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# U.S. ROBOTICS, INC.
COURIER V.32/PC
Card Type Modem (asynchronous)
Chip Set U.S. Robotics
Maximum Data Rate 14.4Kbps
Data Bus Unidentified
Data Modulation Protocol Unidentified
Error Correction/Compression Unidentified
V1985
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|----------------------------------------+--------+----------|
| í DTR normal | SW1/1 | Off |
|----------------------------------------+--------+----------|
| DTR forced high | SW1/1 | On |
|----------------------------------------+--------+----------|
| í Verbal result codes | SW1/2 | Off |
|----------------------------------------+--------+----------|
| Numeric result codes | SW1/2 | On |
|----------------------------------------+--------+----------|
| í Enable result codes displayed | SW1/3 | On |
|----------------------------------------+--------+----------|
| Disable result codes displayed | SW1/3 | Off |
|----------------------------------------+--------+----------|
| í Local echo enabled | SW1/4 | Off |
|----------------------------------------+--------+----------|
| Local echo disabled | SW1/4 | On |
|----------------------------------------+--------+----------|
| í Auto answer disabled | SW1/5 | On |
|----------------------------------------+--------+----------|
| Auto answer enabled | SW1/5 | Off |
|----------------------------------------+--------+----------|
| í CD signal normal | SW1/6 | Off |
|----------------------------------------+--------+----------|
| CD signal forced high | SW1/6 | On |
|----------------------------------------+--------+----------|
| í Display result codes in originate | SW1/7 | Off |
| and answer mode | | |
|----------------------------------------+--------+----------|
| Display result codes in originate mode | SW1/7 | On |
| only | | |
|----------------------------------------+--------+----------|
| í Smart mode enabled | SW1/8 | On |
|----------------------------------------+--------+----------|
| Dumb mode enabled | SW1/8 | Off |
|----------------------------------------+--------+----------|
| í Normal operation enabled | SW1/9 | On |
|----------------------------------------+--------+----------|
| Escape sequence enabled | SW1/9 | Off |
|----------------------------------------+--------+----------|
| í Restore NVRAM defaults | SW1/10 | Off |
|----------------------------------------+--------+----------|
| Restore factory defaults | SW1/10 | On |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| ABORT |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | Any key |
|--------------+---------------------------------------------|
| Description: | Aborts answering/originating a call; modem |
| | hangs up. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ANSWER |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] A |
|--------------+---------------------------------------------|
| Description: | Enables manual answer mode, the modem goes |
| | off-hook; pressing any key will abort. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ANSWER SEQUENCE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the answer sequence the modem will |
| | use |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í B0 | V.32 mode/ITU-T answer sequence enabled |
|--------------+---------------------------------------------|
| B1 | HST mode/Bell answer tone enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ATTENTION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] |
|--------------+---------------------------------------------|
| Description: | Tells the modem that a command follows or |
| | use alone to test OK result code |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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, HST modulation, 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 | HST modulation enabled |
| | | |
| | 1 | HST modulation disabled |
|------+-------+---------------------------------------------|
| 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, |
| | custom applications and MNP compliance. |
|--------------+---------------------------------------------|
| 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 | 300bps back channel enabled |
| | | |
| | 1 | 300bps 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 | Custom applications only |
| | | |
| | 1 | Custom applications only |
|------+-------+---------------------------------------------|
| 6 | í 0 | MNP normal |
| | | |
| | 1 | MNP adjusted for non compliant modems |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S27 |
|------------------------------------------------------------|
| Format: | AT [cmds] S27=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-191 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls V.21, V.32 encoding and |
| | modulation, and high speed rate shift |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | V.21 disabled |
| | | |
| | 1 | V.21 enabled |
|------+-------+---------------------------------------------|
| 1 | í 0 | V.32 non-trellis coding disabled |
| | | |
| | 1 | V.32 non-trellis coding enabled |
|------+-------+---------------------------------------------|
| 2 | í 0 | V.32 modulation enabled |
| | | |
| | 1 | V.32 modulation disabled |
|------+-------+---------------------------------------------|
| 3 - | í 000 | Not used |
| 5 | | |
|------+-------+---------------------------------------------|
| 6 | í 0 | 19.2Kbps enabled. High speed rate shift |
| | | needs to be enabled. |
| | 1 | |
| | | 38.4Kbps enabled. High speed rate shift |
| | | needs to be enabled. |
|------+-------+---------------------------------------------|
| 7 | í 0 | High speed rate shift disabled |
| | | |
| | 1 | High speed rate shift enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK LENGTH |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S21=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 10 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | 10 ms |
|--------------+---------------------------------------------|
| Description: | Sets the length of error control mode |
| | breaks sent from DCE to DTE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CLOCK |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays connection duration or real time |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| í K0 | Connection duration displayed in ATI3 |
|---------------+--------------------------------------------|
| K1 | Real time displayed in ATI3. To set clock |
| | (military time) use ATI3=HH:MM:SSK1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA SET READY (DSR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Sn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects DSR options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &S0 | DSR forced high |
|--------------+---------------------------------------------|
| &S1 | DSR controlled by modem |
|--------------+---------------------------------------------|
| &S2 | DSR toggled, CTS follows CD |
|--------------+---------------------------------------------|
| &S3 | DSR toggled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
|--------------+---------------------------------------------|
| " | Dials letters as if they were numbers; |
| | ATDT"GOMICRO" |
|--------------+---------------------------------------------|
| ! | Flash function initiated |
|--------------+---------------------------------------------|
| @ | 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: | 0-255 |
|--------------+---------------------------------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DSR DELAY |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S24=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 25 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sets the length of the DSR pulse signal |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECHO |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] En [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls echo function; display keyboard |
| | commands when enabled. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| E0 | Echo function disabled |
|--------------+---------------------------------------------|
| E1 | Echo function enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECHO - ON-LINE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Fn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether data sent while in data |
| | mode are echoed |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| F0 | Local echo enabled |
|--------------+---------------------------------------------|
| í F1 | Local echo disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ESCAPE SEQUENCE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | +++AT [cmds] <CR> |
|--------------+---------------------------------------------|
| Description: | Initiates the escape sequence and returns |
| | the modem to the on-line command state if |
| | it receives three escape characters set in |
| | S2 within the time allotted by S12. |
|------------------------------------------------------------|
| Note: Do not precede this command with AT. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 CTS after RTS. See S26 on length of |
| | time. |
|--------------+---------------------------------------------|
| &R1 | Modem ignores RTS |
|--------------+---------------------------------------------|
| í &R2 | Received data to DTE when RTS is on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL PASSTHROUGH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &In [cmds] |
|--------------+---------------------------------------------|
| Description: | Allows modem to act on, then transmit |
| | XON/XOFF characters. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &I0 | Software flow control disabled |
|--------------+---------------------------------------------|
| &I1 | XON/XOFF passthrough enabled |
|--------------+---------------------------------------------|
| &I2 | XON/XOFF passthrough disabled |
|--------------+---------------------------------------------|
| &I3 | ENQ/ACK enabled in host mode |
|--------------+---------------------------------------------|
| &I4 | ENQ/ACK enabled in terminal mode |
|--------------+---------------------------------------------|
| &I5 | XON/XOFF passthrough disabled in error |
| | correction mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| GUARD TONE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Commands the modem to transmit a guard tone |
|------------------------------------------------------------|
| Note: Used primarily for international data |
| transmission |
|------------------------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &G0 | Guard tone disabled |
|--------------+---------------------------------------------|
| &G1 | 550Hz guard tone enabled |
|--------------+---------------------------------------------|
| &G2 | 1800Hz guard tone enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| HOOK CONTROL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Hn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether the modem is on-hook or |
| | off-hook |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| H0 | Modem commanded to go on-hook (hang-up) |
|--------------+---------------------------------------------|
| H1 | Modem commanded to go off-hook (pick-up) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LIST AMPERSAND COMMANDS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &$ [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays ampersand (&) commands |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LIST DIAL COMMANDS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D$ [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays dial commands |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LIST S-REGISTERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S$ [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the S-registers |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON-LINE |
|------------------------------------------------------------|
| Type: | Immediate |
|------------------+-----------------------------------------|
| Format: | AT [cmds] O [cmds] |
|------------------+-----------------------------------------|
| Description: | Returns to on-line command (data |
| | transmission) mode. |
|------------------------------------------------------------|
| Note: The O command must be placed at the end of the |
| command string. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON-LINE HELP |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $ [cmds] |
|--------------+---------------------------------------------|
| Description: | On-line help; displays basic command list. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PAUSE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] / (slash) [cmds] |
|--------------+---------------------------------------------|
| Description: | 125 msec delay before proceeding with dial |
| | string or command |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PULSE DIALING |
|------------------------------------------------------------|
| Type: | Configuration |
|----------------------+-------------------------------------|
| Format: | AT [cmds] P [cmds] |
|----------------------+-------------------------------------|
| Description: | Enables pulse dialing |
|------------------------------------------------------------|
| Note: This command can be duplicated with the P |
| modifier in the D (Dial) command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PULSE DIALING RATIO |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Pn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects pulse dial make/break ratio |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &P0 | 39/61ms at 10pps (North America) |
|--------------+---------------------------------------------|
| &P1 | 33/67ms at 10pps (Europe) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RECEIVE-ONLY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets receive-only; used if modem is |
| | attached to additional monitoring-only |
| | systems |
|------------------------------------------------------------|
| Command | Function |
|-----------------------+------------------------------------|
| C0 | Disables transmitter |
|-----------------------+------------------------------------|
| í C1 | Enables transmitter |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPEAT COMMAND STRING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] > [cmds] |
|--------------+---------------------------------------------|
| Example: | AT>DT5551212 or ATDT5551212> |
|--------------+---------------------------------------------|
| Description: | Causes modem to repeat command string until |
| | a keyboard key is pressed |
|------------------------------------------------------------|
| Note: If used before or after the ATD command, the |
| modem will redial the number until a connection is |
| established or a maximum of ten attempts is reached. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPEAT PREVIOUS COMMAND |
|------------------------------------------------------------|
| Type: | Immediate |
|---------------+--------------------------------------------|
| Format: | A/ |
|---------------+--------------------------------------------|
| Description: | Repeats previous command; mainly used for |
| | redial. |
|------------------------------------------------------------|
| Note: Do not precede this command with AT, or follow |
| it with <CR>. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RTS/CTS DELAY |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S26=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 1 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sets the length of time between RTS and CTS |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Reports RAM checksum |
|--------------+---------------------------------------------|
| I3 | Reports connection duration and real time |
|--------------+---------------------------------------------|
| I4 | Reports current command settings |
|--------------+---------------------------------------------|
| I5 | Reports NVRAM settings |
|--------------+---------------------------------------------|
| I6 | Reports link diagnostics |
|--------------+---------------------------------------------|
| I7 | Reports product configuration |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables modem to send result codes to the |
| | DTE |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| Q0 | Result code sending enabled |
|--------------+---------------------------------------------|
| Q1 | Result code sending disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODE FORMAT |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Vn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects word or numeric format for |
| | information-text and result codes |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| V0 | Numeric format enabled |
|--------------+---------------------------------------------|
| V1 | Verbose (word) format enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SELECT CALL PROGRESS RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Xn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables selection of tone detection and |
| | associated result code format options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| X0 | Busy and dial tone detection disabled; |
| | result codes 0-4 enabled. |
|--------------+---------------------------------------------|
| í X1 | Busy and dial tone detection disabled; |
| | result codes 0-5, 10, 13, and 18 enabled |
|--------------+---------------------------------------------|
| X2 | Busy tone detection disabled, dial tone |
| | detection enabled; result codes 0-6, 10, |
| | 13, and 18 enabled; also adaptive dialing, |
| | and fast dialing enabled. |
|--------------+---------------------------------------------|
| X3 | Busy tone detection enabled, dial tone |
| | detection disabled; result codes 0-5, 7-18 |
| | enabled; also adaptive dialing, wait for |
| | second dial tone, and wait for answer |
| | enabled. |
|--------------+---------------------------------------------|
| X4 | Busy and dial tone detection enabled; |
| | result codes 0-10, 13, and 18 enabled; also |
| | adaptive dialing, wait for second dial |
| | tone, wait for answer, and fast dialing |
| | enabled. |
|--------------+---------------------------------------------|
| X5 | Busy tone detection enabled, dial tone |
| | detection disabled; result codes 0-5, 7-18 |
| | enabled; also adaptive dialing, wait for |
| | second dial tone, and wait for answer |
| | enabled. |
|--------------+---------------------------------------------|
| X6 | Busy and dial tone detection enabled; |
| | result codes 0-18 enabled; also adaptive |
| | dialing, wait for second dial tone, wait |
| | for answer, and fast dialing enabled. |
|--------------+---------------------------------------------|
| X7 | Busy and dial tone detection enabled; |
| | result codes 0-11, 13, and 18 enabled; also |
| | adaptive dialing, wait for second dial |
| | tone, wait for answer, and fast dialing |
| | enabled. |
|------------------------------------------------------------|
| Note: Valid numeric result codes; 0-8, 10-13, and 18. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SOFT RESET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Z [cmds] |
|--------------+---------------------------------------------|
| Description: | Restores modem software default profile |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEAKER MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects various speaker options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| M0 | Speaker disabled |
|--------------+---------------------------------------------|
| í M1 | Speaker enabled until carrier signal |
| | detected |
|--------------+---------------------------------------------|
| M2 | Speaker enabled |
|--------------+---------------------------------------------|
| M3 | Speaker enabled following dialing, then |
| | disabled after carrier signal detected. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEAKER VOLUME |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls speaker volume |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| L0 | Low volume setting |
|--------------+---------------------------------------------|
| L1 | Low volume setting |
|--------------+---------------------------------------------|
| í L2 | Medium volume setting |
|--------------+---------------------------------------------|
| L3 | Highest volume setting |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STATUS-REGISTER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | Read: AT [cmds] Sn? [cmds] |
| | |
| | Write: AT [cmds] Sn=x [cmds] |
|--------------+---------------------------------------------|
| Description: | Writes to or reads from a specified |
| | register |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| Sn.b=x | Write to register bit b using values 0 |
| | (off) and 1 (on) for x |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S16=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls loopback tests, analog, digital, |
| | remote digital, and self tests. |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S16=0 | Testing disabled |
|---------------+--------------------------------------------|
| S16=1 | Local digital loopback enabled |
|---------------+--------------------------------------------|
| S16=2 | Dial test (Factory testing only) |
|---------------+--------------------------------------------|
| S16=4 | Test pattern enabled (transmitted on |
| | CONNECT, either on answering or originate) |
|---------------+--------------------------------------------|
| S16=5 | Local analog loopback and test pattern |
| | enabled |
|---------------+--------------------------------------------|
| S16=8 | Remote digital loopback enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TONE DIALING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------------+---------------------------------------|
| Format: | AT [cmds] T [cmds] |
|--------------------+---------------------------------------|
| Description: | Enables tone dialing mode |
|------------------------------------------------------------|
| Note: This command can be duplicated with the T |
| modifier in the D (Dial) command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |