Broadband Modems
ADSL Modems
CX82320
Single-Chip USB ADSL Modem
CX82320 Distinguishing Features
USB ADSL chipset and drivers
Full-rate ADSL and G.lite operation
Annex A and Annex B support
Integrated ADSL transceiver,
AFE, and Line Driver
USB 1.1 Interface
Optimized USB ADSL architecture
Bus-powered USB device
Plug-n-Play installation without
opening the PC
208-pin fine pitch ball grid array
(FPBGA)
Broadband Internet Connectivity
Conexant's broadband communications portfolio includes a comprehensive
suite of semiconductor solutions that enable the digital home and information
network. The newest member of Conexant's AccessRunner family,
the CX82320 modem device integrates all of the hardware functions of
a USB controller, ADSL discrete multi-tone (DMT) engine, analog front end
(AFE), and line driver on a single-chip. This comprehensive device combines
the most cost-effective solution with the design simplicity of single-chip
integration. The CX82320 ADSL modem device is fully compliant with both
the full-rate ADSL (T1.413 Issue 2 and G.dmt) and the splitterless G.lite
(G.992.2) standards.
Conexant's CX82320 modem device provides an "always on" high-speed
broadband connection to the Internet. Using existing twisted pair telephone
lines, ADSL technology provides data rates over 100 times the speed of a
traditional analog modem, without an interruption in telephone service. With
data transfer rates up to 8 Mbps downstream and 1 Mbps upstream, ADSL
is the ideal solution for high-bandwidth applications such as access to a
corporate network, Internet access and video delivery.
Conexant's ADSL chipsets support the full range of ADSL standards
based on industry-standard discrete multitone (DMT) line-code technology.
The versatile USB ADSL customer premise equipment (CPE) chipset is a
cost-effective solution optimized for today's market, which demands
ease-of-installation without opening the PC.
Part Number CX82320
Description Single-Chip USB ADSL Modem
Single-Chip USB ADSL Modem
USB WDM
USB
softSAR AAL5/UBR
NDIS/NDIS WAN
RJ-11
CX82320
Host PC
Software Driver
2002, Conexant Systems, Inc. All Rights Reserved. Conexant and the
Conexant logo are trademarks of Conexant Systems, Inc. All other trademarks
are owned by their respective owners. Although Conexant strives for accuracy
in all its publications, this material may contain errors or omissions and is
subject to change without notice.
THIS MATERIAL IS PROVIDED AS IS AND WITHOUT
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT.
Conexant shall not be liable for any
special, indirect, incidental or consequential damages as a result of its use.
02-0672
Broadband Modems
ADSL Modems
CX82320 Features
ADSL Compliance
- Compliant with ADSL standards
Full-rate ANSI TI.413 Issue 2 and ITU G.dmt (G.992.1)
Splitterless ITU G.lite (G.992.2)
- DMT modulation and demodulation
- Rate adaptive
Maximum downstream rate of 8 Mbps
Maximum upstream rate of 1 Mbps
- Supports splitterless full rate operation
- Time detection for low power mode
- Supports Dying Gasp
- Interoperable with all major DSLAMs
ATM Protocols
- WAN mode support: PPP over ATM (RFC 2364) and PPP over
Ethernet (RFC 2516)
- LAN mode support: bridged/routed Ethernet over ATM (RFC 1483)
and classical IP over ATM (RFC 1577)
- ATM Forum UNI 3.1/4.0 PVC
- ATM SAR (segmentation and reassembly)
- ATM AAL5
- OAM F4/F5
USB Interface
- Compliant with USB Specification 1.1
- USB full speed (12 Mbps)
- Vendor-specific descriptors
- Bus-powered
Operating System Support
- Windows 98/98 SE
- Windows 2000
- Windows ME
- Windows XP
- Plug and Play Installation
Driver Applications
- Windows Control Panel
- Installation Wizard
- Task Bar Application
- All applications are customizable
- All applications support multiple languages
www.conexant.com
General Information:
U.S. and Canada: (800) 854-8099
International: (949) 483-6996
Headquarters Newport Beach
4311 Jamboree Rd, P.O. Box C
Newport Beach, CA 92660-3095
Order# 101990A
Optimized USB ADSL Solution
The USB ADSL device set is shown together with the PC drivers
in the diagram. The PC drivers use only a fraction of the PC's
host processor.
Conexant's `softSAR' technology provides the ATM segmentation
and reassembly (SAR) function as part of the PC driver. This elimi-
nates the need for a costly dedicated ATM SAR device, required
in other ADSL modems. However, in order not to unnecessarily
burden the host and the USB controller, the idle cell insertion and
deletion that takes place when no information is being transferred
across the ADSL link is performed as part of the chipset.
Without the need for an additional ATM SAR device, Conexant's
CX82320 is the most cost-effective, optimized solution designed
for the USB.
ADSL Drivers
Conexant's PC drivers are designed for use with Windows XP,
Windows 98, Windows 2000, and Windows ME and fully
leverage Microsoft's built-in features for the support of USB ADSL
peripherals. In addition to softSAR functionality, the drivers fully
support the recognized standards for PPP over ATM (RFC2364),
PPP over Ethernet (RFC2516), Ethernet bridging/routing over ATM
(RFC1483), and classical IP over ATM (RFC1577). A control panel
applet is provided for real-time diagnostic information, and hooks
are included to allow automatic configuration of the ADSL modem
and the drivers.
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