Cybertel Partners with Sonus Networks; Partnership to Build ``Best in Class'' VoIP Network.

Business Editors & High-Tech Writers

LA JOLLA, Calif.--(BUSINESS WIRE)--May 25, 2000

Cybertel Communications Corporation (OTC BB: CYTP) announced today that it has signed a multi-million dollar deal with Sonus Networks, Inc. (Nasdaq: SONS), a leading provider of voice infrastructure solutions for the new public network. Sonus has issued its IPO this morning and expects it to be completed today. Deployment of Sonus' complete Packet Telephony suite, including the GSX9000 Open Services Switch, the PSX6000 SoftSwitch and the SGX2000 SS7 Signaling Gateway, will position Cybertel as a Tier 1 integrated services provider with a cutting-edge national VoIP network.

"Voiceover Internet Protocol (VoIP) is the wave of the telecom future, and we're riding that wave to the top," says Richard Mangiarelli, CEO of Cybertel. "Providing integrated telecommunications to the masses isn't good enough if you don't go with the best, and our decision to go with Sonus shows how serious we are in our quest to climb to the top of the mountain and stay there."

Dial tone, Internet access and videoconferencing on demand are the state-of-the-art signature of Cybertel. With the Sonus solutions, Cybertel expects to have this revolutionary new telecommunications network fully functional in ten major U.S. markets by September of this year. Cybertel, which is already positioning itself as a leader in the new breed of "Integrated Communications Providers," combining local, long distance and Internet access in a single digital product, is in the process of expanding its network over the next year to include 56 gateways around the U.S.

"Our network will be so advanced that any who dare to follow in our footsteps will find themselves being too little too late," adds Peter Buswell, COO of Cybertel. "Sonus is setting the bar for packet telephony solutions for the carrier market. Their systems have been built for one purpose: to be the most advanced voice infrastructue solutions on the market. Our network is a combination of `dial around,' local access and true 1+ carrier access over both DSL and VoIP. And we can't build a true 1+ network alternative by using the current crop of modified PCs. Our system is built to be the best, and to grow with the technology to stay the best."

Sonus has made its name serving the biggest names in the industry, including Global Crossing (Nasdaq: GBLX) and Williams Communications (NYSE: WCG). Cybertel's relationship with Sonus is extremely significant in that it will give the company the only other IP network with 1+ dialing capability besides Level 3 Communications (NASDAQ: LVLT) - Cybertel's strategic co-location partner. This will also make Cybertel the only company that focuses exclusively on Internet-based telephony and Internet services to possess this type of advanced IP network.

About Sonus Networks

Sonus Networks, Inc. (Nasdaq: SONS) is a leading provider of voice infrastructure products for the new public network. Sonus' solutions enable service providers to deploy an integrated network capable of carrying both voice and data traffic, and to deliver a range of innovative, new services. The Sonus Open Services Architecture(TM) (OSA) and award-winning Packet Telephony suite cut the time-to-market for competitive new service products, allowing carriers and third-party developers to expand marketshare and build important new revenue streams. Its highly scalable products fully interoperate with and extend the life and utility of today's public network. Sonus embodies in its management and staff decades of experience in developing carrier-class solutions at companies such as Cisco Systems (Nasdaq: CSCO), Lucent Technologies (NYSE: LU), and Nortel Networks (NYSE: NT). Sonus, founded in 1997, is headquartered in Westford, Massachusetts.

About Cybertel Communications

Cybertel is a La Jolla, California-based Voice-over the Internet Telephony (VoIP) company in the process of building a state-of-the-art Internet Telephony network throughout the United States. Cybertel has recently signed contracts with other major carriers like MCI/Worldcom (Nasdaq:WCOM) and Level 3 Communications, which have made it possible for Cybertel to offer 1+ long distance, 1-800 numbers, regular and pre-paid calling cards and Internet access at some of the most competitive rates on the market today.

In the past, Cybertel has been a switchless carrier, acting as a wholesaler that buys long-distance capacity from large carriers and then resells that capacity to its customer base. Its customers' calls have been routed through other larger telecommunications companies' switches. The nation's largest traditional switched carriers include companies such as MCI/Worldcom, Sprint, AT&T, Global Crossing, Qwest (NASDAQ: QWST) and Williams Communications. Companies offering VoIP related services include ITXC Corp (NASDAQ: IXTC) and VocalTec (NASDAQ: VOCL).

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