Specifications

|Modems
18
and PCI Bus interface operation. The modem operates with PSTN
telephone lines in the U.S. and optionally, worldwide. Conexant’s
USB modem solution takes the V.92/V.90 modem chipset family
one step further to provide an inexpensive, easy-to-use, campact
external modem.
SmartHCF™ Modem Device Set
The SmartHCF device set, consisting of a P9573 Host Side Device
(HSD) in a 100-pin TQFP and a 20463 SmartDAA Line Side Device
(LSD) in a 32-pin TQFP, supports data/fax/TAM operation with
hardware-based digital signal processing and DAA/telephone line
interface functions. The optional 20437 Voice CODEC (VC), in a
32-pin TQFP, supports voice/FDSP operation with interfaces to a
microphone, speaker, and telephone handset/headset. In V.90
data mode, the modem can receive data at line speeds up to 56K
from a digitally connected V.90-compatible central site modem.
In this mode, the modem can transmit data at line speeds up to
V.34 rates.
This modem device set is pin-compatible with the SmartHSF
modem, which supplies similar functionality with host MMX-based
signal processing.
Conexant’s SmartDAA proprietary technology eliminates the need
for a costly line transformer, relays, and opto-isolators typically
used in discrete DAA implementations. The SmartDAA architecture
also simplifies product implementation by eliminating the need
for country-specific board configurations. This enables worldwide
homologation of a single modem board design.
The SmartDAA system-powered DAA operates reliably without
drawing power from the line, unlike line-powered DAAs which
operate poorly when line current is insufficient due to long lines
or poor line conditions. Enhanced features, such as line-in-use
detection, are also supported. Incorporating Conexant’s proprietary
Digital Isolation Barrier (DIB) design (patent pending) and other
innovative DAA features, the SmartDAA architecture simplifies
application design, minimizes layout area, and reduces
component cost.
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.
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. Audio recording and playback over the telephone
line interface using A-Law, µ-Law, or linear coding at 8 KHz
sample rate supports applications such as remote digital TAM.
SmartHCF USB Modem Device Set
Conexant’s SmartHCF Universal Serial Bus (USB) modem solution
takes the V.90 modem chipset family one step further to provide an
inexpensive, easy-to-use, compact external modem. With the addition
of Conexant’s SmartDAA technology, the SmartHCF USB modem
enables system designers to have a single worldwide solution for a
truly global, low-cost external modem with USB connectivity for
desktop and mobile PCs, requiring minimal design efforts.
The SmartHCF USB modem chipset takes advantage of the USB’s
power management capability, enabling our customers to lower
their costs by eliminating the need for an external power supply.
Furthermore, the SmartDAA includes remote hang up, extension
off-hook, and call-waiting detection support, as well as digital
PBX line protection.
Conexant’s SmartHCF USB chipset consists of three devices:
• Conexant USB Interface Device (UID)
• Conexant P93 datapump
• Conexant 20463 SmartDAA technology
Features
• ITU-T V.90 and K56flex modem
• Compliant with USB 1.1 specification
• Support for Windows
®
98 and Windows
®
2000
• USB power management
• Low-cost external solution
• Incorporates SmartDAA technology
• Full featured (V.90, fax and voice)
• Fax Class 1
Conexant supplies USB drivers for Windows
®
98 and Windows
®
2000,
which includes support for power management features that allow
the PC to go into suspend mode, and then resume when there
is a wake-up event. Conexant’s SmartHCF USB solution brings the
Part Number DS56-L511-011
Description SmartHCF/S-USB
Part Number DS56-L152-061
Description SmartHCF/W V.92 Modem
Part Number DS56-L152-071
Description SmartHCF/WS V.92 Modem
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