CNN Field Trial for Multicasting Broadcast Video Over IP a Success.

Business Editors

SAN DIEGO--(BUSINESS WIRE)--Nov. 7, 2001

CoreExpress, Inc. and Path 1 Network Technologies Inc. (OTCBB: PNWK; Frankfurt: PNT), today announced the successful conclusion of a 90-day field trial with CNN (NYSE: AOL) to test multicasting of broadcast quality video over an IP network.

Coordinated by a team of leading technology companies, the field test has shown that IP networks can be used as a high quality and reliable means for exchanging live and taped news material between CNN affiliated stations. The field test which linked Los Angeles, Washington D.C., St. Louis and Atlanta, required coordination by seven companies: BellSouth (NYSE: BLS), CoreExpress, Path 1 Network Technologies, Leitch (NASDAQ: LVID), Cisco Systems (NASDAQ: CSCO), Pixelmetrix and Tandberg Television.

"The possibilities yielded by this field test are very exciting," said Tony Seaton, vice president corporate technology and standards, Turner Broadcasting System. "The trial achieved the desired level of multicast capability, latency and video quality and delivers the level of service we need to exchange news with CNN affiliates ranging from large metropolitan to small market stations.

"In fact, during the first days of coverage of the September 11 attacks we were able to use the IP circuits to deliver material from Washington D.C. and Los Angeles to Atlanta for live news coverage."

The trial participants each provided a key technology or service piece integral to building a video exchange service using IP multicast.

BellSouth provided project management expertise and BellSouth's Metro Ethernet Service, running at speeds up to 100Mbps. BellSouth recently announced the availability of Metro Ethernet Service with speeds up to 1Gbps as part of its Metro Ethernet Service portfolio. CoreExpress provided a nationwide private, quality of service (QoS) enabled IP network capable of delivering MPLS Fast Re-route, and guaranteed service level agreements (SLAs) over multiple ISPs. They also provided lead technical project coordination and network monitoring. Path 1 provided first of its kind video gateways that convert MPEG 2 video to IP and support multicasting, and acted as lead technical coordinator and support arm for the project. Cisco Systems provided routers and switches. Leitch provided servers and business and technical coordination for non-real time file transfer tests. Tandberg Television provided MPEG 2 encoders and decoders. Pixelmetrix provided the monitoring and validation of Transport Streams and Picture Quality performance assessment.

"We leveraged a unique combination of technologies and products to demonstrate that a carrier IP network can be a reliable transport of live broadcast quality MPEG 2 video," said Mike Brown, lead product developer from CoreExpress. "The use of IP multicast for the MPEG 2 video demonstration proved that high volumes of video traffic can be cost effectively delivered to large numbers of affiliates."

There were many firsts demonstrated with this trial, including:

- Inter-carrier delivery of live MPEG 2 video at 30 Mbps without ETR-290 errors


- Simultaneous transfer of both real-time and non-real-time (file transfer)
contents

- End-to-end QoS on an IP network that guaranteed the delivery of MPEG 2 4:2:2
traffic

- High availability of an IP backbone (99.9%)

- IP multicast over a carrier MPLS backbone using Juniper and Cisco equipment

- Protection switching of IP multicast traffic using MPLS Fast Re-route in less
than 15 milliseconds

- Exceeding SLAs (in jitter, latency, loss, burst loss duration, re-order rate,
etc.)

- Adapting MPEG 2 to IP without undue degradation of jitter characteristics

- Remote monitoring and control of multiple vendor's video and LAN equipment
(gateways, video servers, analyzers, LAN switches, IP routers).

About Path 1 Network Technologies Inc.

Path 1 Network Technologies Inc. (OTCBB:PNWK; Frankfurt:PNT) is the world's award-winning leader in broadcast video quality over IP technology. From the delivery and distribution of broadcast materials and Video on Demand, to videoconferencing and security monitoring, Path 1's video infrastructure platforms allow high quality transmissions of point-to-point and multiplexed data over legacy IP systems. Patented products and unique know-how provide stable and error free transport of real time applications, including broadcast and entertainment content exchanges. Additional information can be obtained at the company's Web site, www.Path1.net or call 877/ONE-PATH.

About CoreExpress

CoreExpress, the first network provider to guarantee QoS over multiple ISPs, is providing the long-haul backbone transport, an IP network designed to provide MPLS, Fast Re-Route and Qos over multiple ISPs, and network monitoring and network integration services for this trial. On Nov. 1, 2001, CoreExpress and Williams Communications Inc. (Tulsa) announced the completion of an acquisition agreement for Williams to take over operations of the CoreExpress Network, products and select personnel. CoreExpress has deployed a 16,000 mile nationwide fiber optic network and is located in St. Louis Mo. and Herndon, Va. CoreExpress' web site is http://www.coreexpress.com/.

About BellSouth Corporation

BellSouth Corporation is a Fortune 100 communications services company headquartered in Atlanta, GA, serving more than 46 million customers in the United States and 15 other countries.

Consistently recognized for customer satisfaction, BellSouth provides a full array of broadband data and e-commerce solutions to business customers, including Web hosting and other Internet services. In the residential market, BellSouth offers DSL high-speed Internet access, advanced voice features and other services. BellSouth also provides online and directory advertising services, including BellSouth(R)RealPages(SM).com.

BellSouth owns 40 percent of Cingular Wireless, the nation's second largest wireless company, which provides innovative wireless data and voice services.

About Leitch

Leitch Technology Corporation provides leading-edge solutions to store, switch, distribute, convert, and otherwise process high-quality audio and video signals. Applications for Leitch products span the broadcast, telco, cable, post production, Internet, and business-to-business markets. Leitch is headquartered in Toronto, Ontario, with other key offices in Virginia, California, the United Kingdom, Brazil, Japan, Hong Kong and Australia. For more information visit: www.Leitch.com.

About Cisco Systems

Cisco Systems (NASDAQ:CSCO) is the worldwide leader in networking for the Internet. Cisco news and information are available at www.cisco.com.

About Tandberg Television

TANDBERG Television (Oslo, Norway, Stock Exchange: TAT) is a market leader in the provision of open solutions for the digital broadcasting of audio, data and video across various networks including IP and telecom. As part of the trial, evolution 5000 MPEG encoders and decoders are being integrated into the overall solution. For more information visit: www.tandbergtv.com.

About Pixelmetrix

Pixelmetrix Corporation is the global expert in preventative monitoring for digital networks. The company provides with its DVSstation(TM) network intelligence surveillance to digital broadcasters and telecom operators for management and monitoring of broadcast quality of service. Headquartered in Singapore, Pixelmetrix has offices in the United States and Europe. For more information visit: www.pixelmetrix.com.

This news release contains "forward-looking statements" that are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. "Forward-looking statements" describe future expectations, plans, results, or strategies and are generally preceded by words such as "future," "plan" or "planned," "will" or "should," "expected," "anticipates," "draft," "eventually," or "projected." You are cautioned that such statements are subject to a multitude of risks and uncertainties that could cause future circumstances, events, or results to differ materially from those projected in the forward-looking statements, including the risks that Path 1 may be unable to obtain necessary financing to continue development, acquired businesses that are geographically and culturally distinct may not be able to be successfully integrated and Path 1 may be unable to find suitable licensees and strategic allies on suitable terms, and other risks identified in Path 1's annual report on Form 10-K and other filings with the SEC. You should consider these factors in evaluating the forward-looking statements included herein, and not place undue reliance on such statements. The forward-looking statements are made as of the date hereof, and Path 1 undertakes no obligation to update such statements.