5+'3&,
+RVW&RQWUROOHG9 .IOH[™
0RGHP'HYLFH)DPLO\IRU'HVNWRS$SSOLFDWLRQV
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)
−
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
−
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
'DWD 6KHHW
&RQH[DQW 3URSULHWDU\ ,QIRUPDWLRQ
2UGHU 1R 0' 5HY
-DQXDU\
'LVVHPLQDWLRQ RU XVH RI WKLV LQIRUPDWLRQ LV QRW SHUPLWWHG ZLWKRXW WKH ZULWWHQ SHUPLVVLRQ RI &RQH[DQW 6\VWHPV ,QF
CONEXANT [ CONEXANT SYSTEMS, INC ]
