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# 3COM CORPORATION
COURIER 2400E/PS
Card Type Modem (Asynchronous)
Chip Set U.S. Robotics
Maximum Data Rate 2400bps
Data Bus Unidentified
Data Modulation Protocol Unidentified
54152
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 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 |
|--------------+---------------------------------------------|
| B0 | ITU-T answer sequence enabled |
|--------------+---------------------------------------------|
| í B1 | Bell answer sequence 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: | 0-222 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls auto-answer, result code pause, |
| | DTR dialing, reset dialing, MNP3 and |
| | hardware reset. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | Not used |
|------+-------+---------------------------------------------|
| 1 | í 0 | Auto-answer mode disabled |
| | | |
| | 1 | Auto-answer mode on originate enabled |
|------+-------+---------------------------------------------|
| 2 | í 0 | Result code pause enabled |
| | | |
| | 1 | Result code pause disabled |
|------+-------+---------------------------------------------|
| 3 | í 0 | DTR dialing disabled |
| | | |
| | 1 | DTR dialing enabled |
|------+-------+---------------------------------------------|
| 4 | í 0 | Reset dialing disabled |
| | | |
| | 1 | Reset dialing enabled, dials number at |
| | | position 0 in NVRAM. |
|------+-------+---------------------------------------------|
| 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: | 0-81 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls escape sequence, MNP4, and MNP |
| | compliance. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | Normal operation |
| | | |
| | 1 | Hang up on receiving +++ |
|------+-------+---------------------------------------------|
| 1 - | í 000 | Not used |
| 3 | | |
|------+-------+---------------------------------------------|
| 4 | í 0 | MNP 4 enabled |
| | | |
| | 1 | MNP 4 disabled |
|------+-------+---------------------------------------------|
| 5 | í 0 | Not used |
|------+-------+---------------------------------------------|
| 6 | í 0 | MNP normal |
| | | |
| | 1 | MNP adjusted for non compliant modems |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Yn [cmds] |
|--------------+---------------------------------------------|
| Description: | Configures action of break signal |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &Y0 | Empty buffer only |
|--------------+---------------------------------------------|
| í &Y1 | Empties buffer and break is sent |
| | immediately |
|--------------+---------------------------------------------|
| &Y2 | Do not empty buffer and break is sent |
| | immediately |
|--------------+---------------------------------------------|
| &Y3 | Do not empty buffer or send break |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CARRIER DETECT (CD) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the CD signal |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &C0 | Modem does not respond to CD signal |
|--------------+---------------------------------------------|
| í &C1 | CD signal normal |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CARRIER FAILURE CODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S20=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Reports codes which correspond to the |
| | possible causes of NO CARRIER |
|------------------------------------------------------------|
| Value | Meaning |
|---------------+--------------------------------------------|
| 0 | Ant key abort |
|---------------+--------------------------------------------|
| 1 | DTR dropped |
|---------------+--------------------------------------------|
| 2 | Escape sequence |
|---------------+--------------------------------------------|
| 3 | Loss of carrier |
|---------------+--------------------------------------------|
| 4 | Inactivity time-out |
|---------------+--------------------------------------------|
| 5 | ARQ connection not established, hang-up. |
|---------------+--------------------------------------------|
| 6 | ARQ retry time-out |
|---------------+--------------------------------------------|
| 7 | Receive link disconnect |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &K0 | Data compression disabled |
|--------------+---------------------------------------------|
| í &K1 | Auto enabled/disable data compression |
|--------------+---------------------------------------------|
| &K2 | Data compression enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECTION FAILURE CODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S17=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Description: | Reports codes which correspond to the |
| | possible causes of a connection failure |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECTION SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets connection speed, modem will hang up |
| | if it cannot connect. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &N0 | Normal link |
|--------------+---------------------------------------------|
| &N1 | 300bps |
|--------------+---------------------------------------------|
| &N2 | 1200bps |
|--------------+---------------------------------------------|
| &N3 | 2400bps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA TERMINAL READY (DTR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Dn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects modem response to DTR |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &D0 | Modem does not respond to DTR |
|--------------+---------------------------------------------|
| &D1 | Modem goes to command mode after DTR |
| | toggles |
|--------------+---------------------------------------------|
| &D2 | Modem is initialized after DTR goes off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 to a maximum |
| | amount of time specified in S8 register |
|--------------+---------------------------------------------|
| ; | Modem returned to command state after |
| | dialing. Can only be placed at the end of |
| | the dial command. |
|--------------+---------------------------------------------|
| " | Dials letters that follow, ATDT"GOMICRO |
|--------------+---------------------------------------------|
| ! | Flash function initiated |
|--------------+---------------------------------------------|
| W | Dialing resumed following dial tone |
| | detection |
|--------------+---------------------------------------------|
| @ | Wait for quiet answer, then proceeds 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECHO |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] En [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls echo function; display keyboard |
| | commands when enabled. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| E0 | Echo function disabled |
|--------------+---------------------------------------------|
| í E1 | Echo function enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECHO - ON-LINE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Fn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects whether commands sent while in data |
| | mode are echoed |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| F0 | Local echo enabled |
|--------------+---------------------------------------------|
| í F1 | Local echo disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION MODE (ARQ) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects active error correction protocols |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &M0 | Normal mode only enabled |
|--------------+---------------------------------------------|
| í &M4 | Normal/ARQ mode enabled |
|--------------+---------------------------------------------|
| &M5 | ARQ mode only enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY DEFAULT PROFILE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &F [cmds] |
|--------------+---------------------------------------------|
| Description: | Load default profile in NVRAM |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | Flow control disabled |
|--------------+---------------------------------------------|
| &I1 | XON/XOFF passthrough enabled |
|--------------+---------------------------------------------|
| &I2 | XON/XOFF passthrough disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|--------------+---------------------------------------------|
| í &R1 | Modem ignores RTS |
|--------------+---------------------------------------------|
| &R2 | Received data to DTE when RTS is on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|--------------+---------------------------------------------|
| í H0 | Modem commanded to go on-hook (hang-up) |
|--------------+---------------------------------------------|
| H1 | Modem commanded to go off-hook (pick-up) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S19=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-90 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects; S19=0 will disable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| JACK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Jn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects jack type |
|--------------+---------------------------------------------|
| Command | Jack Type |
|--------------+---------------------------------------------|
| í &J0 | RJ-11C |
|--------------+---------------------------------------------|
| &J1 | RJ-12, RJ-13 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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: | Return to on-line command (data |
| | transmission) mode |
|------------------------------------------------------------|
| Note: The O command must be placed at the end of the |
| command string. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|--------------+---------------------------------------------|
| í &P0 | 39/61ms at 10pps (North America) |
|--------------+---------------------------------------------|
| &P1 | 33/67ms at 10pps (Europe) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPEAT COMMAND STRING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] > [cmds] |
|--------------+---------------------------------------------|
| Description: | Causes modem to repeat command string until |
| | a keyboard key is pressed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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>. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 call duration |
|--------------+---------------------------------------------|
| I4 | Reports current command settings |
|--------------+---------------------------------------------|
| I5 | Reports NVRAM settings |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables modem to send result codes to the |
| | DTE |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í 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 |
|--------------+---------------------------------------------|
| í 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 and 10 enabled |
|--------------+---------------------------------------------|
| X2 | Busy tone detection disabled, dial tone |
| | detection enabled; result codes 0-6 and 10 |
| | enabled; also adaptive dialing, and fast |
| | dialing enabled. |
|--------------+---------------------------------------------|
| X3 | Busy tone detection enabled, dial tone |
| | detection disabled; result codes 0-5, 7-10 |
| | 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 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, 7-12 |
| | enabled; also adaptive dialing, wait for |
| | second dial tone, and wait for answer |
| | enabled. |
|--------------+---------------------------------------------|
| X6 | Busy and dial tone detection enabled; |
| | result codes 0-10 enabled; also adaptive |
| | dialing, wait for second dial tone, wait |
| | for answer, and fast dialing enabled. |
|------------------------------------------------------------|
| Note: Valid numeric result codes; 0-8, and 10-12. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT SPEED |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] &Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum allowable data exchange |
| | rate from the local computer and modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &B0 | Speed of last AT command |
|--------------+---------------------------------------------|
| &B1 | 300bps |
|--------------+---------------------------------------------|
| &B2 | 600bps |
|--------------+---------------------------------------------|
| &B3 | 1200bps |
|--------------+---------------------------------------------|
| &B4 | 2400bps |
|--------------+---------------------------------------------|
| &B5 | 4800bps |
|--------------+---------------------------------------------|
| &B6 | 9600bps |
|--------------+---------------------------------------------|
| &B7 | 19.2Kbps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SOFT RESET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Z [cmds] |
|--------------+---------------------------------------------|
| Description: | Resets modem to profiles saved in |
| | non-volatile RAM |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STORE ACTIVE PROFILE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &W [cmds] |
|--------------+---------------------------------------------|
| Description: | Writes current values to non-volatile RAM |
| | templates |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STORE TELEPHONE NUMBER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Zn=(phone # & modifiers) |
|--------------+---------------------------------------------|
| Description: | Writes selected telephone numbers into the |
| | non-volatile memory at location n |
|------------------------------------------------------------|
| Note: The characters described in the D command are |
| valid for use in the &Z command. |
|------------------------------------------------------------|
| Command | Function |
|----------------+-------------------------------------------|
| &Zn? | Displays phone number from non-volatile |
| | memory at location n |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S16=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls tests. Analog loopback, dial, and |
| | self tests (test pattern). |
|------------------------------------------------------------|
| Command | Function |
|-----------------+------------------------------------------|
| í S16=0 | Testing disabled |
|-----------------+------------------------------------------|
| S16=1 | Local analog loopback enabled |
|-----------------+------------------------------------------|
| S16=2 | Dial test enabled |
|-----------------+------------------------------------------|
| S16=4 | Test pattern enabled |
|-----------------+------------------------------------------|
| S16=5 | Local analog loopback and test pattern |
| | 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. |