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