PRACTICAL PERIPHERALS, INC. PC144HC Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 14.4Kbps Maximum Fax Rate 14.4Kbps Data Bus 8-bit ISA Fax Class Class I & II Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis Fax Modulation Protocol ITU-T V.17, V.27ter, V.29 Error Correction/Compression MNP5, V.42, V.42bis [Image] CONNECTIONS Purpose Location Purpose Location Line out CN1 Line in CN2 BASE I/O ADDRESS SELECTION Address SW1/1 SW1/2 COM1: (3F8h) On On COM2: (2F8h) On Off COM3: (3E8h) Off On COM4: (2E8h) Off Off INTERRUPT SELECTION IRQ JP1 pins 1 & 2 JP1 pins 3 & 4 JP1 pins 5 & 6 » 3/4 Closed Open Open 2 Open Closed Open 5 Open Open Closed Proprietary AT Command Set EXTENDED RING Format: AT [cmds] S101=n [cmds] Example: ATS101=40 Default: 0 Range: 0 - 255 Unit: Bit-mapped Description: Selects the response to extended ring types. Bit Value Function 0 » 0 Do not respond to ring type A. 1 Respond to ring type A. 1 » 0 Do not respond to ring type B. 1 Respond to ring type B. 2 » 0 Do not respond to ring type C. 1 Respond to ring type C. 3 » 0 Do not respond to ring type D. 1 Respond to ring type D. 4 » 0 Do not respond to ring type E. 1 Respond to ring type E. 5 » 0 Do not respond to ring type F. 1 Respond to ring type F. 6 » 0 Do not respond to ring type G. 1 Respond to ring type G. 7 » 0 Report RING for all ring types. 1 Report RING n where n is the ring type. HELP SCREENS Type: Immediate Format: AT [cmds] $H Example: AT $H Description: Shows modem help screens. LAP-M PACKET SIZE Type: Immediate Format: AT [cmds] S136=n [cmds] Example: AT S136=2 %C1 Description: Sets the frame size for an LAP-M connection. Command Function S136=0 Select 128 byte frame size. » S136=1 Select 256 byte frame size. S136=2 Select 512 byte frame size. REDIAL Type: Immediate Format: AT [cmds] DL Example: AT M1 DL Description: Redials the last number dialed. V.22 PROBE REJECT TIME Type: Register Format: AT [cmds] S97=n [cmds] Example: ATS97=15 Default: 30 Range: 15-70 Unit: .1 second Description: Sets the time for which the modem will reject the V.22/V.22bis probe signal when in V.32 mode.