3COM CORPORATION ================ COURIER HST Modem Type Data (synchronous/asynchronous) Maximum Data Rate 9600bps Data Bus External Data Modulation Protocol Bell 103A/212A ITU-T V.22bis USR HST Error Correction/Compression MNP5 +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Purpose | Location | Purpose | Location | |------------------+----------+-------------------+----------| | Line in | CN1 | DC power | CN4 | |------------------+----------+-------------------+----------| | Line out | CN2 | Power switch | SW2 | |------------------+----------+-------------------+----------| | RS-232/422 | CN3 | | | +------------------------------------------------------------+ +------------------------------------------------------------+ | DTR SIGNAL | |------------------------------------------------------------| | Setting | SW1/1 | |----------------------------+-------------------------------| |>> On | DTR forced high | |----------------------------+-------------------------------| | Off | DTR normal | +------------------------------------------------------------+ +------------------------------------------------------------+ | RESULT CODES | |------------------------------------------------------------| | Setting | SW1/2 | |----------------------------+-------------------------------| |>> Off | Verbal result codes enabled | |----------------------------+-------------------------------| | On | Numeric result codes enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | RESULT CODES DISPLAY | |------------------------------------------------------------| | Setting | SW1/3 | |----------------------------+-------------------------------| |>> On | Display disabled | |----------------------------+-------------------------------| | Off | Display enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | ECHO COMMANDS DISPLAY | |------------------------------------------------------------| | Setting | SW1/4 | |----------------------------+-------------------------------| |>> Off | Local echo enabled | |----------------------------+-------------------------------| | On | Local echo disabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | AUTO ANSWER | |------------------------------------------------------------| | Setting | SW1/5 | |----------------------+-------------------------------------| |>> On | Modem does not answer on first ring | |----------------------+-------------------------------------| | Off | Modem answers on first ring | +------------------------------------------------------------+ +------------------------------------------------------------+ | CARRIER DETECT | |------------------------------------------------------------| | Setting | SW1/6 | |----------------------------+-------------------------------| |>> Off | CD normal | |----------------------------+-------------------------------| | On | CD forced high | +------------------------------------------------------------+ +------------------------------------------------------------+ | MULTILINE PHONE INSTALLATION | |------------------------------------------------------------| | Setting | SW1/7 | |----------------------------+-------------------------------| |>> Off | Single phone connected | |----------------------------+-------------------------------| | On | Multiple phones connected | +------------------------------------------------------------+ +------------------------------------------------------------+ | AT COMMAND SET | |------------------------------------------------------------| | Setting | SW1/8 | |----------------------------+-------------------------------| |>> On | AT command set recognized | |----------------------------+-------------------------------| | Off | AT command set disabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | ESCAPE CODE | |------------------------------------------------------------| | Setting | SW1/9 | |---------+--------------------------------------------------| |>> On | Go to command mode and display OK result code | | | when escape character is received | |---------+--------------------------------------------------| | Off | Disconnect, go to command mode and display NO | | | CARRIER when escape character is received | +------------------------------------------------------------+ +------------------------------------------------------------+ | USER PROFILE | |------------------------------------------------------------| | Setting | SW1/10 | |----------------------------+-------------------------------| |>> Off | Use stored profile | |----------------------------+-------------------------------| | On | Use factory default | +------------------------------------------------------------+ +------------------------------------------------------------+ | TX/RX PIN ASSIGNMENT | |------------------------------------------------------------| | Setting | SW3 | |----------------------------+-------------------------------| |>> Off | Normal operation | |----------------------------+-------------------------------| | On | Reverse TX/RX pin assignments | +------------------------------------------------------------+ +------------------------------------------------------------+ | DIAGNOSTIC LED(S) | |------------------------------------------------------------| | LED | Color | Status | Condition | |-----+-------+----------+-----------------------------------| | HS | Red | On | Modem is operating at 9600bps | |-----+-------+----------+-----------------------------------| | HS | Red | Off | Modem is operating at slower than | | | | | 9600bps | |-----+-------+----------+-----------------------------------| | AA | Red | On | Auto-answer enabled | |-----+-------+----------+-----------------------------------| | AA | Red | Off | Auto-answer disabled | |-----+-------+----------+-----------------------------------| | CD | Red | On | Carrier signal detected | |-----+-------+----------+-----------------------------------| | 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 | |-----+-------+----------+-----------------------------------| | TD | Red | Blinking | Modem is transmitting data | |-----+-------+----------+-----------------------------------| | TD | Red | Off | Modem is not transmitting data | |-----+-------+----------+-----------------------------------| | TR | Red | On | DTR signal is high | |-----+-------+----------+-----------------------------------| | TR | Red | Off | DTR signal is low | |-----+-------+----------+-----------------------------------| | MR | Red | On | Power is on | |-----+-------+----------+-----------------------------------| | MR | Red | Off | Power is off | |-----+-------+----------+-----------------------------------| | MR | Red | Blinking | Modem is retraining or in test | | | | | mode. | |-----+-------+----------+-----------------------------------| | RS | Red | On | RTS signal is high | |-----+-------+----------+-----------------------------------| | RS | Red | Off | RTS signal is low | |-----+-------+----------+-----------------------------------| | CS | Red | On | CTS signal is high | |-----+-------+----------+-----------------------------------| | CS | Red | Off | CTS signal is low | |-----+-------+----------+-----------------------------------| | EC | Red | On | Error correction enabled | |-----+-------+----------+-----------------------------------| | EC | Red | Off | Error correction disabled | |-----+-------+----------+-----------------------------------| | EC | Red | Blinking | Modem is retransmitting data | |-----+-------+----------+-----------------------------------| | AL | Red | On | Analog loopback self test mode | | | | | enabled. | |-----+-------+----------+-----------------------------------| | AL | Red | Off | Normal operation | +------------------------------------------------------------+ Proprietary AT Command Set +------------------------------------------------------------+ | BIT-MAPPED REGISTER S13 | |------------------------------------------------------------| | Format | AT [cmds] S13=n [cmds] | |-----------------+------------------------------------------| | Example: | ATS13=139 | |-----------------+------------------------------------------| | Default: | 0 | |-----------------+------------------------------------------| | Range: | 0 - 255 | |-----------------+------------------------------------------| | Unit: | Bit-mapped | |-----------------+------------------------------------------| | Description: | Controls DTR reset, DTR dialing, reset | | | dialing, and MNP3. | |------------------------------------------------------------| | Bit | Value | Function | |----------+--------+----------------------------------------| | 0 |>> 0 1 | DTR normal. | | | | | | | | Reset on low DTR. | |----------+--------+----------------------------------------| | 1 |>> 0 1 | Normal auto answer operation. | | | | | | | | When ring is received, enter originate | | | | and listen for answer tone. | |----------+--------+----------------------------------------| | 2 |>> 0 1 | Pause 250ms before displaying result | | | | codes. | | | | | | | | Immediate result code display. | |----------+--------+----------------------------------------| | 3 |>> 0 1 | DTR dialing disabled. | | | | | | | | DTR dialing enabled. | |----------+--------+----------------------------------------| | 4 |>> 0 1 | Reset dialing disabled. | | | | | | | | Reset dialing enabled. | |----------+--------+----------------------------------------| | 5 |>> 0 | Not used. | |----------+--------+----------------------------------------| | 6 |>> 0 1 | MNP 3 enabled. | | | | | | | | MNP 3 disabled. | |----------+--------+----------------------------------------| | 7 |>> 0 1 | Hardware reset disabled. | | | | | | | | Hardware reset enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | BIT-MAPPED REGISTER S15 | |------------------------------------------------------------| | Format: | AT [cmds] S15=n [cmds] | |----------------+-------------------------------------------| | Example: | ATS15=139 | |----------------+-------------------------------------------| | Default: | 0 | |----------------+-------------------------------------------| | Range: | 0 - 255 | |----------------+-------------------------------------------| | Unit: | Bit-mapped | |----------------+-------------------------------------------| | Description: | Controls HST high frequency equalization, | | | online fallback, back channel, | | | non-error-correcting mode buffer, MNP4, | | | BS/DEL switch, and MNP compliance. | |------------------------------------------------------------| | Bit | Value | Function | |----------+-------+-----------------------------------------| | 0 |>> 0 1 | HST high frequency equalization | | | | enabled. | | | | | | | | HST high frequency equalization | | | | disabled. | |----------+-------+-----------------------------------------| | 1 |>> 0 1 | Online fallback enabled. | | | | | | | | Online fallback disabled. | |----------+-------+-----------------------------------------| | 2 |>> 0 1 | 450bps back channel enabled. | | | | | | | | 450bps back channel disabled. | |----------+-------+-----------------------------------------| | 3 |>> 0 1 | Non-error-correcting mode transmit | | | | buffer set to 1.5KB. | | | | | | | | Non-error-correcting mode transmit | | | | buffer set to 128 bytes. | |----------+-------+-----------------------------------------| | 4 |>> 0 1 | MNP 4 enabled. | | | | | | | | MNP 4 disabled. | |----------+-------+-----------------------------------------| | 5 |>> 0 1 | Use backspace key for delete disabled. | | | | | | | | Use backspace key for delete enabled. | |----------+-------+-----------------------------------------| | 6 |>> 0 1 | MNP normal. | | | | | | | | MNP adjusted for non compliant modems. | |----------+-------+-----------------------------------------| | 7 |>> 0 1 | Proprietary network compatibility | | | | disabled. | | | | | | | | Proprietary network compatibility | | | | enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | BREAK LENGTH | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S21=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS21=20 | |--------------+---------------------------------------------| | Default: | 10 | |--------------+---------------------------------------------| | Range: | Unidentified | |--------------+---------------------------------------------| | Unit: | 10 ms | |--------------+---------------------------------------------| | Description: | Sets the length of Error correction mode | | | breaks sent from DCE to DTE. | +------------------------------------------------------------+ +------------------------------------------------------------+ | BREAK TYPE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Yn [cmds] | |--------------+---------------------------------------------| | Example: | AT &Y0 | |--------------+---------------------------------------------| | Description: | Configures action of break signal. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &Y0 | Break empties buffer. | |--------------+---------------------------------------------| |>> &Y1 | Break empties buffer and is sent | | | immediately. | |--------------+---------------------------------------------| | &Y2 | Break does not empty buffer and is sent | | | immediately. | |--------------+---------------------------------------------| | &Y3 | Break does not empty buffer and is sent | | | with transmitted data. | +------------------------------------------------------------+ +------------------------------------------------------------+ | CONNECTION SPEED UPPER LIMIT | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Nn [cmds] | |--------------+---------------------------------------------| | Example: | AT &N1 DT555-1212 | |--------------+---------------------------------------------| | Description: | Sets required connection speed if &U is set | | | to 0. Otherwise, sets fastest allowed | | | connection speed. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &N0 | Variable. | |--------------+---------------------------------------------| | &N1 | 300bps | |--------------+---------------------------------------------| | &N2 | 1200bps | |--------------+---------------------------------------------| | &N3 | 2400bps | |--------------+---------------------------------------------| | &N4 | 4800bps | |--------------+---------------------------------------------| | &N5 | 7200bps | |--------------+---------------------------------------------| | &N6 | 9600bps | +------------------------------------------------------------+ +------------------------------------------------------------+ | DISCONNECT DISPLAY | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] S17? [cmds] | |--------------+---------------------------------------------| | Example: | ATS17? | |--------------+---------------------------------------------| | Default: | Read only | |--------------+---------------------------------------------| | Range: | 1-6, 254, 255 | |--------------+---------------------------------------------| | Description: | Displays the reason for a disconnect during | | | error correcting mode. | |--------------+---------------------------------------------| | Value | Meaning | |--------------+---------------------------------------------| | S17=1 | Received data different than requested. | |--------------+---------------------------------------------| | S17=2 | Incompatible MNP protocol. | |--------------+---------------------------------------------| | S17=3 | Connection request parameters unknown. | |--------------+---------------------------------------------| | S17=4 | Remote modem retry timeout. | |--------------+---------------------------------------------| | S17=5 | Inactivity timeout. | |--------------+---------------------------------------------| | S17=6 | Destination user not found. | |--------------+---------------------------------------------| | S17=254 | Peer protocol error. | |--------------+---------------------------------------------| | S17=255 | User initiated disconnect. | +------------------------------------------------------------+ +------------------------------------------------------------+ | ERROR CORRECTION MODE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Mn [cmds] | |--------------+---------------------------------------------| | Example: | AT &M1 %C1 | |--------------+---------------------------------------------| | Description: | Selects active error correction protocols. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &M0 | Normal mode only. | |--------------+---------------------------------------------| |>> &M4 | Auto-detect mode. | |--------------+---------------------------------------------| | &M5 | ARQ mode only. | +------------------------------------------------------------+ +------------------------------------------------------------+ | EXTENDED RESULT CODES | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &An [cmds] | |--------------+---------------------------------------------| | Example: | AT &A1 %C1 | |--------------+---------------------------------------------| | Description: | Selects extended result codes. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | &A0 | Extended result codes disabled. | |--------------+---------------------------------------------| |>> &A1 | ARQ result codes enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL CHARACTER - XOFF | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S23=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS23=20 | |--------------+---------------------------------------------| | 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] | |--------------+---------------------------------------------| | Example: | ATS22=20 | |--------------+---------------------------------------------| | Default: | 17 | |--------------+---------------------------------------------| | Range: | 11-127 | |--------------+---------------------------------------------| | Unit: | ASCII | |--------------+---------------------------------------------| | Description: | Sets the character used to represent XON. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL PASSTHROUGH | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &In [cmds] | |--------------+---------------------------------------------| | Example: | AT &I0 &W | |--------------+---------------------------------------------| | Description: | Allows modem to act on, then transmit | | | XON/XOFF characters. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &I0 | Software flow control disabled. | |--------------+---------------------------------------------| | &I1 | XON/XOFF passthrough enabled. | |--------------+---------------------------------------------| | &I2 | XON/XOFF passthrough disabled. | |--------------+---------------------------------------------| | &I3 | Hewlett-Packard host mode. | |--------------+---------------------------------------------| | &I4 | Hewlett-Packard Terminal mode. | |--------------+---------------------------------------------| | &I5 | XON/XOFF passthrough for non error | | | correction mode enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | FLOW CONTROL TYPE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] &Hn [cmds] | |--------------+---------------------------------------------| | Example: | AT &H0 A | |--------------+---------------------------------------------| | Description: | Sets type of flow control used by modem. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> &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. | +------------------------------------------------------------+ +------------------------------------------------------------+ | PAUSE | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] / [cmds] | |--------------+---------------------------------------------| | Example: | AT /// &W | |--------------+---------------------------------------------| | Description: | 125ms pause for each /. | +------------------------------------------------------------+ +------------------------------------------------------------+ | HELP SCREENS | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT $ | |--------------+---------------------------------------------| | Example: | AT &$ | |--------------+---------------------------------------------| | Description: | Shows command help screens for all commands | | | beginning with the given prefix, or no | | | prefix if none is given. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | $ | Shows ATx help screen. | |--------------+---------------------------------------------| | &$ | Shows AT& help screen. | |--------------+---------------------------------------------| | D$ | Shows ATDx help screen. | |--------------+---------------------------------------------| | S$ | Shows S-register help screen. | +------------------------------------------------------------+ +------------------------------------------------------------+ | INACTIVITY TIMER | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S19=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS19=20 | |--------------+---------------------------------------------| | Default: | 0 | |--------------+---------------------------------------------| | Range: | Unidentified | |--------------+---------------------------------------------| | Unit: | 1 minute | |--------------+---------------------------------------------| | Description: | Sets the length of time that the modem does | | | not receive information before it | | | disconnects. | +------------------------------------------------------------+ +------------------------------------------------------------+ | NO CARRIER DISPLAY | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] S20? [cmds] | |--------------+---------------------------------------------| | Example: | ATS20? | |--------------+---------------------------------------------| | Default: | Read only | |--------------+---------------------------------------------| | Range: | 0-7 | |--------------+---------------------------------------------| | Description: | Displays the reason for a NO CARRIER result | | | code.. | |--------------+---------------------------------------------| | Value | Meaning | |--------------+---------------------------------------------| | S20=0 | Key press abort. | |--------------+---------------------------------------------| | S20=1 | DTR low. | |--------------+---------------------------------------------| | S20=2 | Escape code sent. | |--------------+---------------------------------------------| | S20=3 | Connection broken. | |--------------+---------------------------------------------| | S20=4 | Inactivity timeout. | |--------------+---------------------------------------------| | S20=5 | Automatic hangup with error correction | | | incompatibility . | |--------------+---------------------------------------------| | S20=6 | Error correction retry timeout. | |--------------+---------------------------------------------| | S20=7 | Error correction received disconnect. | +------------------------------------------------------------+ +------------------------------------------------------------+ | REGISTER S18 | |------------------------------------------------------------| | Note: This register is reserved and should not be changed. | +------------------------------------------------------------+ +------------------------------------------------------------+ | REPEAT COMMAND STRING | |------------------------------------------------------------| | Type: | Configuration | |--------------+---------------------------------------------| | Format: | AT [cmds] > [cmds] | |--------------+---------------------------------------------| | Example: | AT *D1 > #E1 | |--------------+---------------------------------------------| | Description: | Causes modem to repeat command string until | | | a keyboard key is pressed. | +------------------------------------------------------------+ +------------------------------------------------------------+ | REPORT INFORMATION | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] In [cmds] | |--------------+---------------------------------------------| | Example: | AT I1 O | |--------------+---------------------------------------------| | Description: | Displays modem properties. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| | I0 | Reports product code. | |--------------+---------------------------------------------| | I1 | Reports ROM checksum result. | |--------------+---------------------------------------------| | I2 | Reports RAM checksum result. | |--------------+---------------------------------------------| | I3 | Reports call duration. | |--------------+---------------------------------------------| | I4 | Reports current command settings. | |--------------+---------------------------------------------| | I5 | Reports current NVRAM settings. | |--------------+---------------------------------------------| | I6 | Reports current connection's statistics. | |--------------+---------------------------------------------| | I7 | Reports configuration. | +------------------------------------------------------------+ +------------------------------------------------------------+ | TEST MODES | |------------------------------------------------------------| | Type: | Register | |--------------+---------------------------------------------| | Format: | AT [cmds] S16=n [cmds] | |--------------+---------------------------------------------| | Example: | ATS16=0 | |--------------+---------------------------------------------| | Description: | Controls analog loopback pattern and dial | | | tests | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> S16=0 | Testing disabled. | |--------------+---------------------------------------------| | S16=1 | Analog loopback test enabled. | |--------------+---------------------------------------------| | S16=2 | Dial test enabled. | |--------------+---------------------------------------------| | S16=4 | Test pattern enabled. | |--------------+---------------------------------------------| | S16=5 | Analog loopback with test pattern enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | TIME DISPLAY | |------------------------------------------------------------| | Type: | Immediate | |--------------+---------------------------------------------| | Format: | AT [cmds] Kn [cmds] | |--------------+---------------------------------------------| | Example: | AT K1 *L2 #E1 | |--------------+---------------------------------------------| | Description: | Displays the current call time or clock | | | time. | |--------------+---------------------------------------------| | Command | Function | |--------------+---------------------------------------------| |>> K0 | Display length of last call. | |--------------+---------------------------------------------| | K1 | Display actual time. | +------------------------------------------------------------+