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# XIRCOM, INC.
CM-33
Card Type Modem (asynchronous)
Chipset Unidentified
Maximum Onboard Memory 64KB SRAM/256KB Flash RAM
Maximum Data Rate 33.6Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Bell 212A
ITU-T V.22, V.22bis, V.23, V.32,
V.32bis, V.34
AT&T V.32terbo
Fax Modulation ITU-T V.17, V.27ter, V.29
Error MNP5, V.42, V.42bis
Correction/Compression
Fax Class Class I & II
Data Bus PCMCIA Type II
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-----------------------+-------+--------------------+-------|
| MAM connector to | CN1 | Telephone line out | CN2 |
| PCMCIA card | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+--------------+--------+-----------------------------|
| LED1 | Unidentified | On | Modem is receiving or |
| | | | transmitting data |
|------+--------------+--------+-----------------------------|
| LED1 | Unidentified | Off | Modem is not receiving or |
| | | | transmitting data |
|------+--------------+--------+-----------------------------|
| LED2 | Unidentified | On | Carrier signal detected |
|------+--------------+--------+-----------------------------|
| LED2 | Unidentified | Off | Carrier signal not detected |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, A/ |
|------------------------------------------------------------|
| A, D, E, H, M, N, P, Q, T, V, W, X, Y, Z |
|------------------------------------------------------------|
| &C, &D, &F, &G, &K, &P, &S, &V, &W, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \A, \B, \C, \G, \K, \N, \O, \Q, \T, \U, \V, \X, \Y, \Z |
|------------------------------------------------------------|
| %A, %C, %E, %G |
|------------------------------------------------------------|
| Special AT Commands |
|------------------------------------------------------------|
| -C, "H, -J, "O |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S25, |
| S30, S46, S82, S95, S108 |
|------------------------------------------------------------|
| Note: See MHI help file for complete information. |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode options. |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| í &Q5 | V.42 error correction mode. |
|--------------+---------------------------------------------|
| &Q6 | Buffered asynchronous mode. |
|--------------+---------------------------------------------|
| &Q8 | MNP error correction mode. |
|--------------+---------------------------------------------|
| &Q9 | V.42bis data compression or MNP4 error |
| | correction mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECTION FAILURE CODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S86? [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns a value which indicate the cause of |
| | a connection failure. |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | Normal hang up. |
|--------------+---------------------------------------------|
| 1 | No failure - normal hang-up after fax |
| | connection. |
|--------------+---------------------------------------------|
| 4 | Carrier signal lost. |
|--------------+---------------------------------------------|
| 5 | No error-control detected for remote modem |
| | during feature negotiation. |
|--------------+---------------------------------------------|
| 6 | Remote modem failed to respond to feature |
| | negotiation. |
|--------------+---------------------------------------------|
| 8 | No common framing technique found. |
|--------------+---------------------------------------------|
| 9 | No common protocol found. |
|--------------+---------------------------------------------|
| 10 | Remote modem sent erroneous feature |
| | negotiation message. |
|--------------+---------------------------------------------|
| 12 | No failure - remote modem disconnected |
| | normally. |
|--------------+---------------------------------------------|
| 13 | Remote modem failed to respond after the |
| | allowed number of re-transmissions of the |
| | same message. |
|--------------+---------------------------------------------|
| 14 | Violation of negotiated protocol caused |
| | failure. |
|--------------+---------------------------------------------|
| 15 | Negotiated compression failed. |
|--------------+---------------------------------------------|
| 18 | Time limit reached according to parameters |
| | set in S30. |
|--------------+---------------------------------------------|
| 19 | Remote modem failed to respond after the |
| | allowed number of re-transmissions of the |
| | same message. |
|--------------+---------------------------------------------|
| 32 | Disconnect tone received from telephone |
| | network. |
|--------------+---------------------------------------------|
| 33 | User aborted connection. |
|--------------+---------------------------------------------|
| 34 | DTR signal was lost. |
|--------------+---------------------------------------------|
| 99 | Reason for disconnection not known. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COUNTRY CODE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S133=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the country the modem is configured |
| | for. |
|--------------+---------------------------------------------|
| Note: | See the %TE command for more information. |
| | Not all options may be supported by all |
| | modems. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S133=0 | Country code set for the United States. |
|--------------+---------------------------------------------|
| S133=1 | Country code set for Great Britain. |
|--------------+---------------------------------------------|
| S133=2 | Country code set for Germany. |
|--------------+---------------------------------------------|
| S133=3 | Country code set for France. |
|--------------+---------------------------------------------|
| S133=4 | Country code set for Belgium. |
|--------------+---------------------------------------------|
| S133=5 | Country code set for the Netherlands. |
|--------------+---------------------------------------------|
| S133=6 | Country code set for Italy. |
|--------------+---------------------------------------------|
| S133=7 | Country code set for Spain. |
|--------------+---------------------------------------------|
| S133=8 | Country code set for Austria. |
|--------------+---------------------------------------------|
| S133=9 | Country code set for Switzerland. |
|--------------+---------------------------------------------|
| S133=10 | Country code set for Portugal. |
|--------------+---------------------------------------------|
| S133=11 | Country code set for Sweden. |
|--------------+---------------------------------------------|
| S133=12 | Country code set for Norway. |
|--------------+---------------------------------------------|
| S133=13 | Country code set for Denmark. |
|--------------+---------------------------------------------|
| S133=14 | Country code set for Finland. |
|--------------+---------------------------------------------|
| S133=15 | Country code set for Cyprus. |
|--------------+---------------------------------------------|
| S133=16 | Country code set for Czechoslovakia. |
|--------------+---------------------------------------------|
| S133=17 | Country code set for Greece. |
|--------------+---------------------------------------------|
| S133=18 | Country code set for Hungary. |
|--------------+---------------------------------------------|
| S133=19 | Country code set for Poland. |
|--------------+---------------------------------------------|
| S133=20 | Country code set for Russia. |
|--------------+---------------------------------------------|
| S133=21 | Country code set for Turkey. |
|--------------+---------------------------------------------|
| S133=22 | Country code set for Luxembourg. |
|--------------+---------------------------------------------|
| S133=23 | Country code set for Iceland. |
|--------------+---------------------------------------------|
| S133=25 | Country code set for Egypt. |
|--------------+---------------------------------------------|
| S133=26 | Country code set for India. |
|--------------+---------------------------------------------|
| S133=27 | Country code set for Kenya. |
|--------------+---------------------------------------------|
| S133=28 | Country code set for South Africa. |
|--------------+---------------------------------------------|
| S133=29 | Country code set for Morocco. |
|--------------+---------------------------------------------|
| S133=48 | Country code set for Abu Dhabi. |
|--------------+---------------------------------------------|
| S133=49 | Country code set for Australia. |
|--------------+---------------------------------------------|
| S133=50 | Country code set for Bangladesh. |
|--------------+---------------------------------------------|
| S133=51 | Country code set for China. |
|--------------+---------------------------------------------|
| S133=52 | Country code set for Hong Kong. |
|--------------+---------------------------------------------|
| S133=53 | Country code set for Indonesia. |
|--------------+---------------------------------------------|
| S133=54 | Country code set for Japan. |
|--------------+---------------------------------------------|
| S133=55 | Country code set for Korea. |
|--------------+---------------------------------------------|
| S133=56 | Country code set for Malaysia. |
|--------------+---------------------------------------------|
| S133=57 | Country code set for New Zealand. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COUNTRY CODE (CON'T) |
|------------------------------------------------------------|
| Command | Function |
|------------+-----------------------------------------------|
| S133=58 | Country code set for the Philippines. |
|------------+-----------------------------------------------|
| S133=59 | Country code set for Singapore. |
|------------+-----------------------------------------------|
| S133=96 | Country code set for Argentina. |
|------------+-----------------------------------------------|
| S133=97 | Country code set for Bolivia. |
|------------+-----------------------------------------------|
| S133=98 | Country code set for Brazil. |
|------------+-----------------------------------------------|
| S133=99 | Country code set for Chile. |
|------------+-----------------------------------------------|
| S133=100 | Country code set for Colombia. |
|------------+-----------------------------------------------|
| S133=101 | Country code set for Costa Rica. |
|------------+-----------------------------------------------|
| S133=102 | Country code set for Guatemala. |
|------------+-----------------------------------------------|
| S133=103 | Country code set for Mexico. |
|------------+-----------------------------------------------|
| S133=104 | Country code set for Nicaragua. |
|------------+-----------------------------------------------|
| S133=105 | Country code set for Paraguay. |
|------------+-----------------------------------------------|
| S133=106 | Country code set for Peru. |
|------------+-----------------------------------------------|
| S133=107 | Country code set for Uruguay. |
|------------+-----------------------------------------------|
| S133=108 | Country code set for Venezuela. |
|------------+-----------------------------------------------|
| S133=128 | Country code set for Kuwait. |
|------------+-----------------------------------------------|
| S133=129 | Country code set for Oman. |
|------------+-----------------------------------------------|
| S133=130 | Country code set for Saudi Arabia. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CREDIT CARD TONE TYPE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S121=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the type of credit card tone the |
| | modem will detect. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S121=0 | Modem will detect AT&T credit card tone. |
|--------------+---------------------------------------------|
| S121=1 | Modem will detect MCI credit card tone. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL DISPLAY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will display each |
| | digit as it is being dialed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &E0 | Dial display disabled. |
|--------------+---------------------------------------------|
| &E1 | Dial display enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested about the |
| | modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product identification code. |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum. |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum. |
|--------------+---------------------------------------------|
| I3 | Reports firmware revision. |
|--------------+---------------------------------------------|
| I4 | Displays feature bitmap. |
|--------------+---------------------------------------------|
| I6 | Displays connection statistics. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTE CONNECT SPEED RESULT CODE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S122=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the DTE speed that the modem will |
| | report in CONNECT messages. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S122=0 | Modem reports CONNECT. |
|--------------+---------------------------------------------|
| S122=1 | Modem reports CONNECT 1200. |
|--------------+---------------------------------------------|
| S122=2 | Modem reports CONNECT 2400. |
|--------------+---------------------------------------------|
| S122=3 | Modem reports CONNECT 4800. |
|--------------+---------------------------------------------|
| S122=4 | Modem reports CONNECT 7200. |
|--------------+---------------------------------------------|
| S122=5 | Modem reports CONNECT 9600. |
|--------------+---------------------------------------------|
| S122=6 | Modem reports CONNECT 12000. |
|--------------+---------------------------------------------|
| S122=7 | Modem reports CONNECT 14400. |
|--------------+---------------------------------------------|
| S122=8 | Modem reports CONNECT 16800. |
|--------------+---------------------------------------------|
| S122=9 | Modem reports CONNECT 19200. |
|--------------+---------------------------------------------|
| S122=10 | Modem reports CONNECT 21600. |
|--------------+---------------------------------------------|
| S122=11 | Modem reports CONNECT 24000. |
|--------------+---------------------------------------------|
| S122=12 | Modem reports CONNECT 26400. |
|--------------+---------------------------------------------|
| S122=13 | Modem reports CONNECT 28800. |
|--------------+---------------------------------------------|
| S122=14 | Modem reports CONNECT 38400. |
|--------------+---------------------------------------------|
| S122=15 | Modem reports CONNECT 57600. |
|--------------+---------------------------------------------|
| S122=16 | Modem reports CONNECT 115200. |
|--------------+---------------------------------------------|
| S122=17 | Modem reports CONNECT 230400. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $ |
|--------------+---------------------------------------------|
| Description: | Displays help screens on the modem's |
| | commands. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP SCREEN BORDER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S120=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether help screens will be |
| | displayed with an IBM Extended ASCII border |
| | around them. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S120=0 | Help screens are displayed with border. |
|--------------+---------------------------------------------|
| í S120=1 | Help screens are displayed without border. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE SPEED - CURRENT |
|------------------------------------------------------------|
| Type: | Register (read-only) |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S43? [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns a value indicating the speed of the |
| | current connection. |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 1 | Speed of current connection is 1200/75bps. |
|--------------+---------------------------------------------|
| 2 | Speed of current connection is 75/1200bps. |
|--------------+---------------------------------------------|
| 5 | Speed of current connection is 1200bps. |
|--------------+---------------------------------------------|
| 6 | Speed of current connection is 2400bps. |
|--------------+---------------------------------------------|
| 7 | Speed of current connection is 4800bps. |
|--------------+---------------------------------------------|
| 8 | Speed of current connection is 7200bps. |
|--------------+---------------------------------------------|
| 9 | Speed of current connection is 9600bps. |
|--------------+---------------------------------------------|
| 10 | Speed of current connection is 12Kbps. |
|--------------+---------------------------------------------|
| 11 | Speed of current connection is 14.4Kbps. |
|--------------+---------------------------------------------|
| 15 | Speed of current connection is 28.8Kbps. |
|--------------+---------------------------------------------|
| 16 | Speed of current connection is 16.8Kbps. |
|--------------+---------------------------------------------|
| 17 | Speed of current connection is 19.2Kbps. |
|--------------+---------------------------------------------|
| 19 | Speed of current connection is 31.2Kbps. |
|--------------+---------------------------------------------|
| 20 | Speed of current connection is 33.6Kbps. |
|--------------+---------------------------------------------|
| 29 | Speed of current connection is 24Kbps. |
|--------------+---------------------------------------------|
| 33 | Speed of current connection is 21.6Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE SPEED - DESIRED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S37=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum allowable data exchange |
| | rate attempted during handshake process. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S37=5 | Set speed to 1200bps. |
|--------------+---------------------------------------------|
| S37=6 | Set speed to 2400bps. |
|--------------+---------------------------------------------|
| S37=7 | Set speed to 4800bps. |
|--------------+---------------------------------------------|
| S37=8 | Set speed to 7200bps. |
|--------------+---------------------------------------------|
| S37=9 | Set speed to 9600bps. |
|--------------+---------------------------------------------|
| S37=10 | Set speed to 12Kbps. |
|--------------+---------------------------------------------|
| S37=11 | Set speed to 14.4Kbps. |
|--------------+---------------------------------------------|
| S37=15 | Set speed to 28.8Kbps. |
|--------------+---------------------------------------------|
| S37=16 | Set speed to 16.8Kbps. |
|--------------+---------------------------------------------|
| S37=17 | Set speed to 19.2Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE SPEED - DESIRED (CON'T) |
|------------------------------------------------------------|
| Command | Function |
|------------+-----------------------------------------------|
| S37=19 | Set speed to 31.2Kbps. |
|------------+-----------------------------------------------|
| S37=20 | Set speed to 33.6Kbps. |
|------------+-----------------------------------------------|
| S37=29 | Set speed to 24Kbps. |
|------------+-----------------------------------------------|
| S37=33 | Set speed to 21.6Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON-LINE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] On |
|--------------+---------------------------------------------|
| Description: | Instructs the modem to return to the |
| | 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 rate |
| | renegotiation sequence. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL SELECTION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S110=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects which protocols the modem will use |
| | when attempting to negotiate a connection. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S110=0 | Modem will attempt to connect with V.23, |
| | V.22bis, V.22, or Bell 212A. |
|--------------+---------------------------------------------|
| S110=1 | Modem will attempt to connect with V.32, |
| | V.23, V.22bis, V.22, or Bell 212A. |
|--------------+---------------------------------------------|
| S110=2 | Modem will attempt to connect with V.32bis |
| | only. |
|--------------+---------------------------------------------|
| S110=3 | Modem will attempt to connect with V.32bis, |
| | V.32, V.23, V.22bis, V.22, or Bell 212A. |
|--------------+---------------------------------------------|
| S110=4 | Modem will attempt to connect with |
| | V.32terbo only. |
|--------------+---------------------------------------------|
| S110=5 | Modem will attempt to connect with |
| | V.32terbo, V.32bis, V.32, V.23, V.22bis, |
| | V.22, or Bell 212A. |
|--------------+---------------------------------------------|
| S110=6 | Modem will attempt to connect with 33.6Kbps |
| | V.34 only. |
|--------------+---------------------------------------------|
| S110=7 | Modem will attempt to connect with 33.6Kbps |
| | V.34, V.32terbo, V.32bis, V.32, V.23, |
| | V.22bis, V.22, or Bell 212A. |
|--------------+---------------------------------------------|
| S110=8 | Modem will attempt to connect with V.34 |
| | only. |
|--------------+---------------------------------------------|
| í S110=9 | Modem will attempt to connect with V.34, |
| | V.32terbo, V.32bis, V.32, V.23, V.22bis, |
| | V.22, or Bell 212A. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL - 1200BPS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol the modem will use at |
| | 1200bps. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| 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 75/1200bps. |
|--------------+---------------------------------------------|
| B3 | Modem will use ITU-T V.23 at 1200/75bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL - 2400BPS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol the modem will use at |
| | 2400bps. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| B30 | Modem will use V.22bis at 2400bps. |
|--------------+---------------------------------------------|
| í B33 | Modem will use V.34 at 2400bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL - 4800BPS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol the modem will use at |
| | 4800bps. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| B41 | Modem will use V.32 at 4800bps. |
|--------------+---------------------------------------------|
| í B44 | Modem will use V.34 at 4800bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL - 9600BPS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol the modem will use at |
| | 9600bps. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| B52 | Modem will use V.32bis at 9600bps. |
|--------------+---------------------------------------------|
| í B53 | Modem will use V.34 at 9600bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL - 12KBPS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol the modem will use at |
| | 12Kbps. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| B70 | Modem will use V.32 at 12Kbps. |
|--------------+---------------------------------------------|
| í B72 | Modem will use V.34 at 12Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL - 14.4KBPS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol the modem will use at |
| | 14.4Kbps. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| B75 | Modem will use V.32bis at 14.4Kbps. |
|--------------+---------------------------------------------|
| í B77 | Modem will use V.34 at 14.4Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| S133 COMMAND |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %TE=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the S133 command has any |
| | function. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %TE=0 | S133 command has no function. |
|--------------+---------------------------------------------|
| %TE=1 | S133 command sets country code. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.32 - AUTO-RETRAIN |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls auto-retrain function if poor line |
| | quality is detected. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &B0 | Auto-retrain disabled, modem hangs up. |
|--------------+---------------------------------------------|
| í &B1 | Auto-retrain enabled, modem hangs up if |
| | retrain fails. |
|--------------+---------------------------------------------|
| &B2 | Auto-retrain disabled, modem does not hang |
| | up. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis DICTIONARY SIZE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "Nn [cmds] |
|--------------+---------------------------------------------|
| Default: | 2048 |
|--------------+---------------------------------------------|
| Range: | 512 - 2048 |
|--------------+---------------------------------------------|
| Unit: | 1 byte |
|--------------+---------------------------------------------|
| Description: | Selects the size of the V.42bis dictionary. |
+------------------------------------------------------------+