PAIX.Net, Inc. (PAIX), a neutral Internet Exchange, and a subsidiary of Metromedia Fiber Network, Inc. (MFN) (Nasdaq: MFNX), announces the opening of its second Bay Area facility. The new facility is located in San Francisco in the South of Market area and will open this July. In addition, PAIX is announcing that the original Palo Alto facility and the new San Francisco facility will be linked so customers can seamlessly exchange traffic with both public and private peering partners in either site.

The San Francisco facility boasts accessibility to San Francisco metro area fiber infrastructure providers, Class A facility specifications and ample space to handle the high demand for Internet connectivity and Internet traffic exchange in the Bay Area.

To ensure seamless interconnectivity for its Bay Area participants, PAIX will link the sites to provide a single peering switch fabric that permits both public peering and virtual private peering. Thus, the two locations will function together as one virtual PAIX facility. Private, high bandwidth inter-site connections will also be available, and will scale up to 2.5 gigabits per second.

In announcing Virtual Network Interconnections ("VNIs"), PAIX is providing private virtual connectivity for customers within the same site or between PAIX sites in a single metro area. VNIs allow customers to connect privately to one or more peering partners through a single port on the switch. Currently VNIs will become available immediately in the two San Francisco Bay Area locations and in other PAIX sites as the demand for the service increases.

PAIX serves as a primary Internet peering hub and enables the exponential growth of the Internet through its geographically dispersed facilities. National service providers depend on PAIX to provide regional and national carrier-independent data switching, promoting faster network performance.

PAIX neutrality gives participants an open marketplace in which to conduct business with other PAIX participants without the interference of a controlling entity. This neutrality combined with PAIX's scalability, proven track record, and the freedom of choice it offers customers, sets PAIX apart from others in the Internet exchange business. PAIX has strategically placed Internet Exchange locations in the San Francisco Bay Area, Vienna, VA, Seattle, New York City, Atlanta, and Dallas, and will open additional facilities in Boston and Los Angeles this summer.

As a neutral exchange point, PAIX is never a party to its customers' business arrangements, except to provide both virtual and passive media cross-connects between participants and between telecommunications providers and participants. The participant list for each site is made available to customers, facilitating their ability to make private business arrangements with each other.

About PAIX.Net:

PAIX, headquartered in Palo Alto, California, began operations in 1996 as Digital Equipment Corporation's Palo Alto Internet Exchange. PAIX.Net serves as a packet switching center for ISPs and offers secure, fault-tolerant co-location services to ISPs. For more information, visit www.paix.net.

About Metromedia Fiber Network, Inc.:

Metromedia Fiber Network, Inc. deploys optical IP Internet infrastructure within key metropolitan areas domestically and internationally. For more information, visit www.mmfn.com.