1. Introduction to Cable Telephony Larry Greenstein Director of Product Management Nuera Communications www.nuera.com

2. Cable Telephony Technology –CBR (Constant Bit Rate) –Hybrid VoIP –PacketCable VoIP CableLabs/PacketCable Market Forecast Business Case elements

3. Circuit-Switched Voice CBR (Constant Bit Rate) NIU: Network Interface Unit HDT: Headend Digital Terminal CMTS: Cable Modem Termination System

4. Broadband Access (Hybrid VoIP) PacketCable LCS network architecture Over Cable/HFC, DSL, Fiber, Wireless Provides same features and user experience as legacy networks Uses legacy billing systems, announcement servers and OSSs Router DSLAM CMTS Cable Modem DSL Modem Local Exchange GR-303/V5.2 Gateway LCS: Line Control Signaling PSTN

5. PacketCable Architecture Router Managed IP Backbone CMTS eMTA SYSLOG RKS DNS DHCP SNMP TFTP KDC Media Player Controller Gate Controller Call Agent Media Player PSTN Media Gateway Controller Media Gateway Signaling Gateway Call Management Server Media Servers PSTN Gateways HFC RKS: Record Keeping Server KDC: Key Distribution Center DNS: Domain Name Server DHCP: Dynamic Host Configuration Protocol SNMP: Simple Network Management Protocol TFTP: Trivial File Transfer Protocol SYSLOG: Event logging protocol eMTA: Embedded Multimedia Terminal Adapter OSS Servers SS7

6. PacketCable VoIP PacketCable Full VoIP network architecture –Softswitch (CMS/MGC) control Platform for next generation services: IP centrex, unified messaging, “ follow me ” IP Network SS7 CMS/MGC LE Switch PSTN Media Servers Broadband Access Network TGCP BTX-8 NCS NCS: Network Call Signaling TGCP: Trunking Gateway Control Protocol CMS: Communications Management Server MGC: Media Gateway Controller

7. Cable Television Laboratories, Inc. (CableLabs) –Founded in 1988 by members of the cable television industry –Funded by the monthly subscription fees paid by members as well as by testing-related fees. Nonprofit research and development consortium –Pursues new cable telecommunications technologies –Helps cable operators integrate those technical advancements into their business objectives. Serves the cable television industry by: –Researching and identifying new broadband technologies –Authoring specifications –Certifying products –Disseminating information WWW.CableLabs.com

8. PacketCable Project PacketCable is a CableLabs-led initiative aimed at developing interoperable interface specifications for delivering advanced, real-time multimedia services over two-way cable plant. VoIP is the first service identified for delivery over the PacketCable architecture. WWW.PacketCable.com

9. Addressable Cable Telephony Market Media Gateway Potential and Sales

10. Hybrid VoIP pricing EMTA $100/sub CMTS $60/sub PSTNInternet Broadband IP Network Circuit Switch GW $40/sub

11. PacketCable VoIP pricing EMTA $100/sub CMTS $60/sub PSTNInternet Broadband IP Network CLASS 5 Softswitch $50/sub GW $40/sub

12. Thank You! Larry Greenstein Director of Product Management Nuera Communications 10445 Pacific Center Court San Diego, CA 92121 +1 (858) 625-2400 LGreenstein@nuera.com http://www.nuera.com