Introduction
The Rockwell RS56-PCI (SoftK56) Host Software Processed V.90/K56flex™ Modem Device Family supports high speed analog data, 14.4 kbps fax, voice/TAM, and speakerphone (optional) operation. The modem operates with PSTN telephone lines in the U.S. and world-wide. Models are available in different packages with or without speakerphone support (see Table 1).

FEATUREs
• Data modem
    − ITU-T V.90, K56flex, V.34 (33.6 kbps), V.32 bis, V.32, V.22 bis, V.22, V.23, and V.21; Bell 212A and 103
    − V.42 LAPM and MNP 2-4 error correction
    − V.42 bis and MNP 5 data compression
    − V.250 (ex V.25 ter) and V.251 (ex V.25 ter Annex A)commands
• Fax modem send and receive rates up to 14.4 kbps
    − ITU-T V.17, V.29, V.27 ter, and V.21 channel 2
    − EIA/TIA 578 Class 1 and T.31 Class 1.0 commands
• Voice, telephony, TAM
    − V.253 commands
    − 8-bit µ-Law/A-Law coding (G.711)
    − 8-bit/16-bit linear coding
    − 8000/7200 Hz sample rate
    − Music on hold from host or analog hardware input
    − TAM support with concurrent DTMF detect, ring detect and caller ID
• V.80 synchronous access mode supports host-controlled communication protocols
    − H.324 interface support
• V.8/V.8bis and V.251 (ex V.25 ter Annex A) commands
• Speakerphone model (optional)
    − Telephone handset interface
    − External microphone and speaker interface
• Full-duplex Speakerphone (FDSP) Mode (SP model)
    − Microphone gain and muting
    − Speaker volume control and muting
    − Adaptive acoustic, line, and handset echo cancellation
    − Loop gain control, transmit and receive path AGC
    − Switching to/from data and fax
• Data/Fax/Voice call discrimination
• Multiple country support
    − Call progress, blacklisting
• Single profile stored in host
• Modem and audio paths concurrent across PCI bus
• System compatibilities
    − Windows 95, Windows 95 OSR2, Windows 98, Windows NT 4.0, Windows NT 5.0 operating systems
    − Microsofts PC 98 Design Initiative compliant
    − Unimodem/V compliant
• 32-bit PCI Local Bus interface
    − Conforms to the PCI Local Bus Specification, Production Version, Revision 2.1
    − PCI Bus Mastering interface to the LVC
    − 33 MHz PCI clock support
• Supports PCI Bus Power Management
    − Conforms to PCI Bus Power Management Specification, Rev. 1.1
    − ACPI Power Management Registers
    − PME# and APM support
• Device packages:
    − BIF and LVC in a single 144-pin TQFP
    − BIF in 176-pin TQFP and LC in 32-pin TQFP
    − BIF in 176-pin TQFP and LVC in 144-pin TQFP
• +3.3V operation with +5V tolerant digital inputs
• +5V (recommended) or +3.3V analog operation