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Juniper Networks Announces Voice Enhancements to G10 Cable Networking Platform

G10 CMTS with M-series Internet Routers Delivers PacketCable™-based Voice Over IP

San Antonio, TX - June 4, 2002 - Juniper Networks, Inc. (Nasdaq: JNPR), a leading provider of trusted infrastructures for the New Public Network, today announced new enhancements to its G10 cable modem termination system (CMTS) to support revenue-generating Voice over Internet Protocol (VoIP) services.

Juniper Networks will demonstrate the enhanced G10 CMTS with carrier-class VoIP at Booth #1060 at SCTE's Cable-Tec Expo June 5-6.

Based on CableLabs® DOCSIS™ 1.1 and interim PacketCable specifications, the enhanced G10 CMTS with Juniper Networks M-series Internet routers allows cable operators to efficiently deliver advanced Internet Protocol (IP) services, including VoIP through two-way cable plants. The G10 CMTS, paired with best-in-class M-series Internet routers, offers interoperability with call management servers, media gateways, billing and provisioning systems and multimedia terminal adapters.

"Internet Protocol networks are emerging as viable platforms for the reliable delivery of both two-way data and voice traffic. The flexibility of IP networks will allow cable operators to deliver a host of unique value-added VoIP features including integrated voice mail, e-mail messaging and real-time provisioning of additional phone lines using cable connections," commented Michael Harris, president of broadband research firm Kinetic Strategies. "The deployment of VoIP requires expertise throughout the entire IP network, and the ability to deploy end-to-end IP infrastructure solutions, not just the CMTS broadband access aggregation point."

Juniper Networks proven and trusted M-series routers and JUNOS Internet software are deployed in many of the largest backbone network infrastructures in the world, including VoIP deployments at service providers such as Fusion Communications Corp. (www.juniper.net/solutions/profiles/fusion.html) Juniper Networks M-series, and the recently introduced T-series routers, also support VoIP through intelligent routing and packet classification, robust quality of service (QoS) for low delay and jitter and multiprotocol label switching (MPLS) traffic engineering for congestion free networks.

Proven Availability from the CMTS to the End-user

Juniper Networks newest enhancements offer cable operators packet-based voice services with a high level of service availability from the CMTS to the end-user. While the G10 CMTS provides 1:N redundancy for all modules, its new feature set takes IP service reliability to a new level. The G10 CMTS continuously monitors flow, channel and port statistics to ensure the highest link quality and automatically correct impairments. Its advanced noise cancellation technique digitally suppresses ingress noise, enabling the G10 to operate at a C/I of 3dB versus legacy solutions that fail at 28 dB. The Intelligent Channel Optimizer dynamically adapts modulation, symbol rate and center frequency to eliminate other severe impairments. The enhanced G10 CMTS ServiceGuard Management System troubleshoots ingress and other impairments in the return path, including the CMTS and cable modems.

The G10 CMTS' VoIP capabilities are enhanced by the system's superior radio frequency (RF) performance. Through the Broadband Cable Processor, a purpose-built DOCSIS-compliant silicon developed by Juniper Networks, the G10 CMTS reliably demodulates 16 quadrature amplitude modulation (QAM) in conditions where other solutions can only demodulate quadrature phase shift keying (QPSK). The enhanced G10 CMTS supports more than four times the amount of voice calls than legacy CMTS offerings by combining eight DOCSIS modules per 13U chassis, with each module supporting four downstream channels and 16 upstream channels for 2.5 Gbps of throughput per chassis. Its advanced scheduler and QoS features ensure VoIP quality by supporting per flow classification for 128,000 service flows per chassis and strict priority queuing to minimize delay and jitter. End-to-end QoS information is communicated to M-series routers by Diff-Serv packet marking techniques.

The G10 CMTS from Juniper Networks is sold exclusively in North America by Scientific-Atlanta as the Prisma G10 CMTS.

About Juniper Networks, Inc.

Juniper Networks leads the industry in turning network innovation into the reliable delivery of core, edge, mobile and cable Internet services at scale for the New Public Network. Headquartered in Sunnyvale, California, Juniper Networks offers additional information on its product and service offerings at www.juniper.net.

Juniper Networks is registered in the U.S. Patent and Trademark Office and in other countries as a trademark of Juniper Networks, Inc. G10, JUNOS, M-series, ServiceGuard, and T-series are trademarks of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners.