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# XIRCOM, INC.
CM-28
Card Type Modem (asynchronous)
Chip Set Unidentified
Maximum Data Rate 28.8Kbps
Maximum Fax Rate 14.4Kbps
Data Bus PCMCIA Type II
Fax Class Class I & II
Data Modulation AT&T V.32terbo
Protocol
Bell 212A
ITU-T V.22, V.22bis, V.23, V.32,
V.32bis, V.34
Fax Modulation ITU-T V.17, V.21CH2, V.27ter, V.29
Protocol
Error MNP5, V.42bis
Correction/Compression
V1914
Proprietary AT Command Set
+------------------------------------------------------------+
| ACCEPT RELIABLE MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \U [cmds] |
|--------------+---------------------------------------------|
| Description: | Accept remote’s request for reliable link |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-FALLBACK/FALL-FORWARD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects auto-fallback/fall-forward |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í %G0 | Auto-fallback/fall-forward disabled |
|--------------+---------------------------------------------|
| %G1 | Auto-fallback/fall-forward enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RELIABLE FALLBACK CHARACTER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %An [cmds] |
|--------------+---------------------------------------------|
| Default: | 13 |
|--------------+---------------------------------------------|
| Range: | 0-127 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets the character used as the |
| | auto-reliable fallback character; %A0 will |
| | disable this function. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RELIABLE TIME BUFFER CONFIGURATION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the handling of incoming data |
| | during auto-reliable time period |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \C0 | Data is discarded |
|--------------+---------------------------------------------|
| \C1 | Data is buffered |
|--------------+---------------------------------------------|
| \C2 | Data is discarded; modem returns to normal |
| | mode on receiving auto-reliable fallback |
| | character. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RETRAIN |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %En [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects auto-retrain mode |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %E0 | Auto-retrain disabled |
|--------------+---------------------------------------------|
| í %E1 | Auto-retrain enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BONG TONES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S121=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Select the type of credit card bong the |
| | modem will recognize |
|------------------------------------------------------------|
| Command | Function |
|----------------------------+-------------------------------|
| S121=0 | AT&T enabled |
|----------------------------+-------------------------------|
| S121=1 | MCI enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK SEND |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Bn [cmds] |
|--------------+---------------------------------------------|
| Default: | 3 |
|--------------+---------------------------------------------|
| Range: | 1-9 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sends break to modem |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|---------------------+--------------------------------------|
| Format: | AT [cmds] \Kn [cmds] |
|---------------------+--------------------------------------|
| Description: | Configures action of break signal |
|------------------------------------------------------------|
| Command | Break from | Modem receives | Break received |
| | DTE | \B | from remote |
| | | | modem |
|-----------+--------------+----------------+----------------|
| \K0 | Online | Break sent to | Buffers |
| | command mode | remote modem | cleared, break |
| | enabled, | and buffered | sent to DTE |
| | send no | cleared | |
| | break to | | |
| | remote modem | | |
|-----------+--------------+----------------+----------------|
| \K1 | Break sent | Break sent to | Buffers |
| | to remote | remote modem | cleared, break |
| | modem and | and buffered | sent to DTE |
| | buffered | cleared | |
| | cleared | | |
|-----------+--------------+----------------+----------------|
| \K2 | Online | Send break to | Break sent |
| | command mode | remote modem | immediately to |
| | enabled, | immediately | DTE |
| | send no | | |
| | break to | | |
| | remote modem | | |
|-----------+--------------+----------------+----------------|
| \K3 | Send break | Send break to | Break sent |
| | to remote | remote modem | immediately to |
| | modem | immediately | DTE |
| | immediately | | |
|-----------+--------------+----------------+----------------|
| \K4 | Online | Send break | Break sent |
| | command mode | with | with received |
| | enabled, | transmitted | data to the |
| | send no | data | DTE |
| | break to | | |
| | remote modem | | |
|-----------+--------------+----------------+----------------|
| í \K5 | Send break | Send break | Break sent |
| | with | with | with received |
| | transmitted | transmitted | data to the |
| | data | data | DTE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|--------------+---------------------------------------------|
| í -C0 | Disable calling tone |
|--------------+---------------------------------------------|
| -C1 | Enable calling tone |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | Data compression disabled |
|--------------+---------------------------------------------|
| í %C1 | Data compression 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 |
|--------------+---------------------------------------------|
| \N2 | Auto-reliable MNP mode |
|--------------+---------------------------------------------|
| í \N3 | Auto-reliable V.42 mode |
|--------------+---------------------------------------------|
| \N4 | Reliable V.42 mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COUNTRY CODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S133=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the country code needed |
|------------------------------------------------------------|
| Command | Function |
|-----------------------+------------------------------------|
| í S133=0 | United states |
|-----------------------+------------------------------------|
| S133=1 | United Kingdom |
|-----------------------+------------------------------------|
| S133=2 | Germany |
|-----------------------+------------------------------------|
| S133=3 | France |
|-----------------------+------------------------------------|
| S133=4 | Belgium |
|-----------------------+------------------------------------|
| S133=5 | Netherlands |
|-----------------------+------------------------------------|
| S133=6 | Italy |
|-----------------------+------------------------------------|
| S133=7 | Spain |
|-----------------------+------------------------------------|
| S133=8 | Austria |
|-----------------------+------------------------------------|
| S133=9 | Switzerland |
|-----------------------+------------------------------------|
| S133=10 | Portugal |
|-----------------------+------------------------------------|
| S133=11 | Sweden |
|-----------------------+------------------------------------|
| S133=12 | Norway |
|-----------------------+------------------------------------|
| S133=13 | Denmark |
|-----------------------+------------------------------------|
| S133=14 | Finland |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COUNTRY CODES (CONTINUED) |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S133n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the country code needed |
|------------------------------------------------------------|
| S133=15 | Cyprus |
|------------------------+-----------------------------------|
| S133=16 | Czechoslovakia |
|------------------------+-----------------------------------|
| S133=17 | Greece |
|------------------------+-----------------------------------|
| S133=18 | Hungry |
|------------------------+-----------------------------------|
| S133=19 | Poland |
|------------------------+-----------------------------------|
| S133=20 | Russia |
|------------------------+-----------------------------------|
| S133=21 | Turkey |
|------------------------+-----------------------------------|
| S133=22 | Luxembourg |
|------------------------+-----------------------------------|
| S133=23 | Iceland |
|------------------------+-----------------------------------|
| S133=25 | Egypt |
|------------------------+-----------------------------------|
| S133=26 | India |
|------------------------+-----------------------------------|
| S133=27 | Kenya |
|------------------------+-----------------------------------|
| S133=28 | South Africa |
|------------------------+-----------------------------------|
| S133=29 | Morocco |
|------------------------+-----------------------------------|
| S133=48 | Abu Dhabi |
|------------------------+-----------------------------------|
| S133=49 | Australia |
|------------------------+-----------------------------------|
| S133=50 | Bangladesh |
|------------------------+-----------------------------------|
| S133=51 | China |
|------------------------+-----------------------------------|
| S133=52 | Hong Kong |
|------------------------+-----------------------------------|
| S133=53 | Indonesia |
|------------------------+-----------------------------------|
| S133=54 | Japan |
|------------------------+-----------------------------------|
| S133=55 | Korea |
|------------------------+-----------------------------------|
| S133=56 | Malaysia |
|------------------------+-----------------------------------|
| S133=57 | New Zealand |
|------------------------+-----------------------------------|
| S133=58 | Philippines |
|------------------------+-----------------------------------|
| S133=59 | Singapore |
|------------------------+-----------------------------------|
| S133=96 | Argentina |
|------------------------+-----------------------------------|
| S133=97 | Bolivia |
|------------------------+-----------------------------------|
| S133=98 | Brazil |
|------------------------+-----------------------------------|
| S133=99 | Chile |
|------------------------+-----------------------------------|
| S133=100 | Colombia |
|------------------------+-----------------------------------|
| S133=101 | Costa Rica |
|------------------------+-----------------------------------|
| S133=102 | Guatemala |
|------------------------+-----------------------------------|
| S133=103 | Mexico |
|------------------------+-----------------------------------|
| S133=104 | Nicaragua |
|------------------------+-----------------------------------|
| S133=105 | Paraguay |
|------------------------+-----------------------------------|
| S133=106 | Peru |
|------------------------+-----------------------------------|
| S133=107 | Uruguay |
|------------------------+-----------------------------------|
| S133=108 | Venezuela |
|------------------------+-----------------------------------|
| S133=128 | Kuwait |
|------------------------+-----------------------------------|
| S133=129 | Oman |
|------------------------+-----------------------------------|
| S133=130 | Saudi Arabia |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Dials telephone number according to any |
| | modifiers included in the string |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| DP | Pulse dialing enabled |
|--------------+---------------------------------------------|
| DR | Dial in answer mode |
|--------------+---------------------------------------------|
| DS=n | Number in memory location n dialed |
|--------------+---------------------------------------------|
| D,(comma) | Dialing paused for amount of time specified |
| | in S8 register |
|--------------+---------------------------------------------|
| DT | Tone dialing enabled |
|--------------+---------------------------------------------|
| DW | Dialing resumed following dial tone |
| | detection |
|--------------+---------------------------------------------|
| D! | Flash function initiated; modem commanded |
| | to go on-hook for specified time |
|--------------+---------------------------------------------|
| D@ | Modem waits for a ring-back signal followed |
| | by silence up to the time specified in S7 |
| | prior to executing the rest of the dial |
| | string |
|--------------+---------------------------------------------|
| D; | Modem returned to command mode after |
| (semi-colon) | dialing |
|--------------+---------------------------------------------|
| D"" | Alphanumeric dialing switch; when a command |
| | like this is entered: ATDT1888"KICKME1", |
| (double | the modem changes the alpha characters into |
| quotes) | numbers; except for Q and Z. |
|--------------+---------------------------------------------|
| D$ | Waits for a bong tone up to the time |
| | specified in S7 prior to executing the rest |
| | of the dial string. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTE SPEED |
|------------------------------------------------------------|
| Type: | Register |
|---------------+--------------------------------------------|
| Format: | AT [cmds] S122=n [cmds] |
|---------------+--------------------------------------------|
| Description: | Selects the DTE speed that will be shown |
| | with CONNECT message |
|------------------------------------------------------------|
| Note: The modem doesn’t use DTE speed, however some |
| applications need this to attach to the CONNECT |
| message. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S122=0 | CONNECT |
|---------------+--------------------------------------------|
| S122=1 | CONNECT 1200 |
|---------------+--------------------------------------------|
| S122=2 | CONNECT 2400 |
|---------------+--------------------------------------------|
| S122=3 | CONNECT 4800 |
|---------------+--------------------------------------------|
| S122=4 | CONNECT 7200 |
|---------------+--------------------------------------------|
| S122=5 | CONNECT 9600 |
|---------------+--------------------------------------------|
| S122=6 | CONNECT 12000 |
|---------------+--------------------------------------------|
| S122=7 | CONNECT 14400 |
|---------------+--------------------------------------------|
| S122=8 | CONNECT 16800 |
|---------------+--------------------------------------------|
| S122=9 | CONNECT 19200 |
|---------------+--------------------------------------------|
| S122=10 | CONNECT 21600 |
|---------------+--------------------------------------------|
| S122=11 | CONNECT 24000 |
|---------------+--------------------------------------------|
| S122=12 | CONNECT 26400 |
|---------------+--------------------------------------------|
| S122=13 | CONNECT 28800 |
|---------------+--------------------------------------------|
| S122=14 | CONNECT 38400 |
|---------------+--------------------------------------------|
| S122=15 | CONNECT 57600 |
|---------------+--------------------------------------------|
| S122=16 | CONNECT 115200 |
|---------------+--------------------------------------------|
| S122=17 | CONNECT 230400 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Vn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects extended result codes |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \V0 | Extended result codes disabled |
|--------------+---------------------------------------------|
| \V1 | Extended result codes enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects modem port flow control |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \G0 | Flow control disabled |
|--------------+---------------------------------------------|
| \G1 | Flow control 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 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| \Q2 | Unidirectional CTS/RTS flow control enabled |
|--------------+---------------------------------------------|
| í \Q3 | Bidirectional CTS/RTS flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Tn [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-90 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INITIATE RELIABLE MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \O [cmds] |
|--------------+---------------------------------------------|
| Description: | Initiates reliable link from normal or |
| | direct mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERNATIONAL SETTINGS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %TEn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables the use of S133 for countries that |
| | require special modem settings |
|------------------------------------------------------------|
| Command | Function |
|-----------------------------+------------------------------|
| í %TE=0 | Disable S133 |
|-----------------------------+------------------------------|
| %TE=1 | Enabled S133 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP SCREENS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT$ |
|--------------+---------------------------------------------|
| Description: | Shows command help screens for all commands |
| | beginning with the given prefix, or no |
| | prefix if none is given. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP SCREEN - BORDERS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S120=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Places a border around the help screen text |
|------------------------------------------------------------|
| Command | Function |
|------------------+-----------------------------------------|
| S120=0 | Enabled; uses IBM graphics characters. |
|------------------+-----------------------------------------|
| í S120=1 | Disabled; no borders. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MAXIMUM BLOCK SIZE FOR TRANSMISSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \An [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum transmittable block size |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \A0 | MNP block size is 64 characters |
|--------------+---------------------------------------------|
| \A1 | MNP block size is 128 characters |
|--------------+---------------------------------------------|
| \A2 | MNP block size is 192 characters |
|--------------+---------------------------------------------|
| í \A3 | MNP block size is 256 characters |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL/SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S43=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the current DCE speed |
|------------------------------------------------------------|
| Command | Function |
|---------------------+--------------------------------------|
| S43=5 | Set to 1200bps |
|---------------------+--------------------------------------|
| S43=6 | Set to 2400bps |
|---------------------+--------------------------------------|
| S43=7 | Set to 4800bps |
|---------------------+--------------------------------------|
| S43=8 | Set to 7200bps |
|---------------------+--------------------------------------|
| S43=9 | Set to 9600bps |
|---------------------+--------------------------------------|
| S43=10 | Set to 12Kbps |
|---------------------+--------------------------------------|
| S43=11 | Set to 14.4Kbps |
|---------------------+--------------------------------------|
| S43=12 | Set to 19.2Kbps |
|---------------------+--------------------------------------|
| S43=15 | Set to 28.8Kbps |
|---------------------+--------------------------------------|
| S43=26 | Set to 16.8Kbps |
|---------------------+--------------------------------------|
| S43=29 | Set to 24Kbps |
|---------------------+--------------------------------------|
| S43=33 | Set to 21.6Kbps |
|---------------------+--------------------------------------|
| S43=34 | Set to 26.4Kbps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REDIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] DL |
|--------------+---------------------------------------------|
| Description: | Redials the last number dialed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays modem properties |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Display product code |
|--------------+---------------------------------------------|
| I1 | Display ROM checksum |
|--------------+---------------------------------------------|
| I2 | Verify ROM checksum result |
|--------------+---------------------------------------------|
| I3 | Display firmware revision |
|--------------+---------------------------------------------|
| I4 | Display modem characteristics |
|--------------+---------------------------------------------|
| I6 | Reports current connection’s statistics |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SWITCH TO NORMAL MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Z [cmds] |
|--------------+---------------------------------------------|
| Description: | Switches to normal mode from reliable mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SWITCH TO RELIABLE MODE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Y [cmds] |
|--------------+---------------------------------------------|
| Description: | Switches to reliable mode from normal or |
| | direct mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42 - DETECTION PHASE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] -Jn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls V.42 detection |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| -J0 | V.42 detection disabled |
|--------------+---------------------------------------------|
| í -J1 | V.42 detection enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis - COMPRESSION CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "Hn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls V.42bis data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| "H0 | V.42bis disabled |
|--------------+---------------------------------------------|
| "H1 | V.42bis when transmitting enabled |
|--------------+---------------------------------------------|
| "H2 | V.42bis when receiving enabled |
|--------------+---------------------------------------------|
| í "H3 | V.42bis when transmitting/receiving enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis - DICTIONARY SIZE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "Nn [cmds] |
|--------------+---------------------------------------------|
| Default: | Unidentified |
|--------------+---------------------------------------------|
| Range: | 512-2048 |
|--------------+---------------------------------------------|
| Unit: | Character |
|--------------+---------------------------------------------|
| Description: | Select V.42 dictionary size |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis - MAXIMUM STRING LENGTH |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "On [cmds] |
|--------------+---------------------------------------------|
| Default: | 32 |
|--------------+---------------------------------------------|
| Range: | 6-250 |
|--------------+---------------------------------------------|
| Unit: | Characters |
|--------------+---------------------------------------------|
| Description: | Selects string size for V.42bis compression |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XON/XOFF PASS-THROUGH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Xn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether XON/XOFF signals are sent |
| | to remote modem |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í \X0 | XON/XOFF signals trapped by local modem |
|--------------+---------------------------------------------|
| \X1 | XON/XOFF passed through local modem |