Compaq SoftK56 - Manual

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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).

The SoftK56 modem family is available in three forms:

1. A single 144-pin thin quad flat pack (TQFP) that

combines the PCI Bus Interface (BIF) and Line Codec
(LC). This is the lowest cost device option. This
device set also supports data/fax/voice/TAM with
optional speakerphone using the Line/Voice Codec
(LVC).

2. A 2-device set plug-compatible with Rockwell’s

RC56HCF-PCI host-controlled modem family. The
two devices are the PCI Bus Interface in 176-pin
TQFP and LVC in 144-pin TQFP. This device set
supports data/fax/voice/TAM with optional
speakerphone.

3. A 2-device set with a Line Codec (LC) in the smallest

device footprint. The two devices are the PCI Bus
Interface in 176-pin TQFP and LC in 32-pin TQFP.
This device set supports data/fax/voice/TAM.

This device set is intended for application in PCI-based
embedded motherboards, system boards, or plug-in cards
designed for desktop use. Typical application block
diagrams are illustrated in Figure 1.

Modem data pump and controller functions, traditionally
enabled using dedicated hardware, are processed in a
Pentium MMX-compatible CPU using host-signal
processing modem software.

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/K56flexmodem takes advantage of the PSTN which
is primarily digital except for the client modem to central
office local loop and are 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) and voice annotation.

SP models support position independent, full-duplex
speakerphone (FDSP).

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

•

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