PHILADELPHIA, Jun 26, 2008 (BUSINESS WIRE) -- Comcast Corporation (Nasdaq: CMCSK, CMCSA), the nation's leading
provider of entertainment, information and communications products and
services, today announced it has successfully completed a 100 Gigabit
Ethernet (GE) technology test over its existing backbone
infrastructure between Philadelphia and McLean, VA using the
industry's first 100GE router interface developed for the Cisco CRS-1
routing system. This demonstration is another example of Comcast's
commitment to technology that supports the rapid growth of new
applications and services.

The Cisco CRS-1 100GE interface uses Comcast's existing optical
infrastructure to enable transmission of 100GE over DWDM fiber optic
networks. Utilizing this type of technology will enable companies,
like Comcast, to increase bandwidth per wavelength by a factor of 10
over the initial deployed capability. It also creates efficiencies by
simplifying routing and operations through the use of statistically
multiplexed 100GE links, in comparison to carrying the same amount of
traffic split over more commonly used 10GE links.

"This demonstration is another important step in the future of
100GE networking and we're pleased with Cisco's latest advancements,"
said John Schanz, Executive Vice President of National Engineering and
Technical Operations for Comcast Cable. "Comcast's single converged
core IP network already carries more video, voice, and data traffic
than any other, and this new achievement will allow us to scale for
tomorrow, while continuing to drive capital and operational
efficiencies today."

"The Cisco CRS-1 was purpose-built to deal with the exploding
growth in IP traffic that has been fueled by video-based services,"
said Kelly Ahuja, Cisco vice president and general manager of core
routing business unit. "By developing a 100GE interface for the Cisco
CRS-1 platform, providers like Comcast can take advantage of economies
of scale, flexibility and increase the quality of service delivery as
they move towards 100G IPoDWDM networks."

The implementation tested by Comcast and Cisco is consistent with
the emerging IEEE 802.3ba 100GE standard and validates the use of
100GE and IPoDWDM technologies over Comcast's own production network,
which was the first, and is currently the world's largest 40G IPoDWDM
network.

About Comcast Corporation

Comcast Corporation (Nasdaq: CMCSA, CMCSK)
(http://www.comcast.com) is the nation's leading provider of
entertainment, information and communications products and services.
With 24.7 million cable customers, 14.1 million high-speed Internet
customers, and 5.2 million voice customers, Comcast is principally
involved in the development, management and operation of broadband
cable systems and in the delivery of programming content.

Comcast's content networks and investments include E!
Entertainment Television, Style Network, The Golf Channel, VERSUS, G4,
PBS KIDS Sprout, TV One, ten Comcast SportsNet networks and Comcast
Interactive Media, which develops and operates Comcast's Internet
business. Comcast also has a majority ownership in Comcast-Spectacor,
whose major holdings include the Philadelphia Flyers NHL hockey team,
the Philadelphia 76ers NBA basketball team and two large multipurpose
arenas in Philadelphia.

About Cisco

Cisco Systems, Inc. (NASDAQ: CSCO) is the worldwide leader in
networking that transforms how people connect, communicate and
collaborate. Information about Cisco can be found at
http://www.cisco.com. For ongoing news, please go to
http://newsroom.cisco.com.

SOURCE: Comcast Corporation

Press Contact:
Comcast:
Jenni Moyer, 215-286-3311
or
Cisco:
Kevin Petschow, 773-444-5106

Copyright Business Wire 2008