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# TELEBIT CORPORATION
T1500
Card Type Modem (synchronous/asynchronous)
Chipset Unidentified
Maximum Data Rate 9600bps
Data Bus Serial
Data Modulation Bell 103A/212A
ITU-T V.22, V.22bis, V.32
Error Correction/Compression MNP5
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------+-------+-------------------------+-------|
| Line out | CN1 | Power switch | SW1 |
|------------------+-------+-------------------------+-------|
| Line in | CN2 | Talk/Data switch | SW2 |
|------------------+-------+-------------------------+-------|
| RS-232 port | CN3 | User profile 0/1 switch | SW3 |
|------------------+-------+-------------------------+-------|
| DC power in | CN4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MI/MIC OR A/A1 SELECTION |
|------------------------------------------------------------|
| Setting | E6 | E7 |
|-------------------+-------------------+--------------------|
| í MI/MIC mode | Pins 1 & 2 closed | Pins 1 & 2 closed |
|-------------------+-------------------+--------------------|
| A/A1 mode | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMISSION LEVEL SELECTION |
|------------------------------------------------------------|
| Setting | R51 |
|------------------------------+-----------------------------|
| 0 dBm | 20K ohm |
|------------------------------+-----------------------------|
| -1 dBm | 22.6K ohm |
|------------------------------+-----------------------------|
| -2 dBm | 24.9K ohm |
|------------------------------+-----------------------------|
| -3 dBm | 28K ohm |
|------------------------------+-----------------------------|
| -4 dBm | 31.6K ohm |
|------------------------------+-----------------------------|
| -5 dBm | 35.7K ohm |
|------------------------------+-----------------------------|
| -6 dBm | 40.2K ohm |
|------------------------------+-----------------------------|
| -7 dBm | 44.2K ohm |
|------------------------------+-----------------------------|
| -8 dBm | 49.9K ohm |
|------------------------------+-----------------------------|
| í -9 dBm | 56.2K ohm |
|------------------------------+-----------------------------|
| -10 dBm | 63.4K ohm |
|------------------------------+-----------------------------|
| -11 dBm | 71.5K ohm |
|------------------------------+-----------------------------|
| -12 dBm | 78.7K ohm |
|------------------------------+-----------------------------|
| -13 dBm | 88.7K ohm |
|------------------------------+-----------------------------|
| -14 dBm | 100K ohm |
|------------------------------+-----------------------------|
| -15 dBm | 113K ohm |
|------------------------------------------------------------|
| Note: Manufacturer suggests using a resistor with a |
| 1% tolerance. For this resistor to take effect, |
| register S102 must not be set to a programmable mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) (MODE SELECTION) |
|------------------------------------------------------------|
| CD | MR | Condition |
|---------------+---------------+----------------------------|
| Off | On | Modem is indicating |
| | | asynchronous extended |
| | | command mode |
|---------------+---------------+----------------------------|
| Off | Blinking | User has selected |
| | | asynchronous extended |
| | | command mode |
|---------------+---------------+----------------------------|
| On | Off | Modem is indicating |
| | | asynchronous standard |
| | | command mode |
|---------------+---------------+----------------------------|
| Blinking | Off | User has selected |
| | | asynchronous standard |
| | | command mode |
|---------------+---------------+----------------------------|
| On | On | Modem is indicating |
| | | synchronous V.32 mode |
|---------------+---------------+----------------------------|
| Blinking | Blinking | User has selected |
| | | synchronous V.32 mode |
|------------------------------------------------------------|
| Note: To enter mode selection, hold down SW2 while |
| powering the modem on. Pressing SW2 briefly cycles |
| through modes, and holding SW2 down for at least two |
| seconds selects the current mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) (NORMAL OPERATION) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+--------------+--------+------------------------------|
| CD | Unidentified | On | Carrier signal detected |
|-----+--------------+--------+------------------------------|
| CD | Unidentified | Off | Carrier signal not detected |
|-----+--------------+--------+------------------------------|
| OH | Unidentified | On | Modem is off-hook |
|-----+--------------+--------+------------------------------|
| OH | Unidentified | Off | Modem is on-hook |
|-----+--------------+--------+------------------------------|
| RD | Unidentified | On | Modem is receiving data |
|-----+--------------+--------+------------------------------|
| RD | Unidentified | Off | Modem is not receiving data |
|-----+--------------+--------+------------------------------|
| SD | Unidentified | On | Modem is transmitting data |
|-----+--------------+--------+------------------------------|
| SD | Unidentified | Off | Modem is not transmitting |
| | | | data |
|-----+--------------+--------+------------------------------|
| CTS | Unidentified | On | CTS signal is high |
|-----+--------------+--------+------------------------------|
| CTS | Unidentified | Off | CTS signal is low |
|-----+--------------+--------+------------------------------|
| DTR | Unidentified | On | DTR signal is high |
|-----+--------------+--------+------------------------------|
| DTR | Unidentified | Off | DTR signal is low |
|-----+--------------+--------+------------------------------|
| MR | Unidentified | On | Power is on |
|-----+--------------+--------+------------------------------|
| MR | Unidentified | Off | Power is off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS (STANDARD MODE) |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, B, D, E, F, H, I, L, M, N, O, Q, V, W, X, Y, Z |
|------------------------------------------------------------|
| &C, &D, &F, &G, &J, &K, &L, &M, &P, &Q, &R, &S, &T, &V, |
| &W, &X, &Y, &Z |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S18, S25, S26, S36, S37, S38 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS (ENHANCED MODE) |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, C, E, F, H, M, O, V, W, Y |
|------------------------------------------------------------|
| &P, &T |
|------------------------------------------------------------|
| S-Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S18, S25, S26, S38 |
|------------------------------------------------------------|
| Note: See MHI documentation for complete information. |
+------------------------------------------------------------+
Proprietary AT Command Set (Standard Mode)
+------------------------------------------------------------+
| ENHANCED MODE COMMAND |
|------------------------------------------------------------|
| Type: | Special |
|--------------+---------------------------------------------|
| Format: | AT ~[cmd] |
|--------------+---------------------------------------------|
| Example: | AT ~I4 &X1 ~S150=2<CR> |
|--------------+---------------------------------------------|
| Description: | The command immediately following the ~ |
| | character will be executed as an enhanced |
| | mode command. No other commands on the |
| | command line will be affected. |
|--------------+---------------------------------------------|
| Note: | This character may be changed by register |
| | S222. |
+------------------------------------------------------------+
Proprietary AT Command Set (Enhanced Mode)
+------------------------------------------------------------+
| ANSWER/ORIGINATE MODE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S100=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem answers and |
| | originates calls normally or in the reverse |
| | mode. |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| í S100=0 | Modem answers calls in answer mode and |
| | originates calls in originate mode. |
|----------------+-------------------------------------------|
| S100=1 | Modem answers calls in originate mode and |
| | originates calls in answer mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ASYNC/SYNC MODE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S150=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the operating mode of the modem. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í S150=0 | Modem will operate in asynchronous mode. |
|---------------+--------------------------------------------|
| S150=2 | Modem will operate in synchronous mode. |
| | The RS-232 secondary transmit/receive pair |
| | may be used to connect a command terminal |
| | to enter commands and receive result |
| | codes. |
|---------------+--------------------------------------------|
| S150=3 | Modem will operate in asynchronous mode |
| | will in command mode, and synchronous |
| | while in connect mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUTO-CONNECT |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S101=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will attempt to |
| | connect automatically when no carrier is |
| | detected even when no call has been made or |
| | received. |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| í S101=0 | Modem does not attempt to auto-connect. |
|----------------+-------------------------------------------|
| S101=1 | Modem attempts to connect in answer mode |
| | every 20 seconds. |
|----------------+-------------------------------------------|
| S101=2 | Modem attempts to connect in originate |
| | mode every 20 seconds. |
|----------------+-------------------------------------------|
| S101=3 | Modem attempts to connect in answer mode |
| | immediately after carrier is lost, then |
| | pauses 20 seconds before retrying. |
|----------------+-------------------------------------------|
| S101=4 | Modem attempts to connect in originate |
| | mode immediately after carrier is lost, |
| | then pauses 20 seconds before retrying. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S54=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Configures the modem’s reaction to a break |
| | signal. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í S54=0 | Online command mode enabled, break not |
| | sent to remote modem. |
|---------------+--------------------------------------------|
| S54=3 | Modem sends break in sequence when in data |
| | mode, and immediately when in command |
| | mode. |
|---------------+--------------------------------------------|
| S54=4 | Break signal ignored. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD SIGNAL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S131=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the behaviour of the CD signal. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S131=0 | CD forced high. |
|---------------+--------------------------------------------|
| S131=1 | CD normal. |
|---------------+--------------------------------------------|
| í S131=2 | CD is brought high when modem is ready in |
| | command mode or is ready to accept data. |
|---------------+--------------------------------------------|
| S131=3 | CD is brought high when modem is ready in |
| | command mode or is ready to accept |
| | incoming data. When modem disconnects, DSR |
| | is brought low for time specified by S47. |
|---------------+--------------------------------------------|
| S131=4 | CD follows the inverse of CTS. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK SOURCE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S154=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects where the modem derives the clock |
| | used in synchronous modes. |
|------------------------------------------------------------|
| Command | Function |
|------------------+-----------------------------------------|
| í S154=0 | Modem uses internal clock source. |
|------------------+-----------------------------------------|
| S154=1 | Modem uses external clock source. |
|------------------+-----------------------------------------|
| S154=2 | Modem is a slave to received clock |
| | source. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND SET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &B |
|--------------+---------------------------------------------|
| Description: | Disables the AT command set. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND SET TYPE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S63=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the AT prefix is required |
| | in command mode, and which form of the AT |
| | command set will be used. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S63=0 | AT prefix not required and enhanced |
| | command set enabled. All characters |
| | entered in command mode will be assumed to |
| | be commands. |
|---------------+--------------------------------------------|
| S63=1 | AT prefix required for command mode and |
| | enhanced command set enabled. |
|---------------+--------------------------------------------|
| S63=2 | AT prefix required for command mode and |
| | standard command set enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S95=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the type of MNP mode connection |
| | that the modem will attempt to make. |
|------------------------------------------------------------|
| Command | Function |
|-----------------+------------------------------------------|
| í S95=0 | Normal mode connection only. |
|-----------------+------------------------------------------|
| S95=1 | MNP reliable mode connection only. |
|-----------------+------------------------------------------|
| S95=2 | MNP auto-reliable mode connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CTS SIGNAL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S67=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the behaviour of the CTS signal. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í S67=0 | CTS is forced high. |
|---------------+--------------------------------------------|
| S67=1 | CTS follows RTS. When RTS goes high, there |
| | is a 200 mS delay before CTS follows. |
|---------------+--------------------------------------------|
| S67=2 | CTS follows RTS. When RTS goes high, there |
| | is a delay specified by S26 before CTS |
| | follows. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA COMPRESSION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S96=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will attempt to |
| | use MNP data compression. |
|------------------------------------------------------------|
| Command | Function |
|----------------------+-------------------------------------|
| S96=0 | Data compression disabled. |
|----------------------+-------------------------------------|
| í S96=1 | Data compression enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Dials the telephone number indicated |
| | according to any modifiers included in the |
| | string. |
|--------------+---------------------------------------------|
| Note: | Any combination of modifiers can be used to |
| | produce the desired dial functions in |
| | sequence. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| DP | Pulse dialing enabled. |
|--------------+---------------------------------------------|
| DR | Answer mode enabled; originate mode |
| | disabled following handshake initiation. |
|--------------+---------------------------------------------|
| DNn | Dial stored telephone number n. |
|--------------+---------------------------------------------|
| DT | Tone dialing enabled. |
|--------------+---------------------------------------------|
| DW | Dialing resumed following dial tone |
| | detection. |
|--------------+---------------------------------------------|
| D, | Dialing paused for amount of time specified |
| | in S8 register. |
|--------------+---------------------------------------------|
| D! | Flash function initiated. Modem commanded |
| | to go off-hook for specified time before |
| | returning on-hook. |
|--------------+---------------------------------------------|
| D; | Modem returned to idle state after dialing. |
| | The semicolon can only be placed at the end |
| | of the dial command. |
|--------------+---------------------------------------------|
| D\x\ | Dials the stored telephone number with |
| | description x. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL INTERRUPT |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S64=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will abort a |
| | dial, answer, or connect sequence if |
| | characters are received from the DTE. |
|------------------------------------------------------------|
| Command | Function |
|-----------------------+------------------------------------|
| í S64=0 | Sequence aborted. |
|-----------------------+------------------------------------|
| S64=1 | Sequence not aborted. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONFIGURATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the specified configuration stored |
| | in non-volatile RAM. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &N0 | Display profile specified by S255. |
|--------------+---------------------------------------------|
| &N1 | Display profile 0. |
|--------------+---------------------------------------------|
| &N2 | Display profile 1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DSR DELAY ON DISCONNECT |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S47=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 4 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | 50 mS |
|--------------+---------------------------------------------|
| Description: | Sets the time that DSR is forced low after |
| | disconnect. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DSR SIGNAL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S130=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the behaviour of the DSR signal. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S130=0 | DSR is forced high. |
|---------------+--------------------------------------------|
| S130=1 | DSR is brought high when an answer tone is |
| | sent or received. |
|---------------+--------------------------------------------|
| í S130=2 | DSR is brought high when modem is ready in |
| | command mode or is ready to accept data. |
|---------------+--------------------------------------------|
| S130=3 | DSR is brought high when modem is ready in |
| | command mode or is ready to accept data. |
| | When modem disconnects, DSR is brought low |
| | for time specified by S47. |
|---------------+--------------------------------------------|
| S130=4 | DSR is brought high when modem goes off |
| | hook. |
|---------------+--------------------------------------------|
| S130=5 | DSR follows remote carrier. |
|---------------+--------------------------------------------|
| S130=6 | If modem is off line and DTR goes high, |
| | DSR will be brought high. If DTR is high |
| | and a connection is made, DSR will be |
| | brought high. If DTR goes low or carrier |
| | is lost, DSR will be brought low. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTR DIALING |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S104=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will auto-dial |
| | the first stored number on DTR signal |
| | changes. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í S104=0 | DTR dialing disabled. |
|---------------+--------------------------------------------|
| S104=1 | Modem auto-dials stored number specified |
| | by the current configuration on |
| | low-to-high DTR change. |
|---------------+--------------------------------------------|
| S104=3 | Modem auto-dials stored number specified |
| | by the current configuration when SW2 is |
| | pressed. |
|---------------+--------------------------------------------|
| S104=4 | When DTR goes high, the modem will connect |
| | in answer mode if the value stored in |
| | register S1 is greater than that stored in |
| | S0. Otherwise, it will connect in |
| | originate mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTR SIGNAL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S52=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the modem’s response to the DTR |
| | signal. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S52=0 | Modem assumes DTR is forced high. |
|---------------+--------------------------------------------|
| í S52=1 | Modem goes idle on low DTR. |
|---------------+--------------------------------------------|
| S52=2 | Modem is reset on low DTR. |
|---------------+--------------------------------------------|
| S52=3 | Modem enters command mode on low DTR. |
|---------------+--------------------------------------------|
| S52=4 | Modem disconnects, disables auto-answer, |
| | and enters command mode on low DTR. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EIGHTH BIT FILTER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S48=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the high bit of a character |
| | is cleared before detection of XON, XOFF |
| | and escape characters. |
|------------------------------------------------------------|
| Command | Function |
|-----------------------+------------------------------------|
| í S48=0 | Eighth bit is cleared. |
|-----------------------+------------------------------------|
| S48=1 | Eighth bit is not cleared. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ESCAPE SEQUENCE RESPONSE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S55=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Configures the modem’s reaction to an |
| | escape sequence. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í S55=0 | Modem returns to command mode after set |
| | guard time has passed and escape |
| | characters sent to remote modem. |
|---------------+--------------------------------------------|
| S55=1 | Buffers are cleared and escape characters |
| | sent to remote modem. |
|---------------+--------------------------------------------|
| S55=2 | Escape characters sent to remote modem |
| | immediately. |
|---------------+--------------------------------------------|
| S55=3 | Escape characters sent with transmitted |
| | data. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ENHANCED MODE CHARACTER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S222=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 126 |
|--------------+---------------------------------------------|
| Range: | 0 - 127 |
|--------------+---------------------------------------------|
| Unit: | 1 ASCII character |
|--------------+---------------------------------------------|
| Description: | Sets the character used in standard mode to |
| | execute enhanced mode commands. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY DEFAULT PROFILE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Fn [cmds] |
|--------------+---------------------------------------------|
| Description: | Returns the command settings to the values |
| | found in one of the factory default |
| | profiles. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| &F0 | Restores enhanced mode settings. |
|---------------+--------------------------------------------|
| &F1 | Restores standard mode settings. |
|---------------+--------------------------------------------|
| &F3 | Restores V.32 synchronous mode settings. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL CHARACTER - XOFF |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S57=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 19 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets the character used to represent the |
| | XOFF character. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL CHARACTER - XON |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S56=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 17 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets the character used to represent the |
| | XON character. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE - DCE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S68=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by the |
| | modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S68=0 | Flow control disabled. |
|--------------+---------------------------------------------|
| S68=2 | Bidirectional RTS/CTS flow control enabled. |
|--------------+---------------------------------------------|
| S68=3 | Bidirectional XON/XOFF flow control |
| | enabled. |
|--------------+---------------------------------------------|
| S68=4 | Bidirectional XON/XOFF and RTS/CTS enabled. |
|--------------+---------------------------------------------|
| S68=5 | Flow control disabled; ENQ/ACK characters |
| | sent to remote modem. |
|--------------+---------------------------------------------|
| S68=6 | Bidirectional XON/XOFF enabled; ENQ/ACK |
| | characters sent to remote modem. |
|--------------+---------------------------------------------|
| í S68=255 | Use flow control specified in S58. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE - DTE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S58=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by the DTE. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S58=0 | Flow control disabled. |
|--------------+---------------------------------------------|
| S58=1 | Unidirectional RTS flow control enabled. |
|--------------+---------------------------------------------|
| S58=2 | Bidirectional RTS/CTS flow control enabled. |
|--------------+---------------------------------------------|
| í S58=3 | Bidirectional XON/XOFF flow control |
| | enabled. |
|--------------+---------------------------------------------|
| S58=4 | Bidirectional XON/XOFF and RTS/CTS enabled. |
|--------------+---------------------------------------------|
| S58=5 | Flow control disabled; ENQ/ACK characters |
| | sent to remote modem. |
|--------------+---------------------------------------------|
| S58=6 | Bidirectional XON/XOFF enabled; ENQ/ACK |
| | characters sent to remote modem. |
|--------------+---------------------------------------------|
| S58=7 | Transparent XON/XOFF enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FREQUENCY OFFSET |
|------------------------------------------------------------|
| Type: | Read-only |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S77? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the frequency offset for the |
| | current connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| GUARD TONE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S91=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Commands the modem to transmit a guard tone |
| | in V.22/V.22bis mode. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S91=0 | Guard tone disabled. |
|--------------+---------------------------------------------|
| S91=1 | 1800Hz guard tone enabled. |
|--------------+---------------------------------------------|
| S91=2 | 550Hz guard tone enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S41=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE OUT PINS |
|------------------------------------------------------------|
| Format: | AT [cmds] S102=n [cmds] |
|----------------+-------------------------------------------|
| Default: | 0 |
|----------------+-------------------------------------------|
| Range: | 0 - 6 |
|----------------+-------------------------------------------|
| Description: | Selects the functions, if any, of pins 3 |
| | & 6 and 7 & 8 of the RJ-45 telephone line |
| | out jack. |
|------------------------------------------------------------|
| Bit | Value | Function |
|----------+-------+-----------------------------------------|
| 1, 0 | í 00 | Pins 3 & 6 have no function. |
| | | |
| | 01 | Pins 3 & 6 are A/A1 signals. |
| | | |
| | 10 | Pins 3 & 6 are MI/MIC signals. |
|------------------------------------------------------------|
| 2 | í 0 | Pins 7 & 8 have no function; modem is |
| | | in permissive or normal transmission |
| | 1 | level. |
| | | |
| | | Pins 7 & 8 are to set the programmable |
| | | transmission level. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE QUALITY |
|------------------------------------------------------------|
| Type: | Read-only |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S78? [cmds] |
|--------------+---------------------------------------------|
| Default: | N/A |
|--------------+---------------------------------------------|
| Range: | 0 - 100 |
|--------------+---------------------------------------------|
| Unit: | N/A |
|--------------+---------------------------------------------|
| Description: | Displays the quality of the current |
| | connection. Larger numbers indicate a |
| | better connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCAL SERIAL PORT SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S51=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the speed at which the modem will |
| | communicate with the host computer. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S51=0 | Set speed to 300bps. |
|---------------+--------------------------------------------|
| S51=1 | Set speed to 1200bps. |
|---------------+--------------------------------------------|
| S51=2 | Set speed to 2400bps. |
|---------------+--------------------------------------------|
| S51=3 | Set speed to 4800bps. |
|---------------+--------------------------------------------|
| í S51=4 | Set speed to 9600bps. |
|---------------+--------------------------------------------|
| S51=5 | Set speed to 19.2Kbps. |
|---------------+--------------------------------------------|
| S51=252 | Auto-detect speed from received "A" or "a" |
| | character. User may not type new command |
| | until result code is displayed. |
|---------------+--------------------------------------------|
| S51=254 | Auto-detect speed from received "A" or "a" |
| | character. This speed is used until |
| | disconnect, reset, or received break. User |
| | may type new command before result code is |
| | displayed. If no command has been entered |
| | since the modem has been powered on, |
| | assume next command will be at 19.2Kbps. |
|---------------+--------------------------------------------|
| S51=255 | Auto-detect speed from received "A" or "a" |
| | character. This speed is used until |
| | disconnect, reset, or received break. User |
| | may type new command before result code is |
| | displayed. If no command has been entered |
| | since the modem has been powered on, |
| | assume next command will be at 9600bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCK SERIAL PORT |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S66=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets operation of serial port speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S66=0 | Serial port speed follows connect speed. |
|--------------+---------------------------------------------|
| S66=1 | Serial port speed locked. |
|--------------+---------------------------------------------|
| S66=2 | Serial port speed locked. Use flow control |
| | in connect mode but not in command mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PRODUCT ID NUMBER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S49=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects what the modem will report as its |
| | product ID number. |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| í S49=0 | Modem reports normal ID number. |
|----------------+-------------------------------------------|
| S49=1 | Modem reports 123 as its ID number. |
|----------------+-------------------------------------------|
| S49=2 | Modem reports 965 (TrailBlazer Plus) as |
| | its ID number. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROMPT CHARACTER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S59=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | 1 ASCII character |
|--------------+---------------------------------------------|
| Description: | Sets what character will be used as a |
| | prompt when in command mode. If S59 is set |
| | to 0 then no prompt will be given. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL/SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S50=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the protocol used for |
| | communications. |
|------------------------------------------------------------|
| Command | Function |
|-----------------+------------------------------------------|
| í S50=0 | Auto-detect fastest common protocol. |
|-----------------+------------------------------------------|
| S50=1 | Use Bell 103. |
|-----------------+------------------------------------------|
| S50=2 | Use Bell 212A or V.22. |
|-----------------+------------------------------------------|
| S50=3 | Use V.22bis. |
|-----------------+------------------------------------------|
| S50=6 | Use V.32. |
|-----------------+------------------------------------------|
| S50=254 | Use speed of last AT command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROTOCOL SELECTION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S90=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects which protocol will be used when |
| | making 1200bps connections. |
|------------------------------------------------------------|
| Command | Function |
|----------------------------+-------------------------------|
| í S90=0 | Use Bell 212A. |
|----------------------------+-------------------------------|
| S90=1 | Use V.22. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports modem model and revision. |
|--------------+---------------------------------------------|
| I1 | Reports total of error codes for executed |
| | tests. |
|--------------+---------------------------------------------|
| I2 | Reports the current connect mode. |
|--------------+---------------------------------------------|
| I4 | Reports current connection statistics. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects when result codes will be reported. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í Q0 | All result codes will be reported. |
|---------------+--------------------------------------------|
| Q1 | Only remote result codes will be reported. |
|---------------+--------------------------------------------|
| Q2 | Only local result codes will be reported. |
|---------------+--------------------------------------------|
| Q3 | No result codes will be reported. |
|---------------+--------------------------------------------|
| Q4 | All remote result codes will be reported; |
| | local result codes will only be reported |
| | if an ATD or ATA command was entered. |
| | Modem does not report the RING result code |
| | in any mode. |
|---------------+--------------------------------------------|
| Q5 | Local result codes will only be reported |
| | if an ATD or ATA command was entered. |
| | Modem does not report the RING result code |
| | in any mode. |
|---------------+--------------------------------------------|
| Q6 | All remote result codes will be reported; |
| | modem will not report basic result codes |
| | when in answer mode. Modem does not report |
| | the RING result code in any mode. |
|---------------+--------------------------------------------|
| Q7 | Modem will not report remote result codes. |
| | Modem will not report local basic result |
| | codes when in answer mode. Modem does not |
| | report the RING result code in any mode. |
|---------------+--------------------------------------------|
| Q8 | All remote result codes will be reported; |
| | local result codes will only be reported |
| | if the local modem Is originating. |
|---------------+--------------------------------------------|
| Q9 | Local result codes will only be reported |
| | if the local modem Is originating. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Xn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables dial tone detection and selects |
| | which result codes the computer will |
| | return. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| X0 | Busy and dial tone detection disabled; |
| | basic result codes only enabled. |
|--------------+---------------------------------------------|
| í X1 | Busy and dial tone detection enabled; all |
| | standard result codes enabled. |
|--------------+---------------------------------------------|
| X2 | Busy and dial tone detection enabled; all |
| | standard and MNP result codes enabled. |
|--------------+---------------------------------------------|
| X10 | Busy and dial tone detection disabled; |
| | basic result codes only enabled. |
|--------------+---------------------------------------------|
| X11 | Busy and dial tone detection disabled; |
| | basic result codes with connect speed |
| | enabled. |
|--------------+---------------------------------------------|
| X12 | Busy tone detection disabled, dial tone |
| | detection enabled; basic result codes with |
| | connect speed enabled. |
|--------------+---------------------------------------------|
| X13 | Busy tone detection enabled, dial tone |
| | detection disabled; basic result codes with |
| | connect speed enabled. |
|--------------+---------------------------------------------|
| X14 | Busy and dial tone detection enabled; basic |
| | result codes with connect speed enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RETRAIN |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &R [cmds] |
|--------------+---------------------------------------------|
| Description: | Initiates a retrain. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEAKER VOLUME |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S61=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 150 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | N/A |
|--------------+---------------------------------------------|
| Description: | Sets the volume of the speaker to the |
| | number specified. Larger numbers indicate |
| | higher volume. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEED NEGOTIATION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S94=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets how the modem will negotiate the |
| | connection speed in regards to the S50 |
| | register. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S94=0 | Modem will connect only at speed set by |
| | S50. |
|---------------+--------------------------------------------|
| í S94=1 | Modem will connect at any speed up to and |
| | including the speed set by S50. |
|---------------+--------------------------------------------|
| S94=2 | Modem will connect at any speed supported |
| | by the data modulation set by S50. |
|---------------+--------------------------------------------|
| S94=3 | Modem will connect at the speed set by S50 |
| | and, if possible, fall back to the next |
| | lowest speed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SOFT RESET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Zn [cmds] |
|--------------+---------------------------------------------|
| Description: | Resets modem and command settings to the |
| | profile specified. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í Z0 | Restore profile specified by S255. |
|--------------+---------------------------------------------|
| Z1 | Restore profile 0. |
|--------------+---------------------------------------------|
| Z2 | Restore profile 1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SOFT RESET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &En [cmds] |
|--------------+---------------------------------------------|
| Description: | Resets modem and command settings to the |
| | profile specified. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &E0 | Restore profile specified by S255. |
|--------------+---------------------------------------------|
| &E1 | Restore profile 0. |
|--------------+---------------------------------------------|
| &E2 | Restore profile 1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STORE CONFIGURATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Wn [cmds] |
|--------------+---------------------------------------------|
| Description: | Stores the current configuration to the |
| | specified profile in non-volatile RAM. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &W0 | Store to profile specified by S255. |
|--------------+---------------------------------------------|
| &W1 | Store to profile 0. |
|--------------+---------------------------------------------|
| &W2 | Store to profile 1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STORE TELEPHONE NUMBER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Nn=<#>\xxxx\ [cmds] |
|--------------+---------------------------------------------|
| Description: | Stores the indicated telephone number at |
| | memory location n. The string xxxx between |
| | the backslashes sets an optional name for |
| | that stored number. |
|--------------+---------------------------------------------|
| Note: | If additional commands are to be given |
| | after this command, the backslashes must be |
| | used even if there is no string between |
| | them. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TALK/DATA SWITCH |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S105=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the operation of SW2. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S105=0 | Talk/Data switch disabled. |
|---------------+--------------------------------------------|
| í S105=1 | Talk/Data switch enabled. |
|---------------+--------------------------------------------|
| S105=2 | Talk/Data switch enabled when modem is on |
| | hook. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER PROFILE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S255=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets which user profile will be used as the |
| | default. |
|------------------------------------------------------------|
| Command | Function |
|-----------------+------------------------------------------|
| S255=0 | Default profile set by SW3. |
|-----------------+------------------------------------------|
| S255=1 | Modem will load profile 0 by default. |
| | Auto-dial functions use first stored |
| | number. |
|-----------------+------------------------------------------|
| S255=2 | Modem will load profile 1 by default. |
| | Auto-dial functions use second stored |
| | number. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.32 ANSWER MODE TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S93=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 8 |
|--------------+---------------------------------------------|
| Range: | 3 - 255 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sets the amount of time that, when in |
| | answer mode, the modem will wait for a V.32 |
| | originate sequence before dropping down to |
| | the next slowest protocol. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VOICE MODE |
|------------------------------------------------------------|
| Type: | Immdeiate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] G [cmds] |
|--------------+---------------------------------------------|
| Description: | Commands the modem to break the data |
| | connection and go on-hook so that the line |
| | may be used for voice mode. If the |
| | telephone’s handset is picked up, the call |
| | will not be disconnected. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XOFF REISSUE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S65=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem will reissue XOFF |
| | characters if the DTE continues to transmit |
| | after an XOFF. |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| í S65=0 | Modem will not reissue XOFF characters. |
|----------------+-------------------------------------------|
| S65=1 | Modem will reissue XOFF characters. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| XON HANDLING |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S69=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets how the modem processes XON characters |
| | coming from the DTE. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í S69=0 | XON character is trapped by modem. |
|---------------+--------------------------------------------|
| S69=1 | XON character is passed to remote modem. |
|---------------+--------------------------------------------|
| S69=2 | XON character trapped by modem if it is in |
| | XOFF state; otherwise, it is passed to |
| | remote modem. |
+------------------------------------------------------------+