a |
| | ring-back signal followed by silence up to |
| | the time specified in S7, is received prior |
| | to executing the rest of the dial string. |
|--------------+---------------------------------------------|
| D; | Modem returned to idle state after dialing. |
| | The semicolon can only be placed at the end |
| | of the dial command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Wn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables selection of additional result |
| | codes |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í W0 | Modem reports DTE response codes |
|--------------+---------------------------------------------|
| W1 | Modem reports DTE response codes |
|--------------+---------------------------------------------|
| W2 | Modem reports DCE response codes |
|--------------+---------------------------------------------|
| W3 | Modem reports DTE speed, modulation mode, |
| | error control, data compression, and DCE |
| | speed |
|--------------+---------------------------------------------|
| W4 | Modem reports DTE protocol, data |
| | compression, and DTE speed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables flow control options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &K0 | Flow control disabled |
|--------------+---------------------------------------------|
| í &K3 | RTS/CTS flow control enabled |
|--------------+---------------------------------------------|
| &K4 | XON/XOFF flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PULSE DIALING RATIO |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Pn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects pulse dial make/break ratio |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &P0 | 39/61ms at 10pps (North America) |
|--------------+---------------------------------------------|
| &P1 | 33/67ms at 10pps (Europe) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports four digit product code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Reports internal memory test |
|--------------+---------------------------------------------|
| I3 | Reports device ID |
|--------------+---------------------------------------------|
| I4 | Reports internal ID |
|--------------+---------------------------------------------|
| I5 | Reports modem chip hardware configuration |
|--------------+---------------------------------------------|
| I6 | Reports country code |
|--------------+---------------------------------------------|
| I7 | Reports board manufacturer firmware version |
|--------------+---------------------------------------------|
| I8 | Reports modem firmware version |
|--------------+---------------------------------------------|
| I10 | Reports modem board configuration |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Tn |
|--------------+---------------------------------------------|
| Description: | Selects test options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &T0 | End current test |
|--------------+---------------------------------------------|
| &T1 | Begin local analog loopback test |
|--------------+---------------------------------------------|
| &T4 | Grant remote digital loopback request |
|--------------+---------------------------------------------|
| &T5 | Deny remote digital loopback request |
|--------------+---------------------------------------------|
| &T6 | Request remote digital loopback |
|--------------+---------------------------------------------|
| &T7 | Request remote digital loopback and |
| | self-test |
|--------------+---------------------------------------------|
| &T8 | Begin local analog loopback and self-test |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRELLIS CODING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Un [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables/disables trellis coding |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í&U0 | V.32 trellis coding enabled |
|--------------+---------------------------------------------|
| &U1 | V.32 trellis coding disabled |
+------------------------------------------------------------+
EXTENDED AT COMMAND SET
+------------------------------------------------------------+
| AUTO-FALLBACK/FALL-FORWARD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects auto-fallback/fall-forward |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %G0 | Auto-fallback/fall-forward enabled |
|--------------+---------------------------------------------|
| %G1 | Auto-fallback/fall-forward disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RETRAIN |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %En [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls auto-retrain mode and |
| | fallback/fall-forward |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %E0 | Auto-retrain disabled |
|--------------+---------------------------------------------|
| %E1 | Auto-retrain enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLING TONE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] -Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls whether the DTE will allow the |
| | modem to send a 1300Hz calling tone when |
| | originating |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| -C0 | Calling tone disabled |
|--------------+---------------------------------------------|
| -C1 | 1300hz calling tone enabled |
|--------------+---------------------------------------------|
| -C2 | V.8 and 1300hz calling tone enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | Data compression disabled |
|--------------+---------------------------------------------|
| %C1 | MNP5 enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the type of connection the modem |
| | will operate in |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \N0 | Normal mode enabled |
|--------------+---------------------------------------------|
| \N1 | Normal mode enabled |
|--------------+---------------------------------------------|
| \N2 | Reliable mode enabled |
|--------------+---------------------------------------------|
| í \N3 | Auto-reliable mode enabled |
|--------------+---------------------------------------------|
| \N4 | V.42 reliable mode enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by modem |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \Q0 | Flow control disabled |
|--------------+---------------------------------------------|
| \Q1 | Bi-directional XON/XOFF flow control |
| | enabled |
|--------------+---------------------------------------------|
| \Q2 | CTS flow control by DCE enabled |
|--------------+---------------------------------------------|
| í \Q3 | Bi-directional RTS/CTS flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Tn [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-90 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis - MAXIMUM STRING LENGTH |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "On [cmds] |
|--------------+---------------------------------------------|
| Range: | 6-250 |
|--------------+---------------------------------------------|
| Unit: | Characters |
|--------------+---------------------------------------------|
| Description: | Selects string size for V.42bis compression |