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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).

Host modem software is also provided.

Operating with +3.3V power, this device set supports 32-

bit host applications in such designs as embedded

motherboards and PCI half cards. Downloadable

architecture allows updating of MDP executable code.

In ITU-T V.90/K56flex data mode, the modem can receive

data at speeds up to 56 kbps from a digitally connected

V.90 or K56flex-compatible central site modem. A

V.90/K56flex modem takes advantage of the PSTN which

is primarily digital except for the client modem to central

office local loop and is ideal for applications such as

remote access to an Internet Service Provider (ISP), on-

line service, or corporate site. In this mode, the modem

can transmit data at speeds up to V.34 rates.

In V.34 data mode, the modem operates at line speeds up

to 33.6 kbps. When applicable, error correction

(V.42/MNP 2-4) and data compression (V.42 bis/MNP 5)

maximize data transfer integrity and boost average data

throughput. Non-error-correcting mode is also supported.

All models support remote audio recording and remote

audio playback over the telephone line interface using A-

Law,

µ-Law, or linear coding at 8000 or 7200 Hz sample

rate to support applications such as digital telephone

answering machine (TAM).

The SP model supports position independent, full-duplex

speakerphone (FDSP) operation.

Fax Group 3 send and receive rates are supported up to

14.4 kbps with T.30 protocol.

V.80 synchronous access mode supports host-controlled

communication protocols, e. g., H.324 video conferencing.

Reference design kits are available to minimize

application design time and costs.

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)

• 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

− Microsoft's 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