According to the companies, the pact will be announced Wednesday at the Western Cable 2000 show in Los Angeles, an annual gathering of the cable networking industry.
Under terms of the deal, Juno, the third-largest dial-up Internet service provider in the United States, will offer its high-speed Juno Express over Comcast's network in what will be the cable company's first trial of multiple ISPs on its network. The trial will start in the first quarter of 2001 in the Philadelphia area, the companies said.
Comcast Cable Communications is a division of Comcast. It will serve more than 8.2 million cable subscribers, pending currently outstanding cable transactions.
Juno is among several ISPs already testing open access with AT&T, one of the nation's largest cable operators, in Colorado. Ma Bell, after nearly two years of regulatory and consumer advocacy pressure, has agreed to open its cable networks to other ISPs for use as a high-speed Net conduit.
In addition, America Online and Time Warner, in the face of scrutiny by the Federal Trade Commission, have agreed to open their cable networks to competing ISPs. Time Warner recently agreed to allow EarthLink to use its cable systems for high-speed Net access for a fee and is said to be in talks with Juno for a similar agreement.
The deal between Juno and Comcast marks the third major cable operator to formally agree to open its networks--or at least to test the feasibility of doing so--since summer.
Juno will be the first third-party company to offer high-speed Net service over Comcast's network.
News.com's Jim Hu contributed to this report.