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# E-TECH RESEARCH, INC.
PC288MX (REV. 2)
Modem Type Data (synchronous/asynchronous)/Fax
Maximum Data Rate 28.8Kbps
Maximum Fax Rate 14.4Kbps
Data Bus 8-bit ISA
Fax Class Class I
Data Modulation Bell 103A/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.23, V.32,
V.32bis, V.34
AT&T V.32terbo
Fax Modulation ITU-T V.17, V.21Ch2, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Line out | CN1 | Line in | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS SELECTION |
|------------------------------------------------------------|
| Port | SW1/1 | SW1/2 | SW1/3 | SW1/5 |
|--------------+-----------+-----------+----------+----------|
| COM1: (3F8h) | On | Off | On | Off |
|--------------+-----------+-----------+----------+----------|
| COM2: (2F8h) | On | Off | Off | On |
|--------------+-----------+-----------+----------+----------|
| COM3: (3E8h) | Off | On | On | Off |
|--------------+-----------+-----------+----------+----------|
| COM4: (2E8h) | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | SW1/4 | SW1/6 | SW1/7 | SW1/8 |
|----------+------------+------------+-----------+-----------|
| 2 | Off | Off | Off | On |
|----------+------------+------------+-----------+-----------|
| 3 | Off | On | Off | Off |
|----------+------------+------------+-----------+-----------|
| 4 | On | Off | Off | Off |
|----------+------------+------------+-----------+-----------|
| 5 | Off | Off | On | Off |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| AUTO FALLBACK CHARACTER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S43=n [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S43=13 <CR> |
|--------------+---------------------------------------------|
| Description: | Set auto fallback character during MNP |
| | negotiation. (%An) |
|--------------+---------------------------------------------|
| Notes | S43=0, disabled. S43=(1 - 127), enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO FALL FORWARD/FALLBACK |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Gn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT %G &W <CR> |
|--------------+---------------------------------------------|
| Description: | Selects auto fallback. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %G0 | Fallback disabled. |
|--------------+---------------------------------------------|
| » %G1 | Fallback enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RELIABLE FALLBACK CHARACTER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %An [cmds] |
|--------------+---------------------------------------------|
| Example: | AT%A20<CR> |
|--------------+---------------------------------------------|
| 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] |
|--------------+---------------------------------------------|
| Example: | AT \C1 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Controls the handling of incoming data |
| | during auto-reliable time period. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » \CO | Data is discarded. |
|--------------+---------------------------------------------|
| \C1 | Data is buffered. |
|--------------+---------------------------------------------|
| \C2 | Data is discarded, sets to normal mode and |
| | sends auto-reliable character to serial |
| | port. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-RETRAIN |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT %En |
|--------------+---------------------------------------------|
| Example: | AT %E1 <CR> |
|--------------+---------------------------------------------|
| Description: | Selects auto-retrain mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %E0 | Auto-retrain disabled. |
|--------------+---------------------------------------------|
| » %E1 | Auto-retrain enabled. |
|--------------+---------------------------------------------|
| %E2 | Do not hang up and auto-retrain disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO SLEEP TIMER |
|------------------------------------------------------------|
| Format | AT [cmds] S46=n [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S46= 100<CR> |
|--------------+---------------------------------------------|
| Default: | 255 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | .1 second. |
|--------------+---------------------------------------------|
| Description: | Maximum duration of DTE and DCE inactivity |
| | allowed prior to initiating low-power sleep |
| | mode. 255 = disable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S14 |
|------------------------------------------------------------|
| Format | AT [cmds] S14? [cmds] |
|-----------------+------------------------------------------|
| Example: | ATS14?<CR> |
|-----------------+------------------------------------------|
| Default: | Read only |
|-----------------+------------------------------------------|
| Range: | 0-174 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped. |
|-----------------+------------------------------------------|
| Description: | Controls echo, result codes, result code |
| | display, dial mode, and answer/originate |
| | mode. |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|----------+------------+------------------------------------|
| 0 | 0 | Not used. |
|----------+------------+------------------------------------|
| 1 | 0 | Command echo disabled. |
| | | |
| | » 1 | Command echo enabled. |
|----------+------------+------------------------------------|
| 2 | » 0 | Result codes enabled. |
| | | |
| | 1 | Result codes disabled. |
|----------+------------+------------------------------------|
| 3 | 0 | Display result codes in numeric |
| | | format. |
| | » 1 | |
| | | Display result codes in verbose |
| | | format. |
|----------+------------+------------------------------------|
| 4 | 0 | Not used. |
|----------+------------+------------------------------------|
| 5 | 0 | Tone dial enabled. |
| | | |
| | » 1 | Pulse dial enabled. |
|----------+------------+------------------------------------|
| 6 | 0 | Not used. |
|----------+------------+------------------------------------|
| 7 | 0 | Answer mode enabled. |
| | | |
| | » 1 | Originate mode enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S21 |
|------------------------------------------------------------|
| Format | AT [cmds] S21? [cmds] |
|-----------------+------------------------------------------|
| Example: | ATS21?<CR> |
|-----------------+------------------------------------------|
| Default: | Read only |
|-----------------+------------------------------------------|
| Range: | 0 - 124 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped. |
|-----------------+------------------------------------------|
| Description: | Controls CTS, low DTR action, and DCD |
| | signal. |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|-----------+-------+----------------------------------------|
| 1, 0 | 00 | Not used. |
|-----------+-------+----------------------------------------|
| 2 | » 0 | CTS follows RTS. Synchronous modes |
| | | only. |
| | 1 | |
| | | CTS forced high. |
|-----------+-------+----------------------------------------|
| 4, 3 | 00 | DTR signal ignored. |
| | | |
| | 01 | Modem goes to command mode on low DTR. |
| | | |
| | » 10 | Modem disconnects on low DTR. |
| | | Auto-Answer is disabled. |
| | 11 | |
| | | Modem is initialized on low DTR. |
|-----------+-------+----------------------------------------|
| 5 | 0 | DCD forced high. |
| | | |
| | » 1 | DCD normal. |
|-----------+-------+----------------------------------------|
| 6 | » 0 | DSR forced high. |
| | | |
| | 1 | DSR normal. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S22 |
|------------------------------------------------------------|
| Format | AT [cmds] S22? [cmds] |
|----------------+-------------------------------------------|
| Example: | ATS22?<CR> |
|----------------+-------------------------------------------|
| Default: | Read only |
|----------------+-------------------------------------------|
| Range: | 0 - 255 |
|----------------+-------------------------------------------|
| Unit: | Bit-mapped. |
|----------------+-------------------------------------------|
| Description: | Controls volume and speaker settings, |
| | result codes, and make/break pulse ratio. |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|-----------+-------+----------------------------------------|
| 1, 0 | 00 | Lowest volume setting. |
| | | |
| | 01 | Low volume setting. |
| | | |
| | » 10 | Medium volume setting |
| | | |
| | 11 | Highest volume setting. |
|-----------+-------+----------------------------------------|
| 3, 2 | 00 | Speaker disabled. |
| | | |
| | » 01 | Speaker enabled until carrier signal |
| | | detected |
| | 10 | |
| | | Speaker enabled. |
| | 11 | |
| | | Speaker enabled following dialing, |
| | | then disabled after carrier signal |
| | | detected. |
|-----------+-------+----------------------------------------|
| 6, 5 ,4 | 000 | Busy and dialtone detection disabled. |
| | | |
| | 100 | Busy and dialtone detection disabled. |
| | | |
| | 101 | Busy tone detection disabled, dialtone |
| | | detection enabled. |
| | 110 | |
| | | Busy tone detection enabled, dialtone |
| | » 111 | detection disabled. |
| | | |
| | | Busy and dialtone detection enabled. |
|-----------+-------+----------------------------------------|
| 7 | » 0 | Pulse dialing at 39/61ms at 10pps. |
| | | |
| | 1 | Pulse dialing at 33/67ms at 10pps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S23 |
|------------------------------------------------------------|
| Format | AT [cmds] S23? [cmds] |
|------------------+-----------------------------------------|
| Example: | ATS23?<CR> |
|------------------+-----------------------------------------|
| Default: | Read only |
|------------------+-----------------------------------------|
| Range: | 0-241 |
|------------------+-----------------------------------------|
| Unit: | Bit-mapped. |
|------------------+-----------------------------------------|
| Description: | Grants/denies remote digital loopback, |
| | controls parity, and sets guard tone. |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|------------+---------+-------------------------------------|
| 0 | 0 | Remote digital loopback denied. |
| | | |
| | » 1 | Remote digital loopback allowed. |
|------------+---------+-------------------------------------|
| 3, 2, 1 | 000 | Not used. |
|------------+---------+-------------------------------------|
| 5,4 | 00 | Parity even. |
| | | |
| | » 01 | Parity Space. |
| | | |
| | 10 | Parity odd. |
| | | |
| | 11 | Parity Mark. |
|------------+---------+-------------------------------------|
| 7, 6 | » 00 | Guard tone disabled. |
| | | |
| | 01 | Guard tone 550Hz enabled. |
| | | |
| | 10 | Guard tone 1800Hz enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S27 |
|------------------------------------------------------------|
| Format | AT [cmds] S27? [cmds] |
|-----------------+------------------------------------------|
| Example: | AT S27? <CR> |
|-----------------+------------------------------------------|
| Default: | Read only |
|-----------------+------------------------------------------|
| Range: | 0 - 127 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped. |
|-----------------+------------------------------------------|
| Description: | Selects sync/async mode, Line type, |
| | internal clock, and ITU-T/Bell modes. |
|------------------------------------------------------------|
| Bit | Value | Function |
|------------+-------+---------------------------------------|
| 3, 1, 0 | » 000 | Asynchronous mode, serial port speed |
| | | follows connect speed. |
| | 001 | |
| | | Asynchronous command mode and |
| | 010 | synchronous connect mode. |
| | | |
| | 011 | Asynchronous command mode and |
| | | synchronous connect mode, DTR dialing |
| | 100 | enabled. |
| | | |
| | | Asynchronous command mode on low DTR, |
| | | synchronous connect mode on high DTR. |
| | | |
| | | Hayes AutoSync™ mode - serial port |
| | | locked at 9600bps. |
|------------+-------+---------------------------------------|
| 2 | » 0 | Dial up line. |
| | | |
| | 1 | Leased line. |
|------------+-------+---------------------------------------|
| 5, 4 | » 00 | Internal DTE transmit clock source. |
| | | |
| | 01 | External DTE transmit clock source. |
| | | |
| | 10 | Slave DTE transmit clock source. |
|------------+-------+---------------------------------------|
| 6 | 0 | CCITT mode. |
| | | |
| | » 1 | Bell mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S44 |
|------------------------------------------------------------|
| Format | AT [cmds] S44? [cmds] |
|-----------------+------------------------------------------|
| Example: | AT S44? <CR> |
|-----------------+------------------------------------------|
| Default: | Read only. |
|-----------------+------------------------------------------|
| Range: | 0-23 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped. |
|-----------------+------------------------------------------|
| Description: | Selects V.42 status, V.42bis, and |
| | fallback. |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|-----------+-------+----------------------------------------|
| 0 | 0 | V.42bis status disabled. |
| | | |
| | » 1 | V.42bis status enabled. |
|-----------+-------+----------------------------------------|
| 2, 1 | 00 | V.42bis disabled. |
| | | |
| | 01 | V.42bis when transmitting enabled. |
| | | |
| | 10 | V.42bis when receiving enabled. |
| | | |
| | » 11 | V.42bis when transmitting/receiving |
| | | enabled. |
|-----------+-------+----------------------------------------|
| 3 | 0 | Not used. |
|-----------+-------+----------------------------------------|
| 4 | 0 | Fallback disabled. |
| | | |
| | » 1 | Fallback enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S51 |
|------------------------------------------------------------|
| Format | AT [cmds] S51? [cmds] |
|----------------+-------------------------------------------|
| Example: | AT S51? <CR> |
|----------------+-------------------------------------------|
| Default: | Read only. |
|----------------+-------------------------------------------|
| Range: | 0 - 115 |
|----------------+-------------------------------------------|
| Unit: | Bit-mapped. |
|----------------+-------------------------------------------|
| Description: | Display flow control. |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|-----------+-------+----------------------------------------|
| 2, 1, 0 | 000 | Flow control disabled. |
| | | |
| | 001 | XON/XOFF flow control enabled. |
| | | |
| | 010 | CTS flow control to DTE enabled. |
| | | |
| | » 011 | RTS/CTS flow control enabled. |
|-----------+-------+----------------------------------------|
| 3 | 0 | Not used. |
|-----------+-------+----------------------------------------|
| 4 | » 0 | Flow control disabled. |
| | | |
| | 1 | Flow control to XON/XOFF flow enabled. |
|-----------+-------+----------------------------------------|
| 5 | » 0 | Serial speed locked. |
| | | |
| | 1 | Serial speed follows connect speed. |
|-----------+-------+----------------------------------------|
| 7, 6 | » 00 | XON/XOFF signals trapped by local |
| | | modem. |
| | 01 | |
| | | XON/XOFF passed through local modem. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S54 |
|------------------------------------------------------------|
| Format | AT [cmds] S54? [cmds] |
|-----------------+------------------------------------------|
| Example: | AT S54? <CR> |
|-----------------+------------------------------------------|
| Default: | Read only. |
|-----------------+------------------------------------------|
| Range: | 0 - 131 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped |
|-----------------+------------------------------------------|
| Description: | Displays the communication protocol for |
| | data calls, and protocol result code. |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|-----------+-----------+------------------------------------|
| 0 | 0 | B2 is enabled. |
| | | |
| | 1 | B2 is not enabled. |
|-----------+-----------+------------------------------------|
| 1 | 0 | B3 is enabled |
| | | |
| | 1 | B3 is not enabled. |
|-----------+-----------+------------------------------------|
| 6 - 2 | 0 | Not used. |
|-----------+-----------+------------------------------------|
| 7 | 0 | Protocol result code disabled. |
| | | |
| | 1 | Protocol result code enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK SEND |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Bn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \B3 &W<CR> |
|--------------+---------------------------------------------|
| Range: | 1-9 |
|--------------+---------------------------------------------|
| Unit: | 100 ms. |
|--------------+---------------------------------------------|
| Description: | Sends break to modem. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
|Type: |Configuration |
|------------+-----------------------------------------------|
|Format: |AT [cmds] \Kn [cmds] |
|------------+-----------------------------------------------|
|Example: |AT \K1 <CR> |
|------------+-----------------------------------------------|
|Description:|Configures action of break signal. |
|------------------------------------------------------------|
| Command | Break from DTE |Break from DTE| Break from |
| | | |remote modem |
| | Reliable/Normal | Direct mode | |
| | mode | | |
|-------------+-----------------+--------------+-------------|
| \K0 |Enter command |Send break to |Buffers |
| |mode, do not send|remote modem |cleared and |
| |break to remote |immediately, |break sent to|
| |modem. |then enter |DTE. |
| | |command mode. | |
|-------------+-----------------+--------------+-------------|
| \K1 |Buffers cleared |Send break to |Buffers |
| |and break sent to|remote modem |cleared and |
| |remote modem. |immediately. |break sent to|
| | | |DTE. |
|-------------+-----------------+--------------+-------------|
| \K2 |Enter command |Send break to |Send break to|
| |mode, do not send|remote modem |DTE |
| |break to remote |immediately, |immediately. |
| |modem. |then enter | |
| | |command mode. | |
|-------------+-----------------+--------------+-------------|
| \K3 |Send break to |Send break to |Send break to|
| |remote modem |remote modem |DTE |
| |immediately. |immediately. |immediately. |
|-------------+-----------------+--------------+-------------|
| \K4 |Enter command |Send break to |Break sent |
| |mode, do not send|remote modem |with received|
| |break to remote |immediately, |data to the |
| |modem. |then enter |DTE. |
| | |command mode. | |
|-------------+-----------------+--------------+-------------|
|» \K5 |Send break with |Send break to |Break sent |
| |transmitted data.|remote modem |with received|
| | |immediately. |data to the |
| | | |DTE. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT %Cn |
|--------------+---------------------------------------------|
| Example: | AT *EC0 %C1 *AP0<CR> |
|--------------+---------------------------------------------|
| Description: | Selects data compression. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | Data compression disabled. |
|--------------+---------------------------------------------|
| %C1 | MNP 5 enabled. |
|--------------+---------------------------------------------|
| %C2 | V.42bis enabled. |
|--------------+---------------------------------------------|
| » %C3 | MNP 5 and V.42bis enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT $Cn |
|--------------+---------------------------------------------|
| Example: | AT *EC0 $C1 *AP0<CR> |
|--------------+---------------------------------------------|
| Description: | Selects data compression. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| $C0 | Data compression disabled. |
|--------------+---------------------------------------------|
| » $C1 | Data compression enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Nn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \N1 DT555-1212<CR> |
|--------------+---------------------------------------------|
| Description: | Sets connect mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \N0 | Normal mode enabled. |
|--------------+---------------------------------------------|
| \N1 | Direct mode enabled. |
|--------------+---------------------------------------------|
| \N2 | MNP mode only enabled. |
|--------------+---------------------------------------------|
| » \N3 | LAP-M mode with fallback to MNP and normal |
| | modes enabled. |
|--------------+---------------------------------------------|
| \N4 | LAP-M mode with fallback to MNP enabled. |
|--------------+---------------------------------------------|
| \N5 | LAP-M mode only enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT $E1 DT555-1212<CR> |
|--------------+---------------------------------------------|
| Description: | Sets connect mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| $E0 | Normal mode enabled. |
|--------------+---------------------------------------------|
| $E1 | MNP mode with fallback to normal mode |
| | enabled. |
|--------------+---------------------------------------------|
| $E2 | MNP mode only enabled. |
|--------------+---------------------------------------------|
| » $E3 | LAP-M mode with fallback to MNP and normal |
| | modes enabled. |
|--------------+---------------------------------------------|
| $E4 | LAP-M mode only enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY AUTO-RELIABLE BUFFER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S48? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S48? <CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays auto-reliable buffer settings. |
| | (\Cn) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| » 0 | Data is discarded. |
|--------------+---------------------------------------------|
| 1 | Data is buffered. |
|--------------+---------------------------------------------|
| 2 | Data is discarded, modem returns to normal |
| | mode on receiving auto-reliable fallback |
| | character. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONNECT MESSAGE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S41? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S41? <CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Connect message display. (Wn) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| » 0 | Connect with DTE speed. |
|--------------+---------------------------------------------|
| 1 | Connect with carrier, protocol, and |
| | compression. |
|--------------+---------------------------------------------|
| 2 | Connect with DCE speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY FAX/DATA MODE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S50? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S50?<CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays data or FAX mode. |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| » 0 | Data mode enabled. |
|--------------+---------------------------------------------|
| 1 | FAX mode enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S52?[cmds] |
|--------------+---------------------------------------------|
| Example: | AT S52?<CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays type of flow control used by |
| | modem. (&Kn) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| S52=0 | Flow control disabled. |
|--------------+---------------------------------------------|
| S52=1 | Not used. |
|--------------+---------------------------------------------|
| S52=2 | Not used. |
|--------------+---------------------------------------------|
| » S52=3 | CTS/RTS flow control enabled. |
|--------------+---------------------------------------------|
| S52=4 | XON/XOFF pass-through flow control enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY MAXIMUM BLOCK SIZE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S49? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S49?<CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays maximum block size. (\An) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 63 | Maximum MNP block size is 64 characters. |
|--------------+---------------------------------------------|
| 127 | Maximum MNP block size is 128 characters. |
|--------------+---------------------------------------------|
| 191 | Maximum MNP block size is 192 characters. |
|--------------+---------------------------------------------|
| » 255 | Maximum MNP block size is 256 characters. |
|--------------+---------------------------------------------|
| 31 | Maximum MNP block size is 32 characters. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY MODEM OPERATING MODE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S53? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S53? <CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays connect mode. (\Nn) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | Normal mode enabled. |
|--------------+---------------------------------------------|
| 1 | Direct mode enabled. |
|--------------+---------------------------------------------|
| 2 | MNP reliable mode enabled. |
|--------------+---------------------------------------------|
| 4 | LAP-M mode enabled. |
|--------------+---------------------------------------------|
| 6 | LAP-M mode with fallback to MNP enabled. |
|--------------+---------------------------------------------|
| » 7 | LAP-M, MNP, or Normal mode enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY MNP OPTIONS |
|------------------------------------------------------------|
| Format | AT [cmds] S59? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S59?<CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays MNP5 status. (%Cn) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | Data compression disabled. |
|--------------+---------------------------------------------|
| 1 | MNP 5 enabled. |
|--------------+---------------------------------------------|
| 2 | V.42bis enabled. |
|--------------+---------------------------------------------|
| » 3 | MNP 5 and V.42bis enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY PROTOCOL - V.42 DETECTION |
|------------------------------------------------------------|
| Format | AT [cmds] S40? [cmds] |
|----------------+-------------------------------------------|
| Example: | AT S40? <CR> |
|----------------+-------------------------------------------|
| Default: | Read-only |
|----------------+-------------------------------------------|
| Range: | 0-65 |
|----------------+-------------------------------------------|
| Unit: | Bit-mapped. |
|----------------+-------------------------------------------|
| Description: | Controls active protocols and V.42 |
| | detection. (Nn and -Jn) |
|------------------------------------------------------------|
| Bit | Value | Meaning |
|----------+-------+-----------------------------------------|
| 0 | 0 | Automatic mode-detection disabled |
| | | |
| | » 1 | In originate mode, handshake begins |
| | | at line speed designated by the S37 |
| | | register. Modem can shift to a slower |
| | | speed if necessary. |
| | | |
| | | In answer mode, handshake attempted |
| | | with the following protocols in order |
| | | - V.32terbo, V.32bis, V.32, V.22bis, |
| | | V.22 or Bell 212, V.21, and Bell 103 |
|----------+-------+-----------------------------------------|
| 5 - 1 | 0 | Not used. |
|----------+-------+-----------------------------------------|
| 6 | 0 | V.42 detection disabled. |
| | | |
| | » 1 | V.42 detection enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY V.32 RETRAIN |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S42?[cmds] |
|--------------+---------------------------------------------|
| Example: | AT S42? <CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Selects action the modem will take during |
| | bad line quality on V.32/32bis connection. |
| | (%En) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | Auto-retrain disabled, hang up. |
|--------------+---------------------------------------------|
| 1 | Auto-retrain on line quality problem |
| | enabled. |
|--------------+---------------------------------------------|
| 2 | Modem ignores line quality problems. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTE RATE STATUS |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S62? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S62? <CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays DTE rate. |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | 300 bps. |
|--------------+---------------------------------------------|
| 1 | 600 bps. |
|--------------+---------------------------------------------|
| 2 | 1200 bps. |
|--------------+---------------------------------------------|
| 3 | 2400 bps. |
|--------------+---------------------------------------------|
| 4 | 4800 bps. |
|--------------+---------------------------------------------|
| 5 | 7200 bps. |
|--------------+---------------------------------------------|
| 6 | 9600 bps. |
|--------------+---------------------------------------------|
| 7 | 12Kbps. |
|--------------+---------------------------------------------|
| 8 | 14.4Kbps. |
|--------------+---------------------------------------------|
| 9 | 16.8Kbps. |
|--------------+---------------------------------------------|
| 10 | 19.2Kbps. |
|--------------+---------------------------------------------|
| 11 | 21.6Kbps. |
|--------------+---------------------------------------------|
| 12 | 24Kbps. |
|--------------+---------------------------------------------|
| 13 | 26.4Kbps. |
|--------------+---------------------------------------------|
| 14 | 28.8Kbps. |
|--------------+---------------------------------------------|
| 15 | 38.4Kbps. |
|--------------+---------------------------------------------|
| » 16 | 57.6Kbps. |
|--------------+---------------------------------------------|
| 17 | 115.2Kbps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Gn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \G1 &K3<CR> |
|--------------+---------------------------------------------|
| Description: | Selects modem port flow control. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » \G0 | Flow control disabled. |
|--------------+---------------------------------------------|
| \G1 | Flow control enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Qn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \Q0 A <CR> |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \Q0 | Flow control disabled. |
|--------------+---------------------------------------------|
| \Q1 | XON/XOFF flow control enabled. |
|--------------+---------------------------------------------|
| \Q2 | CTS flow control to DTE enabled. |
|--------------+---------------------------------------------|
| » \Q3 | RTS/CTS flow control enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $Fn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &G1 $F3 <CR> |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| $F0 | XON/XOFF flow control enabled. |
|--------------+---------------------------------------------|
| $F1 | XON/XOFF pass-through flow control enabled. |
|--------------+---------------------------------------------|
| » $F4 | CTS/RTS flow control enabled. |
|--------------+---------------------------------------------|
| $F5 | Flow control disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Tn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT\T20<CR> |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 1-90 |
|--------------+---------------------------------------------|
| Unit: | 1 minute. |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects. \T0 disables the timer. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCAL SERIAL PORT SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S72=n [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S72=00 *OS0 *SC1<CR> |
|--------------+---------------------------------------------|
| Description: | Sets serial port speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » S72=0 | Sets speed automatically. |
|--------------+---------------------------------------------|
| S72=1 | Sets 300bps speed. |
|--------------+---------------------------------------------|
| S72=2 | Sets 600bps speed. |
|--------------+---------------------------------------------|
| S72=3 | Sets 1200bps speed. |
|--------------+---------------------------------------------|
| S72=4 | Sets 2400bps speed. |
|--------------+---------------------------------------------|
| S72=5 | Sets 4800bps speed. |
|--------------+---------------------------------------------|
| S72=6 | Sets 7200bps speed. |
|--------------+---------------------------------------------|
| S72=7 | Sets 9600bps speed. |
|--------------+---------------------------------------------|
| S72=8 | Sets 12Kbps speed. |
|--------------+---------------------------------------------|
| S72=9 | Sets 14.4Kbps speed. |
|--------------+---------------------------------------------|
| S72=10 | Sets 16.8Kbps speed. |
|--------------+---------------------------------------------|
| S72=11 | Sets 19.2Kbps speed. |
|--------------+---------------------------------------------|
| S72=12 | Sets 21.6Kbps speed. |
|--------------+---------------------------------------------|
| S72=13 | Sets 24Kbps speed. |
|--------------+---------------------------------------------|
| S72=14 | Sets 26.4Kbps speed. |
|--------------+---------------------------------------------|
| S72=15 | Sets 28.8Kbps speed. |
|--------------+---------------------------------------------|
| S72=16 | Sets 38.4Kbps speed. |
|--------------+---------------------------------------------|
| S72=17 | Sets 57.6Kbps speed. |
|--------------+---------------------------------------------|
| S72=18 | Sets 115.2Kbps speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCK SERIAL PORT |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Jn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT %L3 %B14 \J0<CR> |
|--------------+---------------------------------------------|
| Description: | Sets operation of serial port speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » \J0 | Serial speed locked. |
|--------------+---------------------------------------------|
| \J1 | Serial speed follows connect speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOOPBACK TESTS |
|------------------------------------------------------------|
| Format | AT [cmds] S16=n [cmds] |
|----------------+-------------------------------------------|
| Example: | ATS16=32<CR> |
|----------------+-------------------------------------------|
| Default: | 0 |
|----------------+-------------------------------------------|
| Range: | 0 - 125 |
|----------------+-------------------------------------------|
| Unit: | Bit-mapped. |
|----------------+-------------------------------------------|
| Description: | Enables loopback tests. |
|------------------------------------------------------------|
| Bit | Value | Function |
|----------+-------+-----------------------------------------|
| 0 | » 0 | Local analog loopback test disabled. |
| | | |
| | 1 | Local analog loopback test enabled. |
|----------+-------+-----------------------------------------|
| 1 | 0 | Not used. |
|----------+-------+-----------------------------------------|
| 2 | » 0 | Local digital loopback test disabled. |
| | | |
| | 1 | Local digital loopback test enabled. |
|----------+-------+-----------------------------------------|
| 3 | » 0 | Modem is not performing remote digital |
| | | loopback test. |
| | 1 | |
| | | Modem is performing remote digital |
| | | loopback test. |
|----------+-------+-----------------------------------------|
| 4 | » 0 | Remote digital loopback test disabled. |
| | | |
| | 1 | Remote digital loopback test enabled. |
|----------+-------+-----------------------------------------|
| 5 | » 0 | Remote digital loopback with local |
| | | self-test disabled. |
| | 1 | |
| | | Remote digital loopback with local |
| | | self-test enabled. |
|----------+-------+-----------------------------------------|
| 6 | » 0 | Local analog loopback with local |
| | | self-test disabled. |
| | 1 | |
| | | Local analog loopback with local |
| | | self-test enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MAXIMUM BLOCK SIZE FOR TRANSMISSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \An [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \A3 &MB28800<CR> |
|--------------+---------------------------------------------|
| Description: | Sets the maximum transmittable block size. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \A0 | Maximum MNP block size is 64 characters. |
|--------------+---------------------------------------------|
| \A1 | Maximum MNP block size is 128 characters. |
|--------------+---------------------------------------------|
| \A2 | Maximum MNP block size is 192 characters. |
|--------------+---------------------------------------------|
| » \A3 | Maximum MNP block size is 256 characters. |
|--------------+---------------------------------------------|
| \A4 | Maximum MNP block size is 32 characters. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL RESULT CODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Vn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \V0 Q0 <CR> |
|--------------+---------------------------------------------|
| Description: | \V responds when conjunction with W0 and W2 |
| | commands. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \V1 | Protocol result code disabled. |
|--------------+---------------------------------------------|
| » \V0 | Protocol result code enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL/SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S37n [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S37=00 <CR> |
|--------------+---------------------------------------------|
| Description: | Selects the current DCE speed. |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| » S37=0 | Select last ATspeed. |
|--------------+---------------------------------------------|
| S37=3 | Select 300bps speed. |
|--------------+---------------------------------------------|
| S37=5 | Select 1200bps speed. |
|--------------+---------------------------------------------|
| S37=6 | Select 2400bps speed. |
|--------------+---------------------------------------------|
| S37=7 | Select 4800bps speed. |
|--------------+---------------------------------------------|
| S37=8 | Select 7200bps speed. |
|--------------+---------------------------------------------|
| S37=9 | Select 9600bps speed. |
|--------------+---------------------------------------------|
| S37=10 | Select 12Kbps speed. |
|--------------+---------------------------------------------|
| S37=11 | Select 14.4Kbps speed. |
|--------------+---------------------------------------------|
| S37=12 | Select 16.8Kbps speed. |
|--------------+---------------------------------------------|
| S37=13 | Select 19.2Kbps speed. |
|--------------+---------------------------------------------|
| S37=14 | Select 21.6Kbps speed. |
|--------------+---------------------------------------------|
| S37=15 | Select 24Kbps speed. |
|--------------+---------------------------------------------|
| S37=16 | Select 26.4Kbps speed. |
|--------------+---------------------------------------------|
| S37=17 | Select 28.8Kbps speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Example: | AT I1 O<CR> |
|--------------+---------------------------------------------|
| Description: | Displays modem properties. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product code. |
|--------------+---------------------------------------------|
| I1 | Reports 3-digit ROM checksum result. |
|--------------+---------------------------------------------|
| I2 | Reports OK. |
|--------------+---------------------------------------------|
| I3 | Reports firmware version. |
|--------------+---------------------------------------------|
| I4 | Reports OEM string. |
|--------------+---------------------------------------------|
| I5 | Reports country code. |
|--------------+---------------------------------------------|
| I9 | Reports checksum result of Flash-ROM. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ROUND TRIP DELAY |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S65? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S65? <CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Units: | .1 second. |
|--------------+---------------------------------------------|
| Description: | Displays the round trip delay. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42 DETECTION PHASE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] -Jn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT -J1 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Controls V.42 detection. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| -J0 | V.42 detection disabled. |
|--------------+---------------------------------------------|
| » -J1 | V.42 detection enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis COMPRESSION CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "Hn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT "H3 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Controls V.42bis data compression. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| "H0 | V.42bis disabled. |
|--------------+---------------------------------------------|
| "H1 | V.42bis when transmitting enabled. |
|--------------+---------------------------------------------|
| "H2 | V.42bis when receiving enabled. |
|--------------+---------------------------------------------|
| » "H3 | V.42bis when transmitting/receiving |
| | enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis DICTIONARY SIZE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "Nn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT "N2 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Controls V.42 dictionary size. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| "N0 | 512 bytes. |
|--------------+---------------------------------------------|
| "N1 | 1024 bytes. |
|--------------+---------------------------------------------|
| » "N2 | 1536 bytes. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis DICTIONARY SIZE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S57? [cmds] |
|--------------+---------------------------------------------|
| Example: | AT S57? <CR> |
|--------------+---------------------------------------------|
| Default: | Read only. |
|--------------+---------------------------------------------|
| Description: | Displays V.42bis dictionary size. ("Nn) |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | 512 bytes. |
|--------------+---------------------------------------------|
| 1 | 1024 bytes. |
|--------------+---------------------------------------------|
| » 2 | 1536 bytes. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis MAXIMUM STRING LENGTH |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] "On [cmds] |
|--------------+---------------------------------------------|
| Example: | AT "O32 <CR> |
|--------------+---------------------------------------------|
| Default: | 32 |
|--------------+---------------------------------------------|
| Range: | 6 - 64 |
|--------------+---------------------------------------------|
| Unit: | Unidentified. |
|--------------+---------------------------------------------|
| Description: | Selects string size for V.42bis |
| | compression. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XON/XOFF PASS-THROUGH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Xn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \X7 O<CR> |
|--------------+---------------------------------------------|
| Description: | Selects whether XON/XOFF signals are sent |
| | to remote modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » \X0 | XON/XOFF signals trapped by local modem. |
|--------------+---------------------------------------------|
| \X1 | XON/XOFF passed through local modem. |
+------------------------------------------------------------+