Tollgrade's VoIP-enabled DOCSIS(TM)-based Transponders 'Verified for Interoperability' with PacketCable(TM) Release 1.0

Industry's Only HFC-based VoIP Test Point Now in Trials

PITTSBURGH, May 31 / Tollgrade Communications, Inc. (NASDAQ:TLGD), a leader in communications test and management solutions for telecom and cable broadband service providers, announced that its Cheetah(TM) CMD Series DOCSIS®-based Transponders have been awarded PacketCable(TM) Release 1.0 "Verified for Interoperability" by CableLabs® in the recently completed Certification Wave 42. Tollgrade DOCSIS-based transponders, widely deployed to monitor power supply status and performance within the HFC network, can now emulate a subscriber's E-MTA. This enables cable operators to "actively sample" VoIP service performance by verifying both VoIP signaling and call quality from an HFC-based test point.

"The Cheetah CMD Series Transponders provide outstanding visibility into the multi-layered HFC network," stated Greg Quiggle, Tollgrade's Executive Vice President of Marketing. "By emulating a subscriber E-MTA, Tollgrade currently provides the industry's only known VoIP service assurance solution that originates and terminates calls at HFC-based test points within a PacketCable network. Doing so replicates the customer's VoIP service experience through the use of PacketCable telephony protocols - including Network Call Signaling (NCS), Dynamic Quality of Service (DQoS), and Security. This capability enables cable operators to remotely and accurately isolate CPE, HFC, Ethernet/IP, CMS and Gateway troubles - making the delivery of consumer VoIP services more reliable and profitable."

Tollgrade's VoIP-enabled DOCSIS-based transponders are currently in active customer trials.

Brian Partridge, Senior Analyst at Yankee Group, stated, "This is a timely release for Tollgrade as cable/MSO operators will now have access to bi- directional, DOCSIS-based VoIP emulation and testing at a time when the highly competitive broadband players are building out their VoIP subscriber base. The VoIP-enabled transponder can help cable/MSO operators efficiently manage their VoIP infrastructure requirements."

Tollgrade's Cheetah product line provides HFC, DOCSIS, and IP network fault/performance monitoring solutions that enable cable operators to significantly increase their plant operation efficiency. Cheetah systems are designed to meet all of the cable operator's monitoring demands and provide efficient end-to-end solutions that notify users of equipment failure instantly, warn of impending service interruptions and verify equipment status remotely.

About Tollgrade

Tollgrade Communications, Inc. is a leading provider of network service assurance products and services for centralized test systems around the world. Tollgrade designs, engineers, markets and supports centralized test systems, test access and status monitoring products, and next generation network assurance technologies for the broadband marketplace. Tollgrade's customers range from the top RBOCs (Regional Bell Operating Companies) and Cable providers, to numerous independent telecom, cable and broadband providers around the world. Tollgrade's network testing, measurement and monitoring solutions support the infrastructure of cable and telecom companies offering current and emerging triple play services. Tollgrade, headquartered near Pittsburgh in Cheswick, Pa., and its products and customer reach span over 200 million embedded access lines, more than any other test and measurement supplier. For more information, visit Tollgrade's web site at

Source: Tollgrade Communications, Inc.

CONTACT: Bob Butter, Corporate Communications of Tollgrade,
+1-412-820-1347, or +1-412-736-6186, or

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