SIGNAFOR APPOINTS PHILIP MCKINNEY INTERIM CEO AND BOARD MEMBER

Teligent's Founding CIO Joins Firm To Bring Breakthrough IP Switching Technology To Market

Dunn Loring VA; 11 September 2001 - Signafor, Inc., a developer of patented IP switching and QoS technologies, today announced that the company's Board of Directors appointed Philip McKinney as Interim CEO and Board member. Mr. McKinney is the Managing Partner of Techtrend Group, a management consulting firm to high technology companies.
Prior to joining Techtrend, he was the Senior Vice President for e-Business at Teligent (NASDAQ: TGNT), a leading broadband provider. He was with Teligent for more than three years having led the infrastructure build as Teligent's founding CIO.
"Phil McKinney is the ideal executive to take Signafor to the next level as we move our technology beyond the R&D stage towards a commercial offering," said Carol Anderson, Signafor Chairman and Managing Director of New Century Investors, LLC, Signafor's lead investor.
"His knowledge of the industry, understanding of the technology, management experience and high-level contacts will be a significant asset to our growing company. We are extremely pleased to have Mr. McKinney be a part of Signafor and are confident his impact will be positive and significant," shared Sham Chakravorty, Signafor's founder and President.
"The challenge, facing today's enterprises and service providers, is their lack of differentiation with their customers while being under significant pressure to reduce operational costs. Signafor's innovative IP switching and QoS technologies enable service providers to reduce costs, improve throughput while at the same time empowering them to define, provision and charge for services never before possible," noted McKinney. "Signafor's product offerings are uniquely poised to succeed in the marketplace today," he added.
Prior to Teligent, Mr. McKinney led Computer Science Corporation's (NYSE: CSC) telecommunications consulting practice. McKinney also serves on the board for TCSI, Inc. (NASDAQ: TCSI), The Carpe Diem Group, Inc. and Extent Technologies, Inc.

About Signafor:

Established in October 2000, Signafor licenses advanced IP switching and QoS technology solutions for the next-generation broadband Internet that enables enterprises and service providers to define and deliver multiple, differentiated services in real-time. The resulting benefit is unique service offerings, a significant improvement of throughput while notably reducing operational costs. For the first time, service providers can deliver content smart networks.

Signafor's high speed IP switching technologies, serving optical, copper and wireless media, enable the rapid convergence of voice, video and data onto a single, secure network at dramatically reduced costs. Its innovative solutions enable carriers, service providers and enterprises to offer their customers a high degree of differentiated services while at the same time giving them added tools to reduce network failure risks and congestion.

Signafor is pursuing technology and marketing partnerships with router manufacturers, VoIP vendors, wireless 3G infrastructure providers, enterprise network managers as well as service providers who need to establish value-added, high speed, converged media networks.