Introduction to the ARRIS Keystone ™ D5 ™ Digital Multimedia Termination System ™ (DMTS) High Performance Video QAM & M-CMTS QAM January 2006

2ARRIS Confidential & Proprietary Operators need a new generation of routing, processing, transport & management products at the HFC “Edge” network that : ○ Are based on open standards ○ Increase bandwidth & allow for its efficient use ○ Support fast introduction of new services ○ Dramatically lower the costs of delivering multimedia on-demand content The Emerging Needs of HFC Operators Video iPod

3ARRIS Confidential & Proprietary #1 Digital Video - MPEG2-TS QAM ­Long product lifetime ­Rapidly transitioning to IP transport ­Low cost per stream is a factor in VoD #2 Multi-Service – M-CMTS ­Many options for headend scaling ­Benefits large, routing oriented network architecture and IP MAN/RAN transport ­No HFC plant or CPE upgrades #3 Converged Service – DMTS ­Extends M-CMTS architecture to smaller hubs ­IP convergence cost savings benefits entire network + CPE Each new application is an extension of the preceding application QAM Application Sequencing

4ARRIS Confidential & Proprietary D5 DMTS Addresses 3 Market Spaces MPEG2-TS QAM Market will be first eclipsed by the M-CMTS and later by the DMTS Markets Relative Deployment Scale Digital Video - MPEG2-TS QAM 10 years of deployment history Multiple scaling options Rapidly transitioning to IP transport Long footprint lifetime Analog video via Cable >35 years Multi-Service – M-CMTS Large Headend scaling IP and MPEG2-TS Services DMTS All IP Services Hub level scaling

5ARRIS Confidential & Proprietary Metro Net IRDs Ad/DEAS Systems Network Management Systems PSI/SI Generation SMS System Billing System CA Systems Statistical Mux/Transcode r/Transrater Combine to HFC Edge VOD and Add Servers Local Encoder Resource Manager PCMM Manager Keystone D5 A/V and DSG messaging DHEI/ASI 10/100BaseT GbE IRTs Analog Mods RTE VOD and Add Servers Keystone™ D5™ DMTS™ configured with MPEG2 QAM Modules Plugs into HFC combining network with all other edge devices Supports Broadcast, Narrowcast, and Unicast MPEG2 applications QAMs are field upgradeable to M-CMTS QAMs MPEG2 Video QAM Application

The Keystone D5 DMTS for MPEG2-TS Applications Base Features of Releases & 2.0.2

7ARRIS Confidential & Proprietary Block Up-conversion of Four Downstreams onto one RF output ○ High density / Industry leading Redundant Power Supplies ○ AC or DC Front Panel GbE Digital Test Port Front Panel RS-232 CLI Port Front Panel LCD with Keypad Field Upgradeable / Configurable ITU J.83 Annexes A, B and C 8 Slot Modular Architecture ○ Allows Pay as you grow 4 GigE WAN Interfaces ○ Electrical or Optical Spare Network interface slot Rear panel loaded modules “Hot Swap” modules OAM&P Interface ○ (SNMP & XML support) D5 Video QAM Features

ARRIS Confidential & Proprietary8 QAM Module WAN Module GbE Backplane Redundant Power Supplies Fan Tray D5 - Exploded View

9ARRIS Confidential & Proprietary Edge-QAM Features 1.MPEG-2TS over GigE input ○ UDP port mapping 2.Compliance with Edge-QAM device specifications 3.DVB Simulcrypt/Common Scrambling 4.Multiplexing and Routing of SPTSs 5.Generation of MPTS tables ○ PAT, NIT, PMT,CAT 6.MPEG-2 TS Dejittering 7.Program Clock Reference (PCR) Correction 8.PID Remapping 9.PSI/SI Table Editing 10.IGMPv2 Importance 1.Metro transport going GigE 2.Direct replacement for standard Edge QAM devices 3.Support Open CAS Interface 4.VoD 5.Supports a multiplex of set top channel tables 6.Corrects for transport irregularities 7.Corrects for timebase differences between streams 8.Required for stream re-muxing 9.Remaps PIDs for re-broadcast 10.Multicast IP protocols for broadcast A comprehensive feature set for On Demand & Broadcast applications D5 Video QAM Functions

ARRIS Confidential & Proprietary10 D5 Key Value Points ○ Modularity: Deploy QAMs as bandwidth is required, “pay as you grow” ○ Industry Leading Density:  Up to 48 QAM channels in a 2 RU device  Up to 576 simultaneous CBR video streams delivered to current generation MPEG-2 STB ○ Flexible Channel Configurations: supports 8, 16, 24, 32, 40, or 48 QAM channels ○ Investment Protection: “SW Upgrade Only “ to achieve M-CMTS and DOCSIS 3.0 features ○ Service Migration: highly flexible modular design lets operators grow and change the mix of video service at a pace appropriate to their network and business needs ○ Extensibility: will accommodate next generation M-CMTS architectures, as well as the emerging needs for wideband DOCSIS ®

ARRIS Confidential & Proprietary11 D5 Redundancy Features 1.Power Supplies: Dual AC or DC 2.Cooling: Multiple Fans 3.Signal & Power Distribution: Midplane 4.Networking: WAN Module with Multiple GbE Links 5.RF: Multiple QAM Modules Unprotected Elements Monitor Card: No redundancy required, D5 can operate without it once the boot-up sequence is completed Front Panel: No critical functions, no redundancy required

12ARRIS Confidential & Proprietary Feature Value to Operator Vendor PortfolioBundled deals, CMTS capability provides path to DSG & M-CMTS Size (rack units)Density translates to Headend rack space & footprint MPEG MuxingRequired to handle MPEG-2 SPTS and DOCSIS Stream GroomingProvides optimum bit rate for every stream in real time Scrambling/EncryptionRequired for Conditional Access systems and content security QAM Mod & RF UCQAM Mod is a base feature, Integrated RF UC reduces cabling, lowers cost M-CMTS ModesProvides dynamic BW allocation, Flexible DS:US ratios MPEG-DS/RUA metric for stream density (more is better) Adjacent Channel Bonding Higher number of bonded channels drives density (good) & affects combining ratios Output Freq. RangeWide range ( MHz ) needed for flexibility in frequency planning ITU J.83 AnnexA=Europe and Asia, B= North + South America, C=Japan Dimensions (in inches)Size matters – depth may affect rack size required WeightHeavy units require rear supports or rack shelves Max PowerAffects cooling requirements for Headends / Hubs Feature & Values for GbE QAM

13ARRIS Confidential & Proprietary Highest density Edge QAM on the market Modular architecture allows flexible configurations ○ Cost effective for a variety of applications ○ Simple field upgrades for future IP multimedia processing requirements  DPI, SDB, etc The only platform with built-in or optional redundancy features for all single point of failure modes Extensible for M-CMTS Compliancy Keystone D5 Summary Supports MPEG2- TS & Embedded Proprietary Conditional Access High Port Density & GbE Networking Dramatically Reduce Costs Per Stream Modular / Flexible / Extensible / Redundant Architecture Optimizes Transport Resources & HFC Bandwidth Allocations