Introduction The Conexant RH56D-PCI V.90/K56flex™ Host Controlled Modem Device Family supports high speed analog data up to 56 kbps, 14.4 kbps fax, voice/TAM, and speakerphone (optional) operation. The modem operates with PSTN telephone lines in the U.S. and world-wide. The modem is available with or without speakerphone support (see Table 1). The modem is packaged in a single 144-pin thin quad flat pack (TQFP) that combines PCI Bus Interface (BIF) and Modem Data Pump (MDP) functions. This modem is pin-compatible with the SoftK56-PCI modem, part number R6793 (see SoftK56-PCI data sheet Order No. MD231). 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 • Full-duplex Speakerphone (FDSP) Mode (SP model) − Telephone handset interface − External microphone and speaker interface − Microphone gain and muting − Speaker volume control and muting − Adaptive acoustic, line, and handset echo cancellation − Loop gain control, transmit and receive path AGC • 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 − Pentium 133 MHz equivalent or greater − 16 Mbyte RAM or more • 32-bit PCI Local Bus interface − Conforms to the PCI Local Bus Specification, Production Version, Revision 2.1 − PCI Bus Mastering interface to the MDP − 33 MHz PCI clock support
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