POSITIVE CORPORATION ==================== PC MODEM 2400S Card Type Modem(asynchronous) Chip Set Unidentified Maximum Data Rate 2400bps Data Bus 8 bit ISA Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis +------------------------------------------------------------+ | CONNECTIONS | |------------------------------------------------------------| | Function | Label | Function | Label | |------------------------------------------------------------| | Line in | CN1 | Line out | CN2 | +------------------------------------------------------------+ +------------------------------------------------------------+ | SERIAL PORT ADDRESS | |------------------------------------------------------------| | Setting | J2 | J3 | |------------------+--------------------+--------------------| | i COM1 (3F8h) | Pins 2 & 3 closed | Pins 2 & 3 closed | |------------------+--------------------+--------------------| | COM2 (2F8h) | Pins 2 & 3 closed | Pins 1 & 2 closed | |------------------+--------------------+--------------------| | COM3 (3E8h) | Pins 1 & 2 closed | Pins 2 & 3 closed | |------------------+--------------------+--------------------| | COM4 (2E8h) | Pins 1 & 2 closed | Pins 1 & 2 closed | +------------------------------------------------------------+ +------------------------------------------------------------+ | INTERRUPT | |------------------------------------------------------------| | Setting | J1 | |----------------------------+-------------------------------| | 2 | Pins 1 & 2 closed | |----------------------------+-------------------------------| | 3 | Pins 1 & 3 closed | |----------------------------+-------------------------------| | i 4 | Pins 1 & 4 closed | |----------------------------+-------------------------------| | 5 | Pins 1 & 5 closed | +------------------------------------------------------------+ Proprietary AT Command Set +------------------------------------------------------------+ | BIT-MAPPED REGISTER S14 | |------------------------------------------------------------| | Format | AT [cmds] S14=n [cmds] | |--------------+---------------------------------------------| | Default: | 170 | |--------------+---------------------------------------------| | Range: | 0-174 | |--------------+---------------------------------------------| | Unit: | Bit-mapped. | |--------------+---------------------------------------------| | Description: | Controls echo, result codes, result code | | | display, dial mode, and answer/originate | | | mode | |--------------+---------------------------------------------| | Bit | Value | Function | |------+-------+---------------------------------------------| | 0 | 0 | Not used | |------+-------+---------------------------------------------| | 1 | 0 | Command echo disabled | | | | | | | i 1 | Command echo enabled | |------+-------+---------------------------------------------| | 2 | i 0 | Result codes enabled | | | | | | | 1 | Result codes disabled | |------+-------+---------------------------------------------| | 3 | 0 | Display result codes in numeric format | | | | | | | i 1 | Display result codes in verbose format | |------+-------+---------------------------------------------| | 4 | 0 | Not used | |------+-------+---------------------------------------------| | 5 | 0 | Tone dial enabled | | | | | | | i 1 | Pulse dial enabled | |------+-------+---------------------------------------------| | 6 | 0 | Not used | |------+-------+---------------------------------------------| | 7 | 0 | Answer mode enabled | | | | | | | i 1 | Originate mode enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | BIT-MAPPED REGISTER S21 | |------------------------------------------------------------| | Format | AT [cmds] S21=n [cmds] | |--------------+---------------------------------------------| | Default: | 16 | |--------------+---------------------------------------------| | Range: | 0 - 184 | |--------------+---------------------------------------------| | Unit: | Bit-mapped. | |--------------+---------------------------------------------| | Description: | Selects low DTR action, DCD signal, and the | | | Long Space Disconnect function. | |--------------+---------------------------------------------| | Bit | Value | Function | |------+-------+---------------------------------------------| | 0 | 0 | Not used. | |------+-------+---------------------------------------------| | 1 | 0 | Not used. | |------+-------+---------------------------------------------| | 2 | 0 | Not used. | |------+-------+---------------------------------------------| | 4, 3 | i 00 | DTR signal ignored. | | | | | | | 01 | Modem goes to command mode on low DTR. | | | | | | | 10 | Modem disconnects on low DTR. Auto-Answer | | | | is disabled. | | | 11 | | | | | Modem is initialized on low DTR. | |------+-------+---------------------------------------------| | 5 | 0 | DCD forced high. | | | | | | | i 1 | DCD normal. | |------+-------+---------------------------------------------| | 6 | 0 | Not used. | |------+-------+---------------------------------------------| | 7 | i 0 | Long Space Disconnect function disabled. | | | | | | | 1 | Long Space Disconnect function enabled. | +------------------------------------------------------------+ +------------------------------------------------------------+ | BIT-MAPPED REGISTER S22 | |------------------------------------------------------------| | Format | AT [cmds] S22=n [cmds] | |--------------+---------------------------------------------| | Default: | 117 | |--------------+---------------------------------------------| | Range: | 0-127 | |--------------+---------------------------------------------| | Unit: | Bit-mapped | |--------------+---------------------------------------------| | Description: | Controls speaker volume and controls, and | | | limits results codes | |--------------+---------------------------------------------| | Bit | Value | Function | |------+-------+---------------------------------------------| | 1, 0 | 01 | On volume | | | | | | | i 10 | Medium level volume | | | | | | | 11 | High level volume | |------+-------+---------------------------------------------| | 3, 2 | 00 | Speaker off | | | | | | | i 01 | Speaker off until carrier detect | | | | | | | 10 | Speaker always on | | | | | | | 11 | Speaker on during handshake | |------+-------+---------------------------------------------| | 6, | 000 | Basic result codes only enabled | | 5, 4 | | | | | 100 | Basic and connection speed result codes | | | | enabled | | | 101 | | | | | Basic and connection speed result codes and | | | 110 | dial tone detection enabled | | | | | | | i 111 | All result codes except dial tone detection | | | | enabled | | | | | | | | All result codes enabled | |------+-------+---------------------------------------------| | 7 | i 00 | Make/break ratio 39%/61% | | | | | | | 01 | Make/break ratio 33%/67% | +------------------------------------------------------------+ +------------------------------------------------------------+ | BIT-MAPPED REGISTER S23 | |------------------------------------------------------------| | Format | AT [cmds] S23=n [cmds] | |--------------+---------------------------------------------| | Default: | 7 | |--------------+---------------------------------------------| | Range: | 0-247 | |--------------+---------------------------------------------| | Unit: | Bit-mapped | |--------------+---------------------------------------------| | Description: | Grants/denies remote digital loopback, | | | controls DTE rate and parity, and sets | | | guard tone | |--------------+---------------------------------------------| | Bit | Value | Function | |------+-------+---------------------------------------------| | 0 | 0 | Remote digital loopback disabled | | | | | | | i 1 | Remote digital loopback enabled | |------+-------+---------------------------------------------| | 2, 1 | 00 | Sets serial port speed to 0-300bps | | | | | | | 01 | Not used | | | | | | | 10 | Sets serial port speed to 1200bps | | | | | | | i 11 | Sets serial port speed to 2400bps | |------+-------+---------------------------------------------| | 3 | 0 | Not used | |------+-------+---------------------------------------------| | 5,4 | i 00 | Parity even | | | | | | | 01 | Space | | | | | | | 10 | Parity odd | | | | | | | 11 | No Parity | |------+-------+---------------------------------------------| | 7, 6 | i 00 | Guard tone disabled | | | | | | | 01 | Guard tone 550Hz enabled | | | | | | | 10 | Guard tone 1800Hz enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | PROTOCOL | |------------------------------------------------------------| | Format | AT [cmds] S27=n [cmds] | |--------------+---------------------------------------------| | Default: | 32 | |--------------+---------------------------------------------| | Range: | 0 - 32 | |--------------+---------------------------------------------| | Unit: | Bit-mapped | |--------------+---------------------------------------------| | Description: | Selects operating protocol | |--------------+---------------------------------------------| | Bit | Value | Function | |------+-------+---------------------------------------------| | 0 | 0 | Not used | |------+-------+---------------------------------------------| | 1 | 0 | Not used | |------+-------+---------------------------------------------| | 2 | 0 | Not used | |------+-------+---------------------------------------------| | 3 | 0 | Not used | |------+-------+---------------------------------------------| | 4 | 0 | Not used | |------+-------+---------------------------------------------| | 5 | 0 | Not used | |------+-------+---------------------------------------------| | 6 | 0 | CCITT V.22bis/V.22 enabled | | | | | | | i 1 | Bell 212 enabled | +------------------------------------------------------------+ +------------------------------------------------------------+ | TEST MODES | |------------------------------------------------------------| | Format | AT [cmds] S16=n [cmds] | |--------------+---------------------------------------------| | Default: | 0 | |--------------+---------------------------------------------| | Range: | 0-125 | |--------------+---------------------------------------------| | Unit: | Bit-mapped | |--------------+---------------------------------------------| | Description: | Controls loopback tests, analog, digital, | | | remote digital, and self tests. | |--------------+---------------------------------------------| | Bit | Value | Function | |------+-------+---------------------------------------------| | 0 | i 0 | Local analog loopback disabled | | | | | | | 1 | Local analog loopback enabled | |------+-------+---------------------------------------------| | 1 | 0 | Not used. | |------+-------+---------------------------------------------| | 2 | i 0 | Local digital loopback disabled | | | | | | | 1 | Local digital loopback enabled | |------+-------+---------------------------------------------| | 3 | i 0 | Modem not in remote digital loopback. | | | | | | | 1 | Remote digital loopback in progress. | |------+-------+---------------------------------------------| | 4 | i 0 | Remote digital loopback disabled | | | | | | | 1 | Remote digital loopback enabled | |------+-------+---------------------------------------------| | 5 | i 0 | Remote digital loopback w/ self-test | | | | disabled | | | 1 | | | | | Remote digital loopback w/ self-test | | | | enabled | |------+-------+---------------------------------------------| | 6 | i 0 | Local analog loopback w/ self-test disabled | | | | | | | 1 | Local analog loopback w/ self-test enabled | +------------------------------------------------------------+