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# U. S. ROBOTICS, INC.
COURIER V.32
Card Type Modem (synchronous/asynchronous)
Chip Set Unidentified
Maximum Data Rate 9600bps
Data Bus External
Data Modulation Protocol Bell 103/212A
ITU-T V.21, V.22, V.22bis, V.32
Error Correction/Compression MNP5
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Power switch | SW1 | Line out | CN3 |
|------------------------------+---------+------------+------|
| DC power | CN1 | RS-232/422 | CN4 |
|------------------------------+---------+------------+------|
| Line in | CN2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|----------------------------------------+--------+----------|
| í DTR forced high | SW2/1 | On |
|----------------------------------------+--------+----------|
| DTR normal | SW2/1 | Off |
|----------------------------------------+--------+----------|
| í Verbose result codes | SW2/2 | Off |
|----------------------------------------+--------+----------|
| Numeric result codes | SW2/2 | On |
|----------------------------------------+--------+----------|
| í Result code display enabled | SW2/3 | On |
|----------------------------------------+--------+----------|
| Result code display disabled | SW2/3 | Off |
|----------------------------------------+--------+----------|
| í Local echo enabled | SW2/4 | Off |
|----------------------------------------+--------+----------|
| Local echo disabled | SW2/4 | On |
|----------------------------------------+--------+----------|
| í Auto answer disabled | SW2/5 | On |
|----------------------------------------+--------+----------|
| Auto answer enabled | SW2/5 | Off |
|----------------------------------------+--------+----------|
| í CD signal normal | SW2/6 | Off |
|----------------------------------------+--------+----------|
| CD forced high | SW2/6 | On |
|----------------------------------------+--------+----------|
| í Result codes displayed during | SW2/7 | Off |
| originate and answer modes | | |
|----------------------------------------+--------+----------|
| Result codes not displayed during | SW2/7 | On |
| answer mode when SW1/3 is On | | |
|----------------------------------------+--------+----------|
| í Smart mode | SW2/8 | On |
|----------------------------------------+--------+----------|
| Dumb mode | SW2/8 | Off |
|----------------------------------------+--------+----------|
| í Modem goes on-hook, command mode | SW2/9 | On |
| enabled, ‘OK’ reported | | |
|----------------------------------------+--------+----------|
| Modem remains off-hook, command mode | SW2/9 | Off |
| enabled, ‘NO CARRIER’ reported | | |
|----------------------------------------+--------+----------|
| í Load configuration from NVRAM | SW2/10 | Off |
|----------------------------------------+--------+----------|
| Load configuration from ROM | SW2/10 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTE/DCE MODE SELECTION |
|------------------------------------------------------------|
| Setting | SW3/1 | SW3/2 | SW3/3 | SW3/4 |
|------------+-----------+-----------+-----------+-----------|
| DCE mode | Off | Off | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| DTE mode | On | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+-------+----------+-----------------------------------|
| HS | Red | On | Modem is operating at 2400bps or |
| | | | faster |
|-----+-------+----------+-----------------------------------|
| HS | Red | Off | Modem is operating at slower than |
| | | | 2400bps |
|-----+-------+----------+-----------------------------------|
| AA | Red | On | Auto-answer enabled |
|-----+-------+----------+-----------------------------------|
| AA | Red | Off | Auto-answer disabled |
|-----+-------+----------+-----------------------------------|
| CD | Red | On | Carrier signal detected or when |
| | | | SW2/6 is on |
|-----+-------+----------+-----------------------------------|
| CD | Red | Off | Carrier signal not detected |
|-----+-------+----------+-----------------------------------|
| OH | Red | On | Modem is off-hook |
|-----+-------+----------+-----------------------------------|
| OH | Red | Off | Modem is on-hook |
|-----+-------+----------+-----------------------------------|
| RD | Red | Blinking | Modem is receiving data |
|-----+-------+----------+-----------------------------------|
| RD | Red | Off | Modem is not receiving data |
|-----+-------+----------+-----------------------------------|
| SD | Red | Blinking | Modem is transmitting data |
|-----+-------+----------+-----------------------------------|
| SD | Red | Off | Modem is not transmitting data |
|-----+-------+----------+-----------------------------------|
| MR | Red | On | Power is on |
|-----+-------+----------+-----------------------------------|
| MR | Red | Off | Power is off |
|-----+-------+----------+-----------------------------------|
| MR | Red | Blinking | During test mode, retraining, |
| | | | including online fallback |
|-----+-------+----------+-----------------------------------|
| RS | Red | On | RTS signal is high |
|-----+-------+----------+-----------------------------------|
| RS | Red | Off | RTS signal is low |
|-----+-------+----------+-----------------------------------|
| CS | Red | On | CTS signal is high and during |
| | | | synchronous mode |
|-----+-------+----------+-----------------------------------|
| CS | Red | Off | CTS signal is low, synchronous |
| | | | mode disabled |
|-----+-------+----------+-----------------------------------|
| ARQ | Red | On | Error correction enabled |
|-----+-------+----------+-----------------------------------|
| ARQ | Red | Off | Error correction disabled |
|-----+-------+----------+-----------------------------------|
| ARQ | Red | Blinking | Error correction activated |
|-----+-------+----------+-----------------------------------|
| SYN | Red | On | AT&M3 is set or AT&M1 and |
| | | | synchronous mode is set |
|-----+-------+----------+-----------------------------------|
| SYN | Red | Off | Modem not in synchronous mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| AT, ‘+++’, A/ |
|------------------------------------------------------------|
| A, E, F, H, M, O, P, Q, S, T, V, X |
|------------------------------------------------------------|
| &F, &G, &J, &P, &W, &X, &Z |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S26 |
|------------------------------------------------------------|
| Note: See MHI Help file for full command documentation. |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| ABORT |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | <any key> |
|--------------+---------------------------------------------|
| Description: | Aborts current command issued; dial, repeat |
| | mode (>), and repeat command (A>) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S13 |
|------------------------------------------------------------|
| Format | AT [cmds] S13=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls DTR reset, DTR dialing, reset |
| | dialing, and MNP3. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | DTR normal |
| | | |
| | 1 | Reset on low DTR |
|------+-------+---------------------------------------------|
| 1 | í 0 | Normal auto answer operation |
| | | |
| | 1 | When ring is received, enter originate and |
| | | listen for answer tone |
|------+-------+---------------------------------------------|
| 2 | í 0 | Pause 250msec. Before displaying result |
| | | codes |
| | 1 | |
| | | Immediate result code display |
|------+-------+---------------------------------------------|
| 3 | í 0 | DTR dialing disabled |
| | | |
| | 1 | DTR dialing enabled |
|------+-------+---------------------------------------------|
| 4 | í 0 | Reset dialing disabled |
| | | |
| | 1 | Reset dialing enabled |
|------+-------+---------------------------------------------|
| 5 | í 0 | Not used |
|------+-------+---------------------------------------------|
| 6 | í 0 | MNP 3 enabled |
| | | |
| | 1 | MNP 3 disabled |
|------+-------+---------------------------------------------|
| 7 | í 0 | Hardware reset disabled |
| | | |
| | 1 | Hardware reset enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S15 |
|------------------------------------------------------------|
| Format: | AT [cmds] S15=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls HST high frequency equalization, |
| | online fallback, back channel, |
| | non-error-correcting mode buffer, MNP4, and |
| | BS/DEL switch, MNP compliance, and |
| | Interbridge network compatibility. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | HST high frequency equalization enabled |
| | | |
| | 1 | HST high frequency equalization disabled |
|------+-------+---------------------------------------------|
| 1 | í 0 | Online fallback enabled |
| | | |
| | 1 | Online fallback disabled |
|------+-------+---------------------------------------------|
| 2 | í 0 | 450bps back channel enabled |
| | | |
| | 1 | 450bps back channel disabled |
|------+-------+---------------------------------------------|
| 3 | í 0 | Non-error-correcting mode transmit buffer |
| | | set to 1.5KB |
| | 1 | |
| | | Non-error-correcting mode transmit buffer |
| | | set to 128 bytes |
|------+-------+---------------------------------------------|
| 4 | í 0 | MNP 4 enabled |
| | | |
| | 1 | MNP 4 disabled |
|------+-------+---------------------------------------------|
| 5 | í 0 | Use backspace key for delete disabled |
| | | |
| | 1 | Use backspace key for delete enabled (May |
| | | cause software incompatibility) |
|------+-------+---------------------------------------------|
| 6 | í 0 | MNP normal |
| | | |
| | 1 | MNP adjusted for non compliant modems |
|------+-------+---------------------------------------------|
| 7 | í 0 | Interbridge network compatibility disabled |
| | | |
| | 1 | Interbridge network compatibility enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK LENGTH |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S21=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 10 |
|--------------+---------------------------------------------|
| Range: | Unidentified |
|--------------+---------------------------------------------|
| Unit: | 10 ms |
|--------------+---------------------------------------------|
| Description: | Sets the length of error control mode |
| | breaks sent from DCE to DTE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Yn [cmds] |
|--------------+---------------------------------------------|
| Description: | Configures action of break signal |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &Y0 | Break empties buffer |
|--------------+---------------------------------------------|
| í &Y1 | Break empties buffer and is sent |
| | immediately |
|--------------+---------------------------------------------|
| &Y2 | Break does not empty buffer and is sent |
| | immediately |
|--------------+---------------------------------------------|
| &Y3 | Send break with transmitted data |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls data compression |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| &K0 | Data compression disabled |
|---------------+--------------------------------------------|
| í &K1 | Auto enable/disabled data compression |
|---------------+--------------------------------------------|
| &K2 | Data compression enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECTION SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets required connection speed |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &N0 | Variable |
|--------------+---------------------------------------------|
| &N1 | 300bps |
|--------------+---------------------------------------------|
| &N2 | 1200bps |
|--------------+---------------------------------------------|
| &N3 | 2400bps |
|--------------+---------------------------------------------|
| &N4 | 4800bps |
|--------------+---------------------------------------------|
| &N5 | 7200bps |
|--------------+---------------------------------------------|
| &N6 | 9600bps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA SET READY (DSR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Sn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects DSR options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &S0 | DSR forced high |
|--------------+---------------------------------------------|
| &S1 | DSR high only while modem is connected |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#> [cmds] |
|--------------+---------------------------------------------|
| Example: | ATDT 443-3388,,,1111; |
|--------------+---------------------------------------------|
| Description: | Dials telephone number 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 |
|--------------+---------------------------------------------|
| í P | Pulse dialing enabled |
|--------------+---------------------------------------------|
| T | Tone dialing enabled |
|--------------+---------------------------------------------|
| , | Dialing paused for 2 seconds |
|--------------+---------------------------------------------|
| ; | Modem returned to command state after |
| | dialing. Can only be placed at the end of |
| | the dial command. |
|--------------+---------------------------------------------|
| ! | Flash function initiated |
|--------------+---------------------------------------------|
| / | Pause for 125ms then proceed with dial |
| | string |
|--------------+---------------------------------------------|
| @ | Dial, wait for quiet answer, then continue |
| | to execute the rest of the dial string |
|--------------+---------------------------------------------|
| W | Dial, wait for second dial tone, then |
| | continue to execute the rest of the dial |
| | string |
|--------------+---------------------------------------------|
| R | Answer mode enabled, originate mode |
| | disabled following handshake initiation |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL - STORED NUMBER |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] DSn [cmds] |
|--------------+---------------------------------------------|
| Description: | Dial stored number from memory location n |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISCONNECT BUFFER DELAY |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S38=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | Unidentified |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Sets maximum duration allowed during |
| | buffered data calls for modem to perform |
| | clearing functions after losing |
| | carrier-signal or receiving a clear call |
| | signal from the remote modem and before |
| | initiating hang-up process. A value of 0 |
| | will allow the modem to hanging-up after |
| | DTR drops. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DSR TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S24=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-25 |
|--------------+---------------------------------------------|
| Unit: | .01 second |
|--------------+---------------------------------------------|
| Description: | Sets the delay between DSR pulses, when &S1 |
| | is set |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects active error correction protocols |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &M0 | Normal mode only |
|--------------+---------------------------------------------|
| &M3 | Continuos synchronous mode |
|--------------+---------------------------------------------|
| í &M4 | Auto-detect mode |
|--------------+---------------------------------------------|
| &M5 | ARQ mode only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &An [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects extended result codes |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &A0 | /ARQ result codes disabled |
|--------------+---------------------------------------------|
| í &A1 | /ARQ result codes enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL CHARACTER - XOFF |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S23=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 19 |
|--------------+---------------------------------------------|
| Range: | 11-127 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets the character used to represent XOFF |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL CHARACTER - XON |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S22=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 17 |
|--------------+---------------------------------------------|
| Range: | 11-127 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets the character used to represent XON |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Hn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by modem |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &H0 | Flow control disabled |
|--------------+---------------------------------------------|
| &H1 | CTS/RTS flow control enabled |
|--------------+---------------------------------------------|
| &H2 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| &H3 | CTS/RTS and XON/XOFF flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Rn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls receive data hardware flow control |
| | and RTS signals |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &R0 | Delay RTS signal before sending CTS signal |
|--------------+---------------------------------------------|
| í &R1 | Modem ignores RTS |
|--------------+---------------------------------------------|
| &R2 | Received data to DTE when RTS is on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL PASS-THROUGH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &In [cmds] |
|--------------+---------------------------------------------|
| Description: | Allows modem to act on and then transmit |
| | XON/XOFF characters |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &I0 | Software flow control disabled |
|--------------+---------------------------------------------|
| &I1 | XON/XOFF pass-through enabled |
|--------------+---------------------------------------------|
| &I2 | XON/XOFF pass-through disabled |
|--------------+---------------------------------------------|
| &I3 | Host mode enabled, Hewlett Packard protocol |
|--------------+---------------------------------------------|
| &I4 | Terminal mode enabled, Hewlett Packard |
| | protocol |
|--------------+---------------------------------------------|
| &I5 | XON/XOFF to remote for non-ARQ link flow |
| | control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HELP SCREENS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT <prefix>$ |
|--------------+---------------------------------------------|
| Description: | Shows command help screens for all commands |
| | beginning with the given prefix, or no |
| | prefix if none is given. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| $ | Shows command summary help screen |
|--------------+---------------------------------------------|
| &$ | Shows extended command summary help screen |
|--------------+---------------------------------------------|
| D$ | Shows dial command summary help screen |
|--------------+---------------------------------------------|
| S$ | Shows S-register summary help screen |
|--------------+---------------------------------------------|
| <CTRL>-S | Stop/restart display of help screen |
|--------------+---------------------------------------------|
| <CTRL>-C | Cancel display of help screen |
|--------------+---------------------------------------------|
| <CTRL>-K | Cancel display of help screen |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S19=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | Unidentified |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LEASED LINE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls lease line operation |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| í &L0 | lease line operation disabled |
|----------------+-------------------------------------------|
| &L1 | lease line operation enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LOCK SERIAL PORT |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets operation of serial port speed |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &B0 | Serial speed follows connect speed |
|--------------+---------------------------------------------|
| &B1 | Serial speed locked |
|--------------+---------------------------------------------|
| &B2 | Serial speed locked in ARQ mode only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MODULATION SELECTION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S27=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the modulation for 300bps |
| | transmission |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S27=0 | Bell103 only |
|---------------+--------------------------------------------|
| S27=1 | ITU-T V.21, all calls answered in either |
| | Bell103 or V.21, originate calls in V.21 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PAUSE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] / [cmds] |
|--------------+---------------------------------------------|
| Description: | Command string execution is paused for |
| | 125ms |
|--------------+---------------------------------------------|
| Note: | Multiple slashed can be used consecutively |
| | to add up to the duration of delay desired. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPEAT COMMAND CONTINUALLY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] > [cmds] |
|--------------+---------------------------------------------|
| Description: | Causes modem to repeat command continually |
| | until <any key> is pressed |
|--------------+---------------------------------------------|
| Note: | If used in the dial string, 10 attempts |
| | will be made. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPEAT COMMAND STRING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] A> [cmds] |
|--------------+---------------------------------------------|
| Description: | Causes modem to repeat continually last |
| | issued command until <any key> is pressed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays modem properties |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum result |
|--------------+---------------------------------------------|
| I2 | Reports RAM checksum result |
|--------------+---------------------------------------------|
| I3 | Reports current call time or clock time |
|--------------+---------------------------------------------|
| I4 | Reports current command settings |
|--------------+---------------------------------------------|
| I5 | Reports current NVRAM settings |
|--------------+---------------------------------------------|
| I6 | Reports current connection’s statistics |
|--------------+---------------------------------------------|
| I7 | Reports product configuration |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S16=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects modem test modes |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S16=0 | Test mode disabled |
|--------------+---------------------------------------------|
| S16=1 | Analog loopback test enabled |
|--------------+---------------------------------------------|
| S16=2 | Dial test enabled |
|--------------+---------------------------------------------|
| S16=4 | Test pattern enabled |
|--------------+---------------------------------------------|
| S16=5 | Analog loopback test with test pattern |
| | enabled |
|--------------+---------------------------------------------|
| S16=8 | Remote digital loopback enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TIME DISPLAY |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the current call time or clock |
| | time |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í K0 | Display length of last call |
|--------------+---------------------------------------------|
| K1 | Display actual time |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMITTER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the transmitter |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| C0 | Transmitter disabled, receive only mode |
|----------------+-------------------------------------------|
| í C1 | Transmitter enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.32 - HANDSHAKE TIME |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S28=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 8 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sets length of V.32 handshake |
+------------------------------------------------------------+