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ChannelWorks Extended Ethernet LAN Connectivity

HIGHLIGHTS

o  Provides extended Ethernet LAN connections over cable TV (CATV) up to 70
   miles without disrupting existing CATV offerings, using unparalleled
   frequency agility

o  Complies with IEEE 802.3 Ethernet standards and is SNMP manageable

PRODUCT DESCRIPTION

The ChannelWorks product provides distributed, high speed, network
bandwidths for sites in metropolitan areas, using existing public cable
plants. It is a cost-effective alternative to existing and planned telephone
company offerings. Because the ChannelWorks product can be used on the full
spectrum of public CATV networks, channel assignments will accommodate
potential users in all metropolitan areas.

BENEFITS

At a fraction of the cost of today's point-to-point communications
solutions, this extended Ethernet LAN connectivity service incorporates the
ChannelWorks bridging technology, network planning, and network management
services along with a CATV infrastructure to offer you a true information
utility service.

The ChannelWorks product is based on existing standards, providing you with
investment protection and complementing Digital's other networking products.
The high speed, distributed network technology, combining SNMP network
management with easy configuration and maintenance, is familiar to most
network managers.

COMPARISON WITH OTHER VENDORS' PRODUCTS

As the following table indicates, ChannelWorks performance outpaces that of
competing products.

Vendor    Frequency Range            Distance   Data Rate  Frequency Selection

3Com	  6 defined TX channels	     30 miles	5 Mb/s	   Preset at
	  6 defined RX channels	     Roundtrip	6 MHz	    factory

Chipcom	  5 defined TX channels	     24 miles	10 Mb/s	   Preset at
	  5 defined RX channels	     Roundtrip	12 MHz	    factory

Hughes/	  5 defined TX channels	     24 miles	10 Mb/s	   Preset at
LAN	  5 defined RX channels	     Roundtrip	12 MHz	    factory

Zenith	  5 defined TX channels	     30 miles	4 Mb/s	   User-
	  5 defined RX channels	     		6 MHz	    selectable

Digital	  28 selectable TX channels  70 miles	10 Mb/s	   User-
	  83 selectable RX channels  		 6 MHz	    selectable

The frequency agility is a key differentiator as it allows the CATV company
to slot data traffic where it wants and to avoid conflicts with its current
entertainment schedules.

AVAILABILITY AND ORDERING

The ChannelWorks product is available now (a leasing program is also
available).

Order No.	 Description

DECTV-AA	 ChannelWorks product
DECTV-AB	 ChannelWorks international variant
EK-DECTV-IN	 Network Installer's Guide
EK-DECTV-IG	 CATV Installer's Guide
EK-DECTV-MG	 Management Guide

SERVICES

The ChannelWorks product carries telephone support coverage. Custom services
and ancillary products are available for initial CATV plant certification
and installation.

CONFIGURATION

o  One DECTV-AA per user site.
o  If a single cable plant is used, a translator is required at the CATV
   headend.
o  If a dual cable plant is used, a translator is not required.
o  Depending on the CATV plant (sub-split, mid-split, or high-split), a
   diplex filter is required for each ChannelWorks bridge.

__________
Zenith is a registered trademark of Zenith Electronics Corporation.
Chipcom is a registered trademark of Chipcom Corporation.
3Com is a registered trademark of 3Com Corporation.