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# E-TECH RESEARCH, INC.
PC1414UX (REV. 2)
Modem Type Data (synchronous/asynchronous)/Fax
Maximum Data Rate 14.4Kbps
Maximum Fax Rate 14.4Kbps
Data Bus 8-bit ISA
Fax Class Class I & II
Data Modulation Protocol Bell 212A
ITU-T V.22, V.22bis, V.32, V.32bis
Fax Modulation Protocol ITU-T V.17, V.21CH2, V.27ter, V.29
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 | JP1 | JP2 | JP3 | JP4 | JP5 | JP6 |
|--------+--------+--------+--------+------+--------+--------|
| COM1: | Open | Open | Open | Open | Open | Closed |
| (3F8h) | | | | | | |
|--------+--------+--------+--------+------+--------+--------|
| COM2: | Closed | Open | Open | Open | Closed | Open |
| (2F8h) | | | | | | |
|--------+--------+--------+--------+------+--------+--------|
| COM3: | Open | Closed | Open | Open | Open | Closed |
| (3E8h) | | | | | | |
|--------+--------+--------+--------+------+--------+--------|
| COM4: | Closed | Closed | Open | Open | Closed | Open |
| (2E8h) | | | | | | |
|--------+--------+--------+--------+------+--------+--------|
| COM5: | Open | Open | Closed | Open | Open | Open |
| (3F0h) | | | | | | |
|--------+--------+--------+--------+------+--------+--------|
| COM6: | Closed | Open | Closed | Open | Open | Open |
| (2F0h) | | | | | | |
|--------+--------+--------+--------+------+--------+--------|
| COM7: | Open | Closed | Closed | Open | Open | Open |
| (3E0h) | | | | | | |
|--------+--------+--------+--------+------+--------+--------|
| COM8: | Closed | Closed | Closed | Open | Open | Open |
| (2E0h) | | | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | JP4 | JP5 | JP6 | JP7 | JP8 |
|-------+----------+----------+----------+---------+---------|
| 2 | Closed | Open | Open | Open | Open |
|-------+----------+----------+----------+---------+---------|
| 3 | Open | Closed | Open | Open | Open |
|-------+----------+----------+----------+---------+---------|
| 4 | Open | Open | Closed | Open | Open |
|-------+----------+----------+----------+---------+---------|
| 5 | Open | Open | Open | Closed | Open |
|-------+----------+----------+----------+---------+---------|
| 7 | Open | Open | Open | Open | Closed |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S14 |
|------------------------------------------------------------|
| Format | AT [cmds] S14=n [cmds] |
|-----------------+------------------------------------------|
| Example: | ATS14=138<CR> |
|-----------------+------------------------------------------|
| Default: | 138 |
|-----------------+------------------------------------------|
| Range: | 0-174 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped. |
|-----------------+------------------------------------------|
| Description: | Controls echo, result codes, result code |
| | display, dial mode, and answer/originate |
| | mode. |
|------------------------------------------------------------|
| Bit | Value | Function |
|----------+------------+------------------------------------|
| 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=n [cmds] |
|----------------+-------------------------------------------|
| Example: | ATS21=48<CR> |
|----------------+-------------------------------------------|
| Default: | 48 |
|----------------+-------------------------------------------|
| Range: | 0 - 189 |
|----------------+-------------------------------------------|
| Unit: | Bit-mapped. |
|----------------+-------------------------------------------|
| Description: | Selects jack type, CTS signal, low DTR |
| | action, DCD signal, and the Long Space |
| | Disconnect function. |
|------------------------------------------------------------|
| Bit | Value | Function |
|----------+-------+-----------------------------------------|
| 0 | » 0 | Selects RJ-11, RJ-41S, or RJ45S jack. |
| | | |
| | 1 | Selects RJ-12 or RJ-13 jack. |
|----------+-------+-----------------------------------------|
| 1 | 0 | Not used. |
|----------+-------+-----------------------------------------|
| 2 | » 0 | CTS follows RTS. |
| | | |
| | 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 | Not used. |
|----------+-------+-----------------------------------------|
| 7 | » 0 | Long Space Disconnect function |
| | | disabled. |
| | 1 | |
| | | Long Space Disconnect function enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S22 |
|------------------------------------------------------------|
| Format | AT [cmds] S22=n [cmds] |
|----------------+-------------------------------------------|
| Example: | ATS22=118<CR> |
|----------------+-------------------------------------------|
| Default: | 118 |
|----------------+-------------------------------------------|
| Range: | 0 - 255 |
|----------------+-------------------------------------------|
| Unit: | Bit-mapped. |
|----------------+-------------------------------------------|
| Description: | Controls volume and speaker settings, |
| | result codes, and make/break pulse ratio. |
|------------------------------------------------------------|
| Bit | Value | Function |
|-----------+--------+---------------------------------------|
| 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, |
| | | result codes 0-4 enabled. |
| | 100 | |
| | | Busy and dialtone detection disabled, |
| | 101 | result codes 0-5, 10 enabled. |
| | | |
| | 110 | Busy tone detection disabled, |
| | | dialtone detection enabled, result |
| | » 111 | codes 0-6, 10 enabled. |
| | | |
| | | Busy tone detection enabled, dialtone |
| | | detection disabled, result codes 0-5, |
| | | 7, 10 enabled. |
| | | |
| | | Busy and dialtone detection enabled, |
| | | result codes 0-7, 10 enabled. |
|-----------+--------+---------------------------------------|
| 7 | » 0 | 39/61ms at 10pps (North America) |
| | | |
| | 1 | 33/67ms at 10pps (Europe) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S23 |
|------------------------------------------------------------|
| Format | AT [cmds] S23=n [cmds] |
|------------------+-----------------------------------------|
| Example: | ATS23=28<CR> |
|------------------+-----------------------------------------|
| Default: | 28 |
|------------------+-----------------------------------------|
| Range: | 0-191 |
|------------------+-----------------------------------------|
| Unit: | Bit-mapped. |
|------------------+-----------------------------------------|
| Description: | Grants/denies remote digital loopback, |
| | controls DTE rate and parity, and sets |
| | guard tone. |
|------------------------------------------------------------|
| Bit | Value | Function |
|------------+--------+--------------------------------------|
| 0 | 0 | Remote digital loopback denied. |
| | | |
| | » 1 | Remote digital loopback allowed. |
|------------+--------+--------------------------------------|
| 3, 2, 1 | 000 | Sets serial port speed to 0-300bps. |
| | | |
| | 010 | Sets serial port speed to 1200bps. |
| | | |
| | 011 | Sets serial port speed to 2400bps. |
| | | |
| | 100 | Sets serial port speed to 4800bps. |
| | | |
| | 101 | Sets serial port speed to 9600bps. |
| | | |
| | » 110 | Sets serial port speed to 19.2Kbps. |
| | | |
| | 111 | Sets serial port speed to 38.4Kbps. |
|------------+--------+--------------------------------------|
| 5,4 | 00 | Parity even. |
| | | |
| | » 01 | Space parity. |
| | | |
| | 10 | Parity odd. |
| | | |
| | 11 | Mark or no parity. |
|------------+--------+--------------------------------------|
| 7, 6 | » 00 | Guard tone disabled. |
| | | |
| | 01 | Guard tone disabled. |
| | | |
| | 10 | Guard tone 1800Hz enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S27 |
|------------------------------------------------------------|
| Format | AT [cmds] S27=n [cmds] |
|-----------------+------------------------------------------|
| Example: | AT S27=0 <CR> |
|-----------------+------------------------------------------|
| Default: | 0 |
|-----------------+------------------------------------------|
| Range: | 0 - 119 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped. |
|-----------------+------------------------------------------|
| Description: | Selects sync/async mode, Line type, |
| | internal clock, and ITU-T/Bell modes. |
|------------------------------------------------------------|
| Bit | Value | Function |
|-----------+-------+----------------------------------------|
| 1, 0 | » 00 | Asynchronous mode, serial port speed |
| | | follows connect speed. |
| | 01 | |
| | | Asynchronous command mode and |
| | 10 | synchronous connect mode. |
| | | |
| | 11 | Asynchronous command mode and |
| | | synchronous connect mode, DTR dialing |
| | | enabled. |
| | | |
| | | Asynchronous command mode on low DTR, |
| | | synchronous connect mode on high DTR. |
|-----------+-------+----------------------------------------|
| 2 | » 0 | Dial up line. |
| | | |
| | 1 | Leased line. |
|-----------+-------+----------------------------------------|
| 3 | 0 | Not used. |
|-----------+-------+----------------------------------------|
| 5, 4 | » 00 | Modem generates clock. |
| | | |
| | 01 | DTE generates clock. |
| | | |
| | 10 | Modem generates clock from the receive |
| | | carrier signal. |
|-----------+-------+----------------------------------------|
| 6 | » 0 | CCITT mode. |
| | | |
| | 1 | Bell mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &M2 H1 DT555-1212<CR> |
|--------------+---------------------------------------------|
| Description: | Selects the active communications mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » &M0 | Asynchronous command and data modes. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL INTERRUPT |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *Pn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT *P9 S8=1<CR> |
|--------------+---------------------------------------------|
| Description: | Controls the dial interrupt. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » *P0 | Dial interrupt enabled. |
|--------------+---------------------------------------------|
| *P1 | Dial interrupt disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECHO DATA |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT \E0 <CR> |
|--------------+---------------------------------------------|
| Description: | Enables modem to echo received data. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » \E0 | Data echo disabled. |
|--------------+---------------------------------------------|
| \E1 | Data echo enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ESCAPE SEQUENCE MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *En [cmds] |
|--------------+---------------------------------------------|
| Example: | AT *E1<CR> |
|--------------+---------------------------------------------|
| Description: | Selects modem escape sequence mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| *E0 | Hayes ESC sequence mode. |
|--------------+---------------------------------------------|
| » *E1 | TIES ESC sequence mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION REJECTION |
|------------------------------------------------------------|
| Format | AT [cmds] S36=n [cmds] |
|-----------------+------------------------------------------|
| Example: | ATS36=0<CR> |
|-----------------+------------------------------------------|
| Default: | 7 |
|-----------------+------------------------------------------|
| Range: | 0 - 7 |
|-----------------+------------------------------------------|
| Unit: | Bit-mapped. |
|-----------------+------------------------------------------|
| Description: | Configures the modem’s behavior if an |
| | error-correcting connection cannot be |
| | made. |
|------------------------------------------------------------|
| Bit | Value | Function |
|-----------+--------+---------------------------------------|
| 0 - 2 | 000 | Modem disconnects. |
| | | |
| | 001 | Modem attempts MNP connection. If it |
| | | fails, modem attempts direct |
| | 011 | connection. |
| | | |
| | 100 | Modem attempts MNP connection. If it |
| | | fails, modem attempts normal |
| | 101 | connection. |
| | | |
| | » 111 | Modem attempts MNP connection. If it |
| | | fails, modem disconnects. |
| | | |
| | | Modem attempts MNP connection. If it |
| | | fails, modem attempts direct |
| | | connection. |
| | | |
| | | Modem attempts MNP connection. If it |
| | | fails, modem attempts normal |
| | | connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Ln [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &L H1 DT555-1212<CR> |
|--------------+---------------------------------------------|
| Description: | Selects line type. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » &L0 | Switched line. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 factory configuration. |
|--------------+---------------------------------------------|
| I2 | Reports firmware checksum. |
|--------------+---------------------------------------------|
| I4 | Reports firmware version. |
|--------------+---------------------------------------------|
| I5 | Reports Memory test. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL/SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *Nn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT *N6<CR> |
|--------------+---------------------------------------------|
| Description: | Selects the current DCE speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| *N0 | Select 1200bps speed. |
|--------------+---------------------------------------------|
| *N1 | Select 2400bps speed. |
|--------------+---------------------------------------------|
| *N2 | Select 4800bps speed. |
|--------------+---------------------------------------------|
| *N3 | Select 9600bps speed. |
|--------------+---------------------------------------------|
| *N4 | Select 7200bps speed. |
|--------------+---------------------------------------------|
| *N5 | Select 12Kbps speed. |
|--------------+---------------------------------------------|
| » *N6 | Select 14.4Kbps speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RETRAIN SENSITIVITY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *Qn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT &C3 *Q1<CR> |
|--------------+---------------------------------------------|
| Description: | Controls retrain. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| » *Q0 | Modem retrain disabled. |
|--------------+---------------------------------------------|
| *Q1 | Modem retrain enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SECURITY MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *Gn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT *G0<CR> |
|--------------+---------------------------------------------|
| Description: | Controls adaptive handshake. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| *G0 | Adaptive handshake disabled. |
|--------------+---------------------------------------------|
| » *G1 | Adaptive handshake enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Format | AT [cmds] S16=n [cmds] |
|---------------+--------------------------------------------|
| Example: | ATS16=40<CR> |
|---------------+--------------------------------------------|
| Default: | 0 |
|---------------+--------------------------------------------|
| Range: | 0-125 |
|---------------+--------------------------------------------|
| Unit: | Bit-mapped. |
|---------------+--------------------------------------------|
| Description: | Controls loopback tests, analog, digital, |
| | remote digital, and self tests. |
|------------------------------------------------------------|
| Bit | Value | Function |
|---------+-------+------------------------------------------|
| 0 | » 0 | Local analog loopback not in progress. |
| | | |
| | 1 | Local analog loopback in progress. |
|---------+-------+------------------------------------------|
| 1 | 0 | Not used. |
|---------+-------+------------------------------------------|
| 2 | » 0 | Local digital loopback not in progress. |
| | | |
| | 1 | Local digital loopback in progress. |
|---------+-------+------------------------------------------|
| 3 | » 0 | Modem not in remote digital loopback. |
| | | |
| | 1 | Remote digital loopback in progress. |
|---------+-------+------------------------------------------|
| 4 | » 0 | Remote digital loopback not requested. |
| | | |
| | 1 | Remote digital loopback requested. |
|---------+-------+------------------------------------------|
| 5 | » 0 | Remote digital loopback w/ self-test not |
| | | in progress. |
| | 1 | |
| | | Remote digital loopback w/ self-test in |
| | | progress. |
|---------+-------+------------------------------------------|
| 6 | » 0 | Local analog loopback w/ self-test not |
| | | in progress. |
| | 1 | |
| | | Local analog loopback w/ self-test in |
| | | progress. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMISSION LEVEL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *Xn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT *X4 &W<CR> |
|--------------+---------------------------------------------|
| Description: | Sets the signal level for transmission. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| *X0 | -2dBm. |
|--------------+---------------------------------------------|
| *X1 | -4dBm. |
|--------------+---------------------------------------------|
| *X2 | -6dBm. |
|--------------+---------------------------------------------|
| *X3 | -8dBm. |
|--------------+---------------------------------------------|
| » *X4 | -10dBm. |
|--------------+---------------------------------------------|
| *X5 | -12dBm. |
|--------------+---------------------------------------------|
| *X6 | -14dBm. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRELLIS MODULATION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *Tn [cmds] |
|--------------+---------------------------------------------|
| Example: | AT *T1<CR> |
|--------------+---------------------------------------------|
| Description: | Controls Trellis Coded Modulation. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| *T0 | Disables TCM. |
|--------------+---------------------------------------------|
| » *T1 | Enables TCM. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+