Abbreviations and Acronyms µsec Microsecond 1xRTT Single Carrier Radio Transmission Technology 2G 2nd Generation 3DES Triple Data Encryption Standard 3DTV Three Dimensional Television 3G 3rd Generation 3GPP Third Generation Partnership Project 3GPP2 Third Generation Partnership Project 2 4C Consortium of Intel, IBM, Matsushita, and Toshiba 4G Fourth Generation 4WM Four Wave Mixing 5C Consortium of Intel, Sony, Matsushita, Toshiba, and Hitachi 8VSB 8-level Vestigial Sideband A/D Analog to Digital A/D/A Analog to Digital to Analog A/O Additional Outlet A/V Audio/Video AAA Authentication, Authorization, and Accounting AAAA American Association of Advertising Agencies AAC Advanced Audio Codec/Coding AACS Advanced Access Content System AAS Adaptive Antenna System ABC American Broadcasting Corporation ABSBH Average Busy Season Busy Hour AC Access Category AC Alternating Current AC_BE Access Category – Best Effort AC_BK Access Category – BacKground AC_VI Access Category – VIdeo AC_VO Access Category – VOice AC3 Adaptive Transform Coder 3 AC-3 Audio Coding Revision 3 ACAP Advanced Common Application Platform ACD Automated/Automatic Call Distribution ACK Acknowledge(ment) ACL Access Control List ACL Applications Connection-Less ACM Adaptive Coding and Modulation ACORN A Classification of Residential Neighborhoods ACS Ad Content Service AD Activity Detection ADI Asset Distribution Interface ADI Asynchronous Digital Interface Ad-ID Advertising-Digital Interface ADM Ad Management Service ADM Add/Drop Multiplexing ADPCM Adaptive Differential Pulse Code Modulation ADS Ad Decision Service ADSL Asymmetric Digital Subscriber Line ADSL2 Asymmetric Digital Subscriber Line and Annex J (Supports higher bandwidth) ADSL2+ Asymmetric Digital Subscriber Line and Annex L (Supports higher bandwidth) AES Advanced Encryption Standard AF Abstract Framework

AF Application Function AF Assured Forwarding AGC Automatic Gain Control Agg-PE Aggregation Provider Edge AGI Attachment Group Identifier AGW Access Gateway AI Artificial Intelligence AIFS Arbitration InterFrame Space AIN Advanced Intelligent Network AIS Alarm Indication Signal AIT Application Information Table AKA Authentication and Key Agreement ALG Application Layer Gateway AM Amplitude Modulation AM Application Manager AMA Automatic Message Accounting AMI Alternate Mark Inversion AMOL Automated Measurement Of Lineup A-MPDU Aggregated MAC (Media Access Control) Protocol Data Unit AMPS Advanced Mobile Phone Service AMS Asset Management System ANA Association of National Advertisers ANC Announcement Controller ANF Aggregate Noise Factor ANP Announcement Player ANSI American National Standards Institute AOD Advertising On Demand AOL America On-Line AoR Address of Record AP Access Point AP Automatic Power APD Avalanche Photo Diode API Application Programming Interface APM Alternate Provisioning Mode APON ATM Passive Optical Network APON ATM-based Passive Optical Network Apps Applications APS Analog Protection System APSK Amplitude Phase Shift Keying A-RACF Access – Resource and Admission Control Function ARCNET Attached Resource Computer Network ARF Advertising Research Foundation ARIB Association of Radio Industries and Businesses ARIN American Registry of Internet Numbers ARP Address Resolution Protocol ARPU Average Revenue per Unit (or User) ARQ Automatic Repeat Request AS Application Server AS Autonomous System ASAP As Soon As Possible ASCII American Standard Code for Information Interchange ASD Authorized Service Domain ASF Advanced Streaming Format ASF Advanced Systems Format ASI Asynchronous Serial Interface AsiaPac Asia Pacific

ASIC Application-Specific Integrated Circuit ASM Any Source Multicast ASM Asset Management System ASN Access Service Network ASP Average Selling Price ASP Application Service Provider ASR Access Switch Router ASTB Advanced Set-Top Box ASTD American Society for Training and Development ASX Advanced Stream Redirector AT Advanced Technology ATA Advanced Technology Attachment ATDMA Advanced Time Division Multiple Access A-TDMA Advanced Time Division Multiple Access ATDMA Asynchronous Time Division Multiple Access ATE Automated Test Environment ATIS Alliance for Telecommunications Industry Solutions ATM Asynchronous Transfer Mode AToM Any Transport Over MPLS ATP Adaptive Transmission Protocol ATSC Advanced Television Systems Committee ATTN Attenuator AUP Acceptable Use Policy AV Audio/Video AV Audiovisual AVC Advanced Video Coding AVI Advanced Video Interface AVI Audio Video Interleave AWGN Additive White Gaussian Noise AWS Advanced Wireless Services AWT Abstract Window(ing) Toolkit B2BUA Back-to-Back User Agent B8ZS Binary 8 Zero Substitution BA Behavioral Aggregate BAF Bellcore AMA Format BB Baseband BB Broadband BBTV Broadband Television BC Broadcast BC/NC Broadcast/Narrowcast BC-BS Backwards-Compatible Broadcast Services BCID Billing Correlation Identifier BDF Broadband Digital Forward BDR Baseband Digital Reverse BE Best Effort BER Bit Error Rate BERT Bit Error Rate Test BFS Broadcast File System BGCF Breakout Gateway Control Function BGF Border Gateway Function BGP Border Gateway Protocol BGP-VPLS Border Gateway Protocol-Virtual Private LAN Service BGW Border Gateway BICSI Building Industry Consulting Services International BIF Binary Interchange Format BIG Broadband Integrated Gateway

BITS Building Integrated Timing Supply bits/sym Bits per Symbol BIU Broadband Interface Unit BMS Business Management System BNN Bit-Error-Rate in the Noise Notch BoD Broadcast on Demand BOM Bill of Material BOSS Back Office Support System BP Boundary Point BP@L1b Baseline Protocol at Level 1b BPF Band-Pass Filter BPI Baseline Privacy Interface BPI+ Baseline Privacy Interface Plus BPL Broadband over Power Lines BPON Broadband Passive Optical Network B-PON Broadband Passive Optical Network bps Bits Per Second BRAS Broadband Remote Access Server B-RAS Broadband Remote Access Server BRI Basic Rate Interface BRI Brand Rating Index BRS Broadband Radio Service BS Base Station BS Broadcast Services BSC Base Station Controller BSS Basic Service Set BSS Business Support System BTS Base Transceiver Station (Wireless Telephony) BTS Business Telecom Services BTSC Broadcast Television Systems Committee BTU British Thermal Unit BTU/hr British Thermal Unit Per Hour BW Bandwidth BW/QAM Bandwidth per QAM BYOI Bring Your Own Infrastructure C/N Carrier to Noise Ratio C/N0 Carrier-to-Noise-density Ratio CA Mgmt Conditional Access Management CA Call Agent CA Conditional Access CA Content Archive CAB Cable Advertising Bureau CAC Call Admission Control CAC Connection Admission Control CAC Connetiont Admission Control CAD Computer Aided Design CAGR Compound Annual Growth Rate CALA Central America and Latin America CALEA Communications Assistance for Law Enforcement Act CAN Cellular Access Network Canitec Camara Nacional de la Industria Television por Cable CapEx Capital Expenditure CAPMAN Capacity Management CAS Channel Associated Signaling CAS Conditional Access Server CAS Conditional Access System

CAT Conditional Access Table CAT5 Category 5 CATV Community Antenna Television (or Cable Television) CB Channel Bonding CB Citizen Band CBI Character-Based Interface CBR Constant Bit Rate CBT Computer Based Testing (or Training) CBT Core-Based Trees CC Convolutional Coding CCC Circuit Cross Connect CCCF Call Continuity Control Function CCCM CPE Controlled Cable Modem CCDF Complementary Cumulative Distribution Function CCI Content Control Information CCI Copy Control Information CCK Complimentary Code Keying CCM Channel Change Message CCM Constant Coding and Modulation CCNR Completion of Calls No Reply CCP Channel Change Protocol CCR Call Completion Ratio CCS Centum Call Seconds CCS Common Channel Signaling CCS Completed Call Seconds CD Chromatic Dispersion CD Compact Disc CDC Changed Data Capture CDC Connected Device Configuration CDF Channel Definition Format CDF Charging Data Function CDMA Code Division Multiple Access CDN Content Delivery Network CDN Content Distribution Network CDPD Cellular Digital Packet Data CDR Call Detail Record CD-ROM Compact Disk-Read Only Memory CDS Content Delivery System CE Consumer Electronics CE Content Entity CE Customer Equipment CEA Consumer Electronics Association CEBus Consumer Electronic Bus CENTREX CENTRal office EXchange service CEO Chief Executive Officer CEP Cable Entry Point CEPCA Consumer Electronics Powerline Communication Alliance CER Codeword Error Ratio CES Circuit Emulation Service CESoPSN Circuit Emulation over Packet Switching Networks CESoPSN Circuit Emulation Service over Packet Switched Network CE-VLAN Carrier Ethernet – Virtual Local Area Network CFO Chief Financial Officer CFP Contention Free Periods CG Character Generator CGMS-A Copy Generation Management System - Analog

CH CableHome™ CH CableHome™ Host Ch Channel CHILA Cable Host Interface Licensing Agreement CIDR Classless InterDomain Routing CIFS Common Internet File System CIM Common Information Model CIN Call Indentity Number CIN Converged Interconnect Network CINIT Centro de Investigacion e Innovacion en Telecomunicaciones (CINIT) CIR Committed Information Rate CIT Constrained Image Trigger CLASS Custom Local Area Signaling Services CLDC Connected(ion) Limited Device Configuration CLE Customer Located Equipment CLEC Competitive Local Exchange Carrier CLI Command Line Interface CLI Cumulative Leakage Index CLID Caller Identification CLR Common Language Run-time CLV Consumer Lifetime Value CM Cable Modem CMCI CM (Cable Modem) To CPE (Customer Premises Equipment) Interface CMIM Cable Modem Interface Mask CMLA Content Management License Administrator CMOS Complimentary Metal-Oxide Semiconductor CMS Call Management Server CMS Call Management Server CMTS Cable Modem Termination System CNAM Calling NAMe CNAM Calling Name delivery CNI Customer-to-Network Interface CNIR Carrier-to-Noise plus Interference Ratio CNIR Carrier-to-Noise/Ingress Ratio CNR Carrier-to-Noise Ratio CO Central Office CO Connection Oriented CODEC Coder/Decoder Codec Encoder/Decoder COLD Central Office Layout Design Const Constellation COPS Common Open Policy Service CORBA Common Object Request Broker Architecture CoS Class of Service COT Central Office Terminal CP Copy Protection CPD Common Path Distortion CPE Customer Premises Equipment CPE Customer Provided Equipment CPH Cost Per Household CPM Cost per Thousand Impressions CPMS Copy Protection Management System CPPM Copy Protection for Prerecorded Media CPRM Content Protection for Recordable Media CPS Content Protection System CPS Cost Per Subscriber

CPTWG Copy Protection Technical Working Group CPU Central Processing Unit CQ-MOS Conversational Quality Mean Opinion Score CQoS CableHome™ Quality of Service CQP CableHome™ QoS Portal CRA Contention Resolution Algorithm CRC Cyclic Redundancy Check CRG CableHome™ Residential Gateway CRL Certificate Revocation List CR-LDP Constraint-based Label Distribution Protocol CRM Customer Relationship Management CS Circuit Switch(ed) CSC Call Session Controller CSCF Call Session (or State) Control Function CSH Central Switch Homerun CSMA/CA Carrier Sense Multiple Access with Collision Avoidance CSMA/CD Carrier Sense Multiple Access with Collision Detection CSO Composite Second Order CSoD Commercial Services over DOCSIS® CSR Customer Service Representative CS-RZ Carrier-Suppressed Return-to-Zero CSS Content Scramble(ing) System CSU Channel Service Unit CSV Comma Separated Value CTAM Cable & Telecommunications Association for Marketing CTB Composite Triple Beat CTC Convolutional Turbo Coding CTIA Cellular Telecommunications and Internet Association CTO Chief Technology Officer CTR Customer Trouble Report CW Codeword CW Continuous Wave CWDM Coarse Wavelength Division Multiplexing CWM Common Warehouse Metamodel CY Calendar Year D&B Dun and Bradstreet D/S Downstream DA Destination Address DAC Digital Addressable Controller DARPA Defense Advanced Research Projects Agency DAS Direct Attached Storage DAT Digital Audio Tape DAT DOCSIS® Set-top Gateway Address Table DAVIC Digital Audio Visual Council DB Database dB Decibel DBA Dynamic Bandwidth Allocation dBc Decibel Referenced to the Carrier dBm Decibel milliwatt dBmV Decibel milliVolt dBmVrms Decibel milliVolt root mean square DBPSK Differential Binary Phase Shift Keying DBS Direct Broadcast Satellite DC Direct Current DC Directional Coupler DC Dispersion Compensator

DCA Digital Cable Application D-CAPMAN Dynamic Capacity Management DCAS Digital Certificate Access Server DCAS Downloadable Conditional Access System DCC Data Communication Channel DCC Dynamic Channel Change DCD Disconnection Delay DCD Downstream Channel Descriptor DCF Dispersion Compensating Fiber DCF Distributed Coordination Function DCM Dispersion Compensation Module DCP Device Control Protocol DCR Digital Cable Ready DCS Digital Cross-connect System DCT Digital Communications (Cable) Terminal DCT Discrete Cosine Transform DDNS Dynamic Domain Name Service DDoS Distributed Denial of Service DE Default DE Discard Eligible DeCSS Defeat Content Scrambling System DEN Directory-Enabled Networking DENI Digital Entertainment Networking Initiative DEPI DOCSIS External Physical Interface DES Data Encryption Standard DES Digital Encryption Standard DF Delivery Function DFAST Dynamic Feedback Arrangement Scrambling Technique DFB Distributed Feedback DHCP Dynamic Host Configuration Protocol DHCPv6 Dynamic Host Configuration Protocol Version 6 DHCT Digital Home Communications Terminal DHEI DigiCable Headend Expansion Interface DHWG Digital Home Working Group DIA Direct Internet Access DIBA DOCSIS IPTV Bypass Architecture DiffServ Differential Services DiffServ Differentiated Services DiffServ-TE Differentiated Services – Traffic Engineering Div Division DIX DEC-Intel-Xerox DL Downlink DLCI Data Link Connection Identifier DLL Data Link Layer DLNA Digital Living Network Alliance DM Degraded Modem DM Dispersion Mitigation DMA Demographic Market Area DMA Designated Marketing Area DMC Dual Modem Cards DMCA Digital Millennium Copyright Act DMH Degraded Modem Hours DML Direct Modulated Distributed Feedback Laser DMP Digital Media Project DMPT DOCSIS MPEG Transport D-MPT DOCSIS MPEG Transport

DNCS Digital Network Control System DNS Domain Name Server/Service DOCSDIAG DOCSIS Diagnostic Program DOCSIS Data over Cable Service Interface Specifications DOCSIS® Data-Over-Cable Service Interface Specifications DOCSIS®-RFI DOCSIS® Radio Frequency Interface DoD Department of Defense DoS Denial of Service DPI Deep Packet Inspection DPI Digital Program Insertion DPON Deep-Fiber Passive Optical Network DPON DOCSIS over Passive Optical Network DPSK Differential Phase Shift Keying DPT Dynamic Packet Transport DQoS Dynamic Quality of Service DQPSK Differential Quadrature Phase Shift Keying DRAM Dynamic Random Access Memory DRFI Downstream Radio Frequency Interface DRM Digital Rights Management DS Digital Signal DS Downstream DS0 Digital Signal 0 (zero) DS1 Digital Signal 1 DS3 Digital Signal 3 DSA Dynamic Service Add DSA-ACK Dynamic Service Add - Acknowledgement DSA-REQ Dynamic Service Add – Request DSA-RSP Dynamic Service Add - Response DSCP Differentiated Service Code Point DSG DOCSIS Set-top Gateway DSID Downstream Service Identifier DSL Digital Subscriber Line DSLAM Digital Subscriber Line Access Multiplexer DSLR Digital Signal Lens Reflex DSM Digital Storage Media, DNCS Session Manager DSM-CC UN Digital Storage Media Command and Control User-to-Network DSM-CC Digital Storage Medium Command and Control DSP Digital Signal Processor(ing) DSSS Direct Sequencing Spread Spectrum D-STB Digital Set-Top Box DSU Data Service Unit DS-x Digital Signal (level) DSX Digital Signal Crossconnect DSx Dynamic Service Change DTCP Digital Transmission Content Protection DTCP/5C Digital Transmission Content Protection/5 Companies DTD Dial Tone Delay DTE Data Terminal Equipment DTH Direct To Home DTI DOCSIS Timing Interface DTMF Dual Tone Multi-frequency DTV Digital Television DUN Dial-Up Networking DUT Device Under Test DV Digital Video DVB Digital Video Broadcast(ing)

DVB-ASI DVB (Digital Video Broadcast) Asynchronous Serial Interface DVB-DSNG DVB (Digital Video Broadcast) Digital Satellite News Gathering DVB-H/T Digital Video Broadcast –Handheld/Terrestrial DVB-MHP Digital Video Broadcast Multimedia Home Platform DVB-RCS DVB (Digital Video Broadcast) Return Channel via Satellite DVB-S DVB (Digital Video Broadcast) Standard DVD Digital Versatile Disc DVD+R Recordable Digital Versatile Disc DVD+RW Rewritable Digital Versatile Disc DVDCCA Digital Versatile Disc Copy Control Association DVI Digital Video Interface DVMRP Distance Vector Multicast Routing Protocol DVR Digital Video Recorder DVS Digital Video Standard DVS Digital Video Subcommittee DWDM Dense Wavelength Division Multiplex E-1 European format for digital transmission (Equivalent to the North American Digital Hierarchy T-1) E²R End-to-End Reconfigurability EA-DFB Electro-Absorption Modulator Integrated Distributed Feedback Laser EAP Extensible Authentication Protocol EAS Emergency Alert System EBIF Enhanced (TV) Binary Interchange Format eBIF Enhanced Binary Interchange Format EBITDA Earnings Before Interest, Taxes, Depreciation, and Amortization eCM Embedded Cable Modem ECM Entitlement Control Message ECM:EPS Embedded Cable Modem: Embedded Portal Option ECN Engineering Change Notification ECO Engineering Change Order ECR Efficient Consumer Response ECR Engineering Change Request EDC Electronic Dispersion Compensator EDCA Enhanced Distributed Channel Access EDFA Erbium Doped Fiber Amplifier EDGE Enhanced Data Rates for Global Evolution eDOCSIS™ Embedded Data-Over-Cable Service Interface Specifications EF Expedited Forwarding EFM Ethernet in the First Mile EFMS Error Free Milliseconds EFS Error Free Seconds EFSR Error Free Seconds Ratio EHDR Extended Header EIA Electronics Industry Association EIC Entertainment, Information, and Communications EIR Excess Information Rate EIRP Effective Isotropic Radiated Power EIS/SCS Event Information Scheduler/SimulCrypt Synchronizer ELA Ethernet Line Aggregation E-LAN Ethernet Local Area Network E-LINE Ethernet Line E-LSP EXP-Inferred-PSC Label Switch Path EM Element Manager EMEA Europe, Middle East and Asia EMI Electro-Magnetic Interference EMI Encryption Mode Indicator

EML Externally Modulated Laser EMM Entitlement Management Message EMS Element Management System eMTA Embedded Multimedia Terminal Adapter EMx Element Manager X ENDEC Encode/Decode ENM Estimated Noise Margin ENR Encryption Not Required ENUM Electronic Number Mapping ENUM Electronic Numbers ENUM Telephone Number Mapping E-O Electrical-Optical EoD Entertainment on Demand EoD Everything on Demand EOL End of Line EoMPLS Ethernet over MPLS EoRPR Ethernet over Resilient Packet Ring EoSonet Ethernet over SONET EP End Point EPG Electronic Program Guide EPL Ethernet Private Line EP-LAN Ethernet Private – Local Area Network EPN Encryption Plus Nonassertion EPON Ethernet Passive Optical Network EPRI Electric Power Research Institute EQ Equalization EQAM Edge QAM (Quadrature Amplitude Modulation) ER Edge Router ERIM Erasmus Research Institute of Management ERM Edge Resource Manager ERMI Electronic Resource Management Initiative ERT-VR Extended Real Time-Variable Rate ES Elementary Stream ES Errored Seconds ES Exclusive Session ES/N0 Energy per symbol-to-Noise density Ratio eSAFE Embedded Service/Application Functional Entity ESC Embedded Signaling Channel ESCON Enterprise System Connection ESCON/FC Enterprise System Connection/Fiber Channel ESF Extended SuperFrame ESM EOD Server Manager ESP Encapsulating Security Payload ESR Error Seconds Ratio eSTB Embedded Set-Top Box ET (SCTE’s ) Emerging Technologies Conference eTOM enhanced Telecom Operations Map ETSI European Telecommunications Standards Institute ETTH Ethernet To The Home ETTx Ethernet To The x (end point) eTV Enhanced Television ETV Enhanced Television EVA Error Vector Analysis EVC Ethernet Virtual Circuit EVDO Evolution Data Optimized EVM Error Vector Magnitude

EVPL Ethernet Virtual Private Line EVPL Ethernet Virtual Private Line EVPLAN Ethernet Virtual Private Local Area Network EXC Electronic Cross Connect EX-MOD Externally Modulated EXP Experimental FAQ Frequently Asked Question FastE Fast Ethernet FBI Federal Bureau of Investigation FC Fibre Channel FC-AL Fiber Channel – Arbitrated Loop FCAPS Fault, Configuration, Accounting, Performance and Security FCC Federal Communications Commission FCP Fibre Channel Protocol FCRC Fragment Cyclic Redundancy Check FCS Frame Check Sequence FDC Forward Data Channel FDD Frequency Division Duplex FDDI Fiber Distributed Data Interface FDM Frequency Division Multiplexing FE Fast Ethernet FE Fast Ethernet FEC Forward Error Correction FEC Forwarding Equivalence Class FF Fast Forward FFT Fast Fourier Transform FGPS FEC, Guard time, Preamble, Stuffing bytes FHCS Fragment Header Check Sequence FHSS Frequency Hopping Spread Spectrum FICON Fiber Connection FIFO First In-First Out FiOS Fiber Optic System(s) FIR Finite Impulse Response FLR Frame Loss Ratio FLS Frame Loss Seconds FM Frequency Modulation FMC Fixed Mobile Convergence FN Fiber Node FOADM Fixed Filter Optical Add/Drop Multiplexer FOD Free on Demand FoD Free Video On Demand FOSC Fiber Optic Splice Closure FP Fabry-Perot FQDN Fully Qualified Domain Name FR Fiber Ring FR Frame Relay FRAG Fragmentation Freq Resp Frequency Response FRR False Rejection Rate FRR Fast Re-Route FSAN Full Service Access Network FS-CWDM Full Spectrum - Coarse Wave Division Multiplexing FSK Frequency Shift Keying FSN Full Service Network FSO Free Space Optical FTP File Transfer Protocol

FTTB Fiber to the Business FTTC Fiber to the Curb FTTH Fiber to the Home FTTN Fiber to the Node FTTP Fiber to the Premises FTTR Fast Time To Repair FTTU Fiber to the User FTTW Fiber to the Wireless FTTWAP Fiber to the Wireless Access Point FTTx Fiber to the (endpoint) FTTX Fiber to the Exchange FUD Fear, Uncertainty and Doubt FW Firewall FWA Fixed Wireless Access FWM Four-Wave Mixing FXO Foreign eXchange Office FXS Foreign eXchange Station G2B Go2BroadbandSM GA Genetic Algorithm GaAs Gallium Arsenide GAC Genetic-based Admission Control GARP Generic Attribute Registration Protocol GB Gigabyte GB/s Gigabits per Second GbE Gigabit Ethernet GBIC Gigabit Interface Converter Gbps Gigabits per Second GC Gateway Controller GCC General Communications Channel GCF Breakout Gateway Control Function GDV Group Delay Variation GE RPR Gigabit Ethernet Resilient Packet Ring GE Gigabit Ethernet GEM Globally Executable MHP GE-PON Gigabit Ethernet Passive Optical Network GFL Group Flow Label(s) GFP Generic Framing Procedure GFP-F Generic Framing Procedure-Framed GFP-T Generic Framing Procedure-Transparent GFP-T Transparent Generalized Framing Procedure GGSN Gateway GPRS (General Radio Packet Service) Support Node GHz Gigahertz GigE Gigabit Ethernet GIGO Garbage In, Garbage Out GIS Geographic Information System GMPLS Generalized Multi-Protocol Label Switching GNT Grant GOP Group of Pictures GOPS Graphical Operations per Second G-PON Gigabit (Ethernet) Passive Optical Network GPON Gigabit Passive Optical Network GPRS General Packet Radio Service GPS Global Positioning System GQoS Generic Quality of Service GR Generic Requirement GRE Generic Routing Encapsulation

GRM Global Resource Manager GRP Gross Rating Point GRX GPRS (General Packet Radio Service) Roaming eXchange GS Global Server GSM Global System for Mobile (communications) GSMA Global System for Mobile communications Association GSN GPRS (General Packet Radio Service) Support Node GSRM Global Session & Resource Management GSRM Global System Resource Manager GTP GPRS Tunneling Protocol GTT Global Title Translation GUI Graphical User Interface GUPI Global Universal Provisioning Interface GVRP GARP VLAN Registration Protocol GW Gateway GWC Gateway Controller H&S Hub and Spoke HA High Availability HAL Hardware Abstraction Langugae HAN Home Area Network HAS Hardware Authentication Server HAVi Home Audio Video Interoperability HBO Home Box Office HCCA Hybrid Coordination function controlled Channel Access HCF Hybrid Coordination Function HCRP Hard Copy Cable Replacement HCS Header Check Sequence HD Hardware HD High Definition HDBH High-Day Busy Hour HDCP High-bandwidth Digital Content Protection HDD Hard Disk Drive HDLC High-Level Data Link Control HDMI High Definition Multimedia Interface HDPBH High Day Peak Busy Hour HD-PLC High Definition-ready Powerline Communications HDR Header HDSDI High Definition Serial Digital Interface HDT Host Digital Terminal HDTV High Definition Television HDVoD High Definition Video on Demand HD-VOD High Definition-Video on Demand HE Headend HEC Headend Controller HEM Headend Modem HFC Hybrid Fiber/Coax HGW Home Gateway HH HouseHold HHP Households Passed Hi-PHY High Performance Physical Layer HIS High-Speed Internet HIT Headend Interface Terminal HITS Headend In The Sky HLR Home Location Register HMS Headend Management System HMS Home Media Server

HMS Hybrid Management Sub-layer HN Home Network H-Net Home Network HNv1 Home Networking Version 1 HOD HBO On Demand HOM High-Order Modulation HomePNA™ Home Phoneline Networking Alliance HP Homes Passed H-PCRF Home Policy and Charging Rules Function HPF High Pass Filter HPLMN Home Public Land Mobile Network HPNA Home Phoneline Networking Alliance HPOV Hewlitt Packard Open View HQ Headquarters HQ High Quality HSA High Speed Access HSD High Speed Data HSDPA High Speed Downlink Packet Access HSI High-Speed Internet HSP Headset Profile HSS Home Subscriber Server HSS/HLR High Speed Serial/Home Location Register HSUPA High Speed Uplink Packet Access HTML HyperText Markup Language HTPC Home Theatre Personal Computer HTTP Hypertext Transfer Protocol HTTPS Hypertext Transfer Protocol Secure (sockets) HVAC Heating, Ventilation, and Air Conditioning HVPLS Hierarchical Virtual Private LAN Service HW Hardware Hz Hertz I/O Input/Output I/Q Incident/Quadrature IAD Integrated Access Device IAG Interactive Advertising Guidelines IAMS Intelligent Asset Management System IANA Internet Assigned Numbers Authority IAP Intelligent Access Point IB In-Band IBCF Interconnection Border Control Function ICB Independent Customer Builds ICC Instant Channel Change ICE Information and Content Exchange ICE Interactive Connectivity Establishment ICE Interchangeable Compressed Elements ICI Intercarrier Interface ICMP Internet Control Message Protocol I-CMTS Integrated Cable Modem Termination System ICO Incumbent Cable Operator ICS IMS Convergence Server i-CSCF Interrogating-Call State/Session Control(ler) Function ID Identification or Identifier IDAD Integrated DOCSIS® Access Device IDE Integrated Development Environment IDE Integrated Drive (or Device) Electronics iDEN Integrated Digital Enhanced Network

IDP Intrusion Detection and Prevention IDS Intrusion Detection System IDT Integrated Digital Terminal IEC International Electrotechnical Commission IEEE Institute of Electrical and Electronic Engineers IEEE-SA Institute of Electrical and Electronics Engineers Standards Association IETF Internet Engineering Task Force IF or I/F Intermediate Frequency IFC Initial First Cost IGMP Internet Group Management Protocol IGMP Internet Group Multicast Protocol IGMPv2 Internet Group Multicast Protocol, version 2 IGMPv3 Internet Group Multicast Protocol, version 3 IGP Interior Gateway Protocol IKE Internet Key Exchange ILEC Incumbent Local Exchange Carrier ILMI Interim Link Management Interface IM Instant Message(ing) IMA Inverse Multiplexing for ATM Imb Imbalance IMD Interception Mediation Device IMD Intermodulation Distortion Impls Resp Impulse Response IMS IP Multimedia Subsystem IMSI International Mobile Subscriber Identity IM-SSF IP Multimedia Services Switching Function IN Intelligent Network INA Interactive Network Adaptor INADDR ARPA Internet Address Address Routing Parameter Area I-NET Institutional Network Int Top Level in Internet Domain Name System IntServ Integrated Services IO Input Output IOS Internetworking Operating System IP Internet Protocol IPAT Internet Protocol Access Terminal IP-CAN Internet Protocol Cellular Access Network IP-CAN Internet Protocol Connectivity Access Network IPCDN IP over Cable Data Network IPDR Internet Protocol Data Record IPDR Internet Protocol Detail Record IPDR/SP Internet Protocol Detail Record/Streaming Protocol IPDT Internet Protocol Digital Terminal IP-Eth Internet Protocol-Ethernet IPG Interactive Program Guide IPG Inter-Packet Gap IPM Intelligent Policy Management IPMP Intellectual Property Management and Protection IPPV Impulse Pay per View IPR Intellectual Property Rights IPSec Internet Protocol Security IPSTB IP Set-Top Box IPT Internet Protocol Telephony IPTA Internet Protocol Transport Agreement IPTV Internet Protocol Television IPv4 Internet Protocol version 4

IPv6 Internet Protocol version 6 IPX Internetwork Packet Exchange IR Infrared IRD Integrated Receiver/Decoder IRI Industrial Reporting Inc IRM Intelligent Resource Management IRR Information Request Response IRR Internal Rate of Return IRT Integrated Receiver/Transcoder IS Information Systems ISA Integrated Services Architecture ISA Integrated Services Architecture ISC Internet Software Consortium ISCI Industry Standard Coding Identification iSCSI Internet Small Computer System Interface ISDN Integrated Services Digital Network ISI Inter-Symbol Interference IS-IS Intermediate System-to-Intermediate System ISM Industrial Scientific Medical ISMS Integrated Service Management System ISO International Organization for Standardization ISP Inside Plant ISP Internet Service Provider ISTP Internet Signaling Transport Protocol ISUP Integrated Services Digital Network User Part ISV Independent Software Vendor IT Information Technology ITA Interactive Television Association ITIL Information Technology Infrastructure Library ITU International Telecommunication Union ITU-T International Telecommunication Union Telecommunication (Standardization Sector) iTV Interactive Television IUC Interval Usage Code IVR Interactive Voice Response IVRM Intelligent Video Resource Manager IWF Internetworking Function IWF InterWorking Function IXC Interexchange Carrier IXP Internet Exchange Provider J2EE Java 2 Enterprise Edition J2ME Java 2 Mobile Edition JCP Java Community Process JMF Java Media Framework JNI Java Native Interface JPEG Joint Photographic Experts Group JSR Java Specification Request JTA Job Task Analysis JVM Java Virtual Machine JVT Java Vision Toolkit k Kilo = 1000 K12 Kindergarten through Grade 12 KB Kilobyte kb/s Kilobits per Second kbps Kilobits per Second KDC Key Distribution Center KDCF Korea Digital Cable Forum

kHz Kilohertz km Kilometer KPI Key Performance Indicator KSA Knowledge, Skills and Abilities ksym/s Kilosymbols Per Second ksym/sec Kilosymbols Per Second KTTA Korean Telecommunications Technology Association kVA 1000 Volt Amperes kW Kilowatt l Current L2 Layer 2 L2TP Layer-2 Tunnel(ing) Protocol L2TPv3 Layer-2 Tunnel(ing) Protocol Version 3 L2VPN Layer-2 Virtual Private Network LAN Local Area Network LATA Local Access and Transport Area LC Local Convergence LCAS Link Capacity Adjustment Scheme LCC Life-Cycle Cost LCP Local Convergence Point LCS Line Code Signaling LCT Local Craft Terminal LD Long Distance LDAP Lightweight Directory Access Protocol LDP Label Distribution Protocol LDPC Low Density Parity Check LDP-VPLS Label Distribution Protocol-Virtual Private LAN Service LDS Local Digital Switch LEA Law Enforcement Agency LEC Local Exchange Carrier LED Light Emitting Diode LEN Length LER Label Edge Router LERG Local Exchange Routing Guide LFA Long Format Advertising LH DWDM Long Haul Dense Wave Division Multiplex LIDF Lawful Intercept Delivery Function LIU Line Interface Unit LLC Logical Link Control LLD Logical Link Identifier L-LSP Label-Only-Inferred-PSC LSP LMDS Local Multipoint Distribution System LMI Link Management Interface LMP Link Management Protocol LNB Low Noise Block-downconverter LNP Local Number Portability LO Local Origination LOADM Lightweight Optical Add/Drop Multiplexer LOF Loss of Frame LOPS Loss of Packet Sync LOS Line Of Sight LOS Loss of Signal LovSAN a.k.a The Blaster Worm LP Long Play LPCM Linear Pulse Code Modulation LPF Local Policy Function

LQ-MOS Listening Quality Mean Opinion Score LRU Least Recently Used LSB Least Significant Byte LSP Label Switched Path LSP Layered Service Provider LSP Legacy Set-top Profile LSR Label Switch Router LTE Long Term Evolution LTS Long Term Storage LUA Last User Activity LVI Low Voltage Integrator LWP Low Water Peak M/U Modulator/Upconverter M13 Multiplexer for DS1 to DS3 signals M3UA MTP-3 User Adaptation mA Milliamp MAC Media Access Control MAC Moves, Adds, Changes MACD Moves, Adds, Changes, Deletes MAN Metropolitan Area Network MAP Main Audio Program MAP Mobility Application Protocol MARCOM Marketing & Communications MAS MPEG-Aware Switch MB Media Bundle MB Megabyte Mb/s Megabits per Second MB/s Megabytes per Second Mbaud Megabaud Mbits/sec Megabits per Second Mbps Megabits per Second MBps MegaByte per Second MBS Mission Bit Stream M-CMTS Modular Cable Modem Termination System MCP Mini-Carousel Protocol MC-PC Media Center Personal Computers MCPC Multiple Channel Per Carrier (Satellite transmission) MCTF Motion Compensated Temporal Filtering MD5 Message-Digest Algorithm MDA Model Driven Architecture MDN Mobile Directory Number MDR Mobile Digital Recorder MDU Multiple Dwelling Unit mDVR Multi-TV Digital Video Recorder MEA Mesh Enabled Architecture MEF Metro Ethernet Forum MEMS Micro-Electro-Mechanical Systems MEN Metro Ethernet Network MER Modulation Error Ratio MF Multifield MF Multifrequency MFM Multi-Flow Multicast MG Media Gateway MGC Media Gateway Controller MGC Media Gateway Controller MGCF Media Gateway Control Function

MGCP Media Gateway Control Protocol MGCP Media Gateway Control Protocol MGW Media Gateway MHP Multimedia Home Platform MHz Megahertz MIB Management Information Base MIC Message Integrity Check MIDI Musical Instrument Digital Interface MIDP Mobile Information Device Profile MIMO Multiple Input, Multiple Output MIMO Multiple Input, Multiple Output MIP Mobile IP MIPS Millions of Instructions per Second MITM Man in the Middle ML/MP Main Level/Main Profile MLB Medium-to-Large Business MLD Multicast Listener Discovery MLD Multicast Listener Discovery MLPPP Multi-Link Point to Point Protocol MM Multimedia MMA Media Management Agent MMD Multipoint Microwave Distribution MMG Massively Multiplayer Game MMI Man Machine Interface MMS Multimedia Message System MNO Mobile Network Operator MNO Mobile Network Operator MoCA Multimedia Over Coax Alliance MOD Movies on Demand MOF Meta Object Facility MOS Mean Opinion Score MOS-CQ Mean Opinion Score-Conversational Quality MOS-LQ Mean Opinion Score-Listening Quality MOSPF Multicast Open Shortest Path First MOSSI MCMTS Operations Support System Interface MOSSI Modular Open Source Software Institute MOU Minutes Of Use MP Media Player MP@ML Main Profile at Main Level MP2MP Multipoint to Multipoint MP3 MPEG (Moving Pictures Expert Group)-1, (Audio) Layer 3 MPBGP MultiProtocol Border Gateway Protocol MPC Master Planned Communities MPC Media Player Controller MPCP Multipoint Control Protocol MPDU MAC (Media Access Control) Protocol Data Unit MPEG Moving Pictures Expert Group MPEG-1 Moving Pictures Expert Group – Layer 1 MPEG-2 Moving Pictures Expert Group – Layer 2 MPEG2-TS MPEG2-Transport Stream MPEG-4 Moving Pictures Expert Group – Layer 4 MPEG-TS Moving Pictures Expert Group Transport Stream MPEGTS MPEG Transport Stream MPLS Multiprotocol Label Switching MPLS-eth Multiprotocol Label Switching-Ethernet MPLS-FRR MultiProtocol Label Switching Fast Reroute

MPLS-TE MPLS – Traffic Engineering MPLS-TE MultiProtocol Label Switching Traffic Engineering MPT MPEG Transport MPTS Multi-Program Transport Stream MQ Medium Quality M-QAM M-ary Quadrature Amplitude Modulation MRC Media Resource Center MRF Multimedia Resource Function MRFC Multimedia Resource Function Controller MRFP Multimedia Resource Function Processor MRTG Multi Router Traffic Grapher MS Media Servers ms Millisecond MS Mobile Station MSA Metropolitan Statistical Area MSA300 Standard 10 Gigabit Ethernet Connector MSB Most Significant Byte MSC Message Sequence Chart MSC Mobile Switching Center MSC Mobile Switching System MSDP Multicast Source Discovery Protocol msec Millisecond MSFT Microsoft Corporation MSO Multiple System Operator MSPP Multi-Service Provisioning Platform Msps Mega-Symbols per Second MSR Mesh Scalable Routing MSTP Multi Service Transport Platform MSTP Multiple Spanning Tree Protocol Msym Symbol Rate MTA Multimedia Terminal Adapter MTBF Mean Time Between Failures MTP-3 Message Transfer Part Level 3 MTTD Mean Time to Diagnose MTTF Mean-Time-To-Failure MTTR Mean Time To Repair MTTU Mean Time to Understand MTU Maximum Transmission Unit MUG Multimedia Home Platform Umbrella Group MULPI MAC and Upper Layer Protocol Interface MUX Multiplexer mV Millivolt MVNO Mobile Virtual Network Operator MVoD Mobile Video on Demand MVPD Multi-channel Video Programming Distributor MWG Media GateWay MWR Mesh Wireless Router MZ Mach-Zehnder NACK Negative Acknowledgement NANPA North American Numbering Plan Administration NAP Network Access Point NAPT Network Address and Protocol Translation NAPTR Naming Authority Pointer NAS Network Attached Storage NASS Network Attached Storage System NAT Network Address Translation

NBC-BS Non Backwards-Compatible Broadcast Services NBI Northbound Interface NCM Next Century Media NCS Network-based Call Signaling NCTA National Cable & Telecommunications Association ND Neighbor Discovery NDA Non-Disclosure Agreement NDE Network Dimensioning Engine NDMH Non-Degraded Modem Hours NDVR Network Digital Video Recorder NE Network Element NEBS Network Equipment Building System NeDS Network Domain Selection NEMA National Electrical Manufactures Association NEMS Network Element Management System NETBIOS Network Version of Basic Input/Output System NF Noise Figure NFM Narrowband FM NFS Network File System NG STB Next Generation Set Top Box NG Next Generation NG-L1 Next Generation Layer 1 NGN Next Generation Network NGNA Next Generation Network Architecture NGO Non-Government Organization NGOD Next Generation On Demand ngOSS Next Generation Operations Systems and Software ng-SONET Next Generation Synchronous Optical NETwork NI Network Interface NIC Network Interface Card NID Network Interface Device NIS Network Infrastructure Solutions NIST National Institute of Standards and Technology NIT Network Information Table NIU Network Interface Unit NLOS Non-Line of Sight NLS Network Layer Signaling nm Nanometer NmAccess Network Management Access NMC Network Media Center NMS Network Management System NNI Network-Network Interface NNOC National Network Operations Center NNTP Network News Transfer Protocol NOC Network Operations Center NP Number Portability NPAC Number Portability Administration Center n-PE Network (Device) Provider Edge NPR Noise Power Ratio NPV Net Present Value nPVR Network-based Personal Video Recorder nQAM Unspecified QAM NRSS National Renewable Security Standard NRT VBR Non-Real Time Variable Bit Rate NRTC National Rural Telecommunications Cooperative nRTP Non Real-time Transport Protocol

nrtPS Non-Real Time Polling Service NRT-VR Non Real Time-Variable Rate NRZ NonReturn to Zero ns Nanosecond NS Neighbor Solicitation NSI Network Side Interface NSIS Next Steps in Signaling NSP Network Service Provider NTP Network Time Protocol NTS Near Term Storage NTSC National Television System Committee NVM Non-Volatile Memory NVOD Near Video on Demand NW Network O/E Optical Signal-to-Electrical Signal conversion OA&M Operations, Administration & Maintenance OADM Optical Add/Drop Multiplexer OAM Operations, Administration, Management OAM&P Operations, Administration, Maintenance and Provisioning OASIS Organization for the Advancement of Structured Information Standards OCAP OpenCable™ Application Platform OC-CC OpenCable™ CableCARD™ OC-CFR OpenCable™ - Core Functional Requirements OCn Optical Carrier (level) OCn Optical Carrier (level) OCS Online Charging System OCSP Online Certificate Status Protocol OCST Office of Cable Signal Theft OC-x Optical Carrier (level) OCXO Oven Controlled Crystal Oscillator ODA Outlet Digital Adapter ODRL Open Digital Rights Language ODU Optical Data Unit ODU-1 Optical Data Unit – Level 1 OE Optical Ethernet O-E Optical-Electrical OEM Original Equipment Manufacturer O-E-O Optical-to-Electrical-to-Optical OEPL Optical Ethernet Private Line OEPLAN Optical Ethernet Private Local Area Network OEVPL Optical Ethernet Virtual Private Line OEVPLAN Optical Ethernet Virtual Private Local Area Network OFC Optical Fiber Communication OFCS Offline Charging System OFDM Orthogonal Frequency Division Multiplexing OFDMA Orthogonal Frequency Division Multiple Access OH Overhead OIU Organizationally Unique Identifier OJT On-The-Job Training OLA Optical Line Amplifier OLT Optical Line Terminal (or Termination) OM Order Management OMA Open Mobile Alliance OMG Object Management Group ONDS Optical Node Distribution Switch ONT Optical Network Terminal

ONU Optical Network Unit OOB Out-of-Band OOF Out of Frame OOK On-Off-Keying OOM Order Of Magnitude OOO Optical-Optical-Optical OpEx Operating Expenses OPVC1 Optical channel Payload Virtual Container-Level 1 ORX Optical Receiver OS Operating System OSA SCS Open Service Access-Service Capability Server OSA Open Service Access OSC Optical Supervisory Channel OSCT Operational Service Communications Tool OSDE Open Service Delivery Environment OSGi Open Services Gateway Initiative OSI Open Systems Interconnect OSMINE Operations Systems Modification for the Integration of Network Elements OSNR Optical Signal-to-Noise Ratio OSP Outside Plant OSPF Open Shortest Path First OSPF-TE Open Shortest Path First with Traffic Engineering OSS Operation Support System OSSI Operational Support System Interface OSW Optical SWitch OTA Over-the-Air OTDR Optical Time Domain Reflectometer OTN Optical Transition Node OTN Optical Transport Network OTTP Over-The-Top Provider OTU2 Optical Transport Channel Unit 2 OTU-N Optical Transport Unit OTX Optical Transmitter OUI Organizationally Unique Identifier OWG OnRamp Working Group OXC Optical Cross Connect P/E Profits to Earnings P2MP Point to Multipoint P2P LSP Peer-to-Peer Layered Service Provider P2P Peer to Peer P2P Point to Point PAC Personal Air Communication technology protocol P2PE Point-to-Point Emulation PABX Private Automatic Branch Exchange PAC Personalized Adaptive Coding PAC Provisioning, Activation and Configuration PACM Provisioning, Activation, Configuration and Management PAM PacketCable Application Manager PAM Pulse Amplitude Modulation PAMS Passive Acoustic Monitoring System PAMS Perceptive Analysis Measurement System PAN Personal Area Network PAR Project Authorization Request PARM Parameter PAT Port Address Termination PAT Program Association Table

PBBTE Provider Backbone Bridging with Traffic Engineering PBH Peak Busy Hour PBIA Personal Broadband Industry Association PBM Program Based Mosaic PBNM Policy-Based Network Management PBP Personal Basis Profile PBR Policy Based Routing PBT Provider Backbone Transport PBX Private Branch Exchange PC PacketCable™ PC Personal Computer PC1 Packet Cable version1 PC2.0 PacketCable™ 2.0 PCI Peripheral Connect Interface PCM Pulse Code Modulation PCMCIA Personal Computer Memory Card Interface Adaptor PCMCIA Personal Computer Memory Card International Association PCMM PacketCable™ Multimedia PCR Peak Cell Rate PCR Program Clock Reference PCRF Policy and Charging Rules Function PCS Personal Communications System P-CSCF Proxy-Call Session Control(ler) Function PDA Personal Digital Assistant PDD Post-dial Delay PDF Policy Decision Function PDF Policy Distribution Function PDF Probability Density Function PDG Packet Data Gateway PDH Plesiochronous Digital Hierarchy PDI Path Defect Indicator PDL Polarization Dependent Loss PDN Public Data Network PDP Packet Data Protocol PDP Policy Decision Point PDSN Packet Data Serving Node PDU Protocol Data Unit PDW Polarization Dependent Wavelength PEF Policy Enforcement Function PEG Pain per Eyeball Gained PEG Public, Education, Government PEI Policy Enforcement Interface PEP Policy Enforcement Point PER Packet Error Rate PESQ Perceptual Evaluation of Speech Quality PF Policy Function PHB Prescribed per Hop Behavior PHS Packet Header Suppression PHS Payload Header Suppression PHY Physical (layer) PIC Photonic Integrated Circuit PID Packet Identifier PID Program Identifier PIM Protocol Independent Multicast PIM-DM Protocol Independent Multicast-Dense Mode PIM-SM Protocol Independent Multicast – Sparse Mode

PIN Positive-Intrinsic-Negative PIN Personal Identification Number PING Packet Internet Groper PIP Picture In Picture PKI Public Key Infrastructure PKM Privacy and Key Management PKT Packet pktc PacKeT Cable PL Packet Loss PLC Packet Loss Concealment PLC Powerline Communications PLMN Public Land Mobile Network PLT Powerline Telecommunications PM Performance Monitoring PM Phase Modulation PMD Polarization Mode Dispersion PMK Pairwise Master Key PMP Point to MultiPoint PMP Portable Media Player PMT Program Map Table PN Program Number PO Purchase Order PoC Push to talk over Cellular POD Point of Deployment POF Plastic Optical Fiber POH Path Overhead PON Passive Optical Network PON Passive Optical Network POP Point Of Presence POP3 Post Office Protocol 3 POS Packet Over SONET POS Point of Sale POTS Plain Old Telephone Service p-p Peak to peak PPD Post-pickup Delay PPE Programmable Processing Element(s) PPmux Point-to-Point Multiplexer PPP Point-to-Point Protocol PPPoA PPP over ATM PPPoE Point-to-Point Protocol over Ethernet pps packets per second PPS Packets Per Second PPT Power Passing Tap PPTP Point-to-Point Tunneling Protocol PPV Pay Per View PQ Picture Quality PRBS Pseudo-Random Binary Sequence PRBS Pseudo-Random Bits Stream PRCF Positioning Radio Coordination Function PRI Primary Rate Interface PRM Polarization Recovery Module PRNG Pseudo Random Number Generators PRV Privacy PS Packet Switch PS Policy Server PS Portal Services

PS Power Supply PS Provisioning Server PSA PacketCable Service Agreement PS-CN Packet Switched Core Network PSD Power Spectral Density PSI Program Specific Information PSIP Program and System Information Protocol PSK Phase Shift Keying PSK PreShared Key PSN Packet Switched Network PSP Packet Streaming Protocol PSP Packet Success Probability PSP Play Station Portable PSQ Packet Streaming Queue PSQM Perceptual Speech Quality Measurement PSTN Public Switched Telephone Network Pt to Pt Point to Point PTK Pairwise Temporal Key PTP Point To Point PTS Program Transport Stream PTT Postal, Telegraph and Telephone PTT Push to Talk PTV PowerTV PUSC Partial Usage of Subchannels PV Present Value PVC Permanent Virtual Circuit/Connection PVC Private Virtual Circuit PVR Personal Video Recorder PVT Provider VLAN Transport PW Pseudo Wire PWE3 Pseudowire Emulation Edge-to-Edge PWE3 Pseudo-Wire End-to-End Working Group Q1 Quarter 1 QA Quality Assurance QAM Quadrature Amplitude Modulation QBP QoS Boundary Point QCC QoS Characteristics Management Client QCIF Quarter Common Intermediate Format QCS QoS Characteristics Management Server QEF Quasi-Error Free QFM QoS prioritized Forwarding and Media Access QoE Quality of Experience QoS Quality of Service QPSK Quadrature Phase Shift Keying R&D Research and Development R.H. Relative Humidity RA Router Advertisement RACF Resource Access Control Function RACS Resource and Admission Control Sub-system RADD Remote Addressable DANIS/DLS RADIUS Remote Authentication Dial-in User Service RAI Remote Alarm Indication RAID Redundant Array of Inexpensive Disks RAM Random Access Memory RAN Radio Access Network RAN Regional Area Network

RAP Regional Access Point RAP Resource Allocation Protocol RBOC Regional Bell Operating Company RBW Resolution Bandwidth RC Redistribution Control RCA Root Cause Analysis RCEF Resource Control and Enforcement Function RCV Receiver RDC Reverse Data Channel RDF Resource Description Framework RDI Remote Defect Indicator RDI Remote Detection Indication REL Rights Expression Language REN Ringer Equivalence Number REQ Request ResApp Resident Application RESV Reservation REW Rewind RF Radio Frequency RFC Request for Comment RFI Request for Information RFP Request for Proposal RG Residential Gateway RIAA Recording Industry Association of America RIN Relative Intensity Noise RIP Routing Information Protocol RISC Reduced Instruction Set Computer RJ Registered Jack RKS Record Keeping Server RM Resource Manager RMS Root Mean Square RNC Radio Network Controller RNOC Regional Network Operations Center RO Read Only ROADM Reconfigurable Optical Add/Drop Multiplexer ROAP Rights Object Acquisition Protocol ROB Return on Bandwidth ROI Return on Investment ROM Read Only Memory RP Rendezvous Point RPD Return Path Demodulator RPF Reverse Path Forwarding RPM Revolutions per Minute RPR Resilient Packet Ring RS Reed-Solomon RS Router Solicitation RSA Reed-Solomon Association RSA Rivest Shamir Adleman RSS Rich Site Summary or Really Simple Syndication RSTP Rapid Spanning Tree Protocol RSVP Resource reSerVation Protocol RSVP-TE Resource Reservation Protocol with Traffic Engineering RT VBR Real-Time Variable Bit Rate RT Real Time RTA Real Time Acquisition RTA Real Time Asset

RTCP Real time Transmission Control Protocol RTCP-XR Real time Transmission Control Protocol-Extended Reports RTD Round Trip Delay RTE Real Time Encoder RTI Real Time Ingest RTN Regional Transport Network RTOS Real Time Operating System RTP Real Time Protocol RTP Real-time Transport Protocol RTPS Real Time Polling Service rtPS Real Time Polling Service RTSP Real Time Streaming Protocol RTT Round-Trip Time RT-VR Real Time-Variable Rate RU Rack Unit RU Revenue Unit RW Rewind RX Receive or receiver RxMER Receive Modulation Error Ratio RZ Return to Zero RZ-DPSK Return to Zero Differential Phase Shift keying s.f. Square Foot S/I Signal-to-Interference Ratio S/IMP Signal-to-Impulse Ratio S/N Signal-to-Noise Ratio SA Scientific Atlanta SAG Synthetic Analog Gateway SAID Security Association Identifier SAII Source Attachment Individual Identifier SAML Security Assertion Markup Language SAN Storage Area Network SAP Secondary Audio Program SAP Service Access Point SARA Scientific-Atlanta Resident Application SATA Serial Advanced Technology Attachment SAToP Structured Agnostic TDM over Packet SAW Surface Acoustic Wave SB Switched Broadcast SBC Session Border Control(ler) SBC Switched Broadcast Client SBM Switched Broadcast Manager SBS Stimulated Brilliouin Scattering SBS Switched Broadcast Server SBV Switched Broadcast Video SBW Signal Bandwidth SC/APC Standard Connector/ Angled Physical Contact SCADA Supervisory Control And Data Acquisition SCC Seamless Content Consumption S-CDMA Synchronous Code Division Multiple Access SCIM Service Capability Interaction Manager SCM Stored Content Manager SCM Sub-Carrier Multiplexing SCMS Serial Copy Management System SCN Service Class Name SCN Shared Content Network SCO Synchronous Connection Oriented

SCP Service Control Platform SCR Silicon Controlled Rectifier SCS Service Capability Server s-CSCF Serving-Call Session Control Function SCSI Small Computer System Interface SCTE Society of Cable Telecommunications Engineers SD Secure Digital SD Standard Definition SDB Switched Digital Broadcast SDC Service Data Center SDF Service Degradation Failure SDH Synchronous Digital Hierarchy SDI Secure Digital Interface SDIO Secure Digital Input/Output SDK Software Development Kit SDL Simple DirectMedia Layer SDMH Severely Degraded Modem Hours SDMI Secure Digital Music Initiative SDP Service Delivery Platform SDP Session Description Protocol SDPF Service Policy Decision Function SDRAM Synchronous Direct Random Access Memory SDRF Software Defined Radio Forum SDTV Standard Definition Television SDV Switched Digital Video SDVoD Standard Definition Video on Demand SDVOD Standard Definition Video-on-Demand SEM Subscriber Experience Management SER Symbol Error Rate SERDES Serializer/Deserializer SES Severely Errored Seconds SESR Severely Errored Seconds Ratio SF Service Flow SF SuperFrame SFA Service Flow Authorization SFID Service Flow Identifier SFM Service Flow Management SFM Single-Flow Multicast SFM Source Filtered Multicast SFP Small Form-factor Pluggable SFP Small Form-factor Pluggable SG Service Group SG Signaling Gateway SGC Signaling Gateway Controller SGSN Serving GPRS Support Node SGW Security GateWay SGW Signaling Gateway SHA-1 Secure Hash Algorithm version 1 SHDB Switched High-Definition Digital Broadcast SI Service Information SI System Information SIC Standard Industrial Classification SID Service Identifier SID Shared Information/Data SIFS Shortest InterFrame Space SIGTRAN Signal Transmission

SIM Subscriber Identity Module SIP Session Initiation Protocol SISO Single-Input Single-Output SLA Service Level Agreement LC Shorten Last Codeword SLF Subscription Location Function SLIC Subscriber Line Interface Card SLM Signal Level Meter SM Single Mode SMB Server Message Block SMB Small to Medium Business SME Small to Medium Enterprise SMF Single Mode Fiber SMPTE Society of Motion Picture and Television Engineers SMS Service Management System SMS Short Message Service (or System) SMSC Short Message Service Center S-MTA Standalone Multimedia Terminal Adaptor SMTP Simple Mail Transfer Protocol SMx Segment Manager X SNA Systems Network Architecture SNC Sub-Network Connection SNG Satellite News Gathering SNI Service-to-Network Interface SNMP Simple Network Management Protocol SNR Signal-to-Noise Ratio SOA Semiconductor Optical Amplifier SOA Service Oriented Architecture SOAP Simple Object Access Protocol SoC Systems on a Chip S-OFDM Scalable Orthogonal Frequency Division Multiplexing SOH State of Health SOHO Small Office/Home Office SONET Synchronous Optical Network SP Service Provider SP Single Program SPAN Services & Protocols for Advanced Networks S-PDF Service-based - Policy Decision Function SPDF Synchronous Piggybacked Data Flow SPDIF Sony/Philips Digital Interface SPE Synchronous Payload Envelope Spec. Specification SPI Spending Potential Indexes SPIT SPAM over IP Telephony SPM Self phase modulation SPP Serial Port Profile SPR Subscription Profile Repository SPTS Single Program Transport Stream SQL Structured Query Language SQM Sustainable Quality Management SR Switch Router RM Session and Resource Manager SRM Session Resource Manager SRM System Resource Manager SRP SIP Routing Proxy SRS Stimulated Raman Scattering

SRTP Secure Real-time Transport Protocol SRV Server SS7 Signaling System 7 SSB Single Sideband SSD Solid State Disk SSF Services Switching Function SSH Secure Shell SSID Service Set Identifier SSL Secure Sockets Layer SSM Source Specific Multicast SSMF Standard Single Mode Fiber SSO Single Sign On SSP Session Setup Protocol SSP/SIS Shell Session Protocol / Session Initiation System StatMux Statistical Multiplexing STB Set-Top Box Std Standard STG Subscriber Telephony Gateway STL Studio-to-Transmitter Link STM Synchronous Transfer Mode STM Synchronous Transport Module STP Spanning Tree Protocol STS Synchronous Transport Signal STS-1 Synchronous Transport Signal – Level 1 STT Set-top Terminal STTD Space Time Transmit Diversity STUN Simple Transversal of UDP (User Datagram Protocol) Through NAT (Network

Address Translation) SU Subscriber Unit SUT System Under Test SVG Scalable Vector Graphics SVOD Subscription Video on Demand SVOD Switched Video on Demand SVP Secure Video Processor SW Software SWB Switched Broadcast SX Short Reach as in 1000Base-SX SYNC Synchronization Profile SYSLOG System Log T&B Traffic & Billing T1 First level T-Carrier 1 (1.544Mbps Transmission facility) T3 Third level T-Carrier 3 (44.736Mbps Transmission facility) TAC Technical Assistance Center TAII Target Attachment Individual Identifier TB Terabyte TBD To Be Determined Tbps Terabits per Second TC Transmission Convergence TCAP Transaction Capabilities Application Part TCM Tandem Connection Monitoring TCM Trellis Coded Modulation TCO Total Cost of Ownership TCP Transmission Control Protocol TCP/IP Transmission Control Protocol/Internet Protocol TCXO Temperature Controlled Crystal Oscillator TD-CDMA Time Division-Code Division Multiple Access

TDD Telecommunication Devices for the Deaf TDD Time Division Duplex TDM Time Division Multiplexing TDMA Time Division Multiple Access TDMoDOCSIS Time Division Multiplexing over DOCSIS TDMoIP Time Division Multiplexing over Internet Protocol TD-SCDMA Time Division-Synchronous Code Division Multiple Access TE Traffic Engineering TEC Triggered Event Command TELR Talker Echo Loudness Rating TFF Thin Film Filter TFTP Trivial File Transfer Protocol TG Task Group TGCP Trunking Gateway Control Protocol TGS Ticket Granting Server THz Terahertz TIA Telecommunication Industry Association TIA TransImpedance Amplifier TIPHON Telecommunications & Internet Protocol Harmonization Over Networks TISPAN Telecom & Internet Services & Protocols for Advanced Networks TKIP Temporal Key Integrity Protocol TL1 Transaction Language One TLS Transparent LAN Service TLS Transport Layer Security TLV Type, Length, Value TMPLS Transport MPLS TN Telephone Number, Timeslot Number, Telecommunications Network, Transit Node TNCS Transmission Network Control System TOADM Tunable Optical Add/Drop Multiplexer TOD Television on Demand ToD Time of Day ToF Time of Flight TOS Theft of Service TOS Type of Service TPL TDM Private Line TR Technical Reference TRCF Transport Resource Control Function TrGW Translation Gateway TRI Telephony Return Interface TRP Target Rating Points tRTO TCP Retransmit Timeout TS Transport Stream TSI Time Slot Interchange TSID Transport Stream Identifier TSP TDM Service Processor T-SPEC Traffic SPECification TSR Technical Service Representative TSS Telephony Switching Sub-System TTL Time To Live TTLS Tunnel Transparent Layer Security TTY TeleTYpe TURN Traversal Using Relay NAT (Network Address Translation) TV Television TVOD Television on Demand TWAMP Two-Way Active Measurement Protocol TWC Time Warner Cable

TX Transmit or transmitter TxMER Transmit Modulation Error Ratio TXOP Transmission Opportunity U/S Upstream UA User Agent U-ASPD Unscheduled - Automatic Power Save Delivery UBR Unspecified Bit Rate UCC Upstream Channel Change UCD Upstream Channel Descriptor UCID Upstream Channel Identifier UDDI Universal Description, Discovery and Integration UDLR Uni-Directional Link Routing UDP User Datagram Protocol UDP/IP User Datagram Protocol/Internet Protocol UDSL Unidirectional Digital Subscriber Line UDWDM Ultra Dense Wave Division Multiplex UE User Equipment UEQ Universal Edge QAM UGC User Generated Content UGS Unsolicited Grant Service UGS/AD UGS with Activity Detection UHF Ultra High Frequency UI User Interface UKL Unit Key List UL Uplink UMA Unlicensed Mobile Access UML Unified Modeling Language UMTS Universal Mobile Telecommunications System UNC UMA (Unlicensed Mobile Access) Network Controller UNE Unbundled Network Element UNE-P Unbundled Network Element - Platform UNI User Network Interface UNI-C User Network Interface – Customer (Network) UNI-CE User Network Interface – Customer Edge U-NII Unlicensed National Information Infrastructure UNI-N User Network Interface – (Provider) Network UPA Usability Professionals’ Association uPE User (Device) Provider Edge UPnP Universal Plug and Play UPS Uninterruptible Power Supply URI Uniform Resource Identifier URL Uniform Resource Locator US Upstream USB Universal Serial Bus USD United States Dollar(s) USF Universal Service Fund USM User-based Security Model USRM Universal Session Resource Management UTI Universal Transport Interface UTP Unshielded Twisted Pair UTRAN UMTS Terrestrial Radio Access Network UWB Ultra Wideband V Voltage V/A Video/Audio VAC Volts Alternating Current VAD Voice Activity Detection

VAG Voice Access Gateway VAR Value Added Reseller VAS Value Added Service VBI Vertical Blanking Interval VBR Variable Bit Rate VBR Variable Bit Rate VBR-NRT Variable Bit Rate – Non-Real Time VBR-RT Variable Bit Rate – Real Time VC Virtual Channel, Virtual Circuit VC1 Video Codec 1 VC-1 Video Coding 1 (Formerly VC-9--Soon to be known as SMPTE 421M) VC-1 Video Compression 1 (Formerly VC-9--Soon to be known as SMPTE 421M) VCAT Virtual Concatenation VCC Voice Call Continuity VCC Voice Call Continuity VCI Virtual Channel Identifier VCM Variable Coding and Modulation Vco Voltage Cut Off VCR Video Cassette Recorder VDC Volts Direct Current VDSL Very High-bit-rate Digital Subscriber Line VDSL2 Very High-bit-rate Digital Subscriber Line 2 VER Virtual Ethernet Ring VHF Very High Frequency VHS Video Home System VL2SI Virtual LAN to Serial Interface VLAN Virtual Local Area Network VLL Virtual Leased Line VLR Visitor Location Register VLSM Variable Length Subnet Mask VM Virtual Machine VMM Vehicular Modem Module VN Voltage Null VoD Video on Demand VODoIP Video on Demand over Internet Protocol VoDSL Video over Digital Subscriber Line VoIP Voice over Internet Protocol VoWi-Fi Voice over Wi-Fi VP Voltage Peak V-PCRF Visited Policy and Charging Rules Function VPI Virtual Path Identifier VPL Virtual Private Line VPLS Virtual Private Label Service VPLS Virtual Private LAN Service VPN Virtual Private Network VPWS Virtual Private Wire Service VQ Vector Quantization VQI Voice Quality Index VRAM Video Random Access Memory VRF Virtual Routing and Forwarding Tables VRN Video-Rich Navigation VRNAV Video-Rich Navigation Audio/Visual VRTX Virtual Real-Time Extension VS Video Server VSA Vector Signal Analyzer VSAT Very Small Aperture Terminal

VSB Vestigial Sideband VSG Vector Signal Generator VSI Virtual Switch Interface VT Virtual Tributary VTS Video Transport Service W Watt WAG Wireless Access Gateway WAN Wide Area Network WAP Wireless Access Point WAV Windows Wave WCD Wideband Channel Descriptor WCDMA Wireless Code Division Multiple Access WCM Wideband Cable Modem WCMTS Wideband Cable Modem Termination System WDM Wave Division Multiplex(ing) WECA Wireless Ethernet Compatibility Alliance WEP Wired Equivalent Privacy WFA Workforce Automation WFM Wideband FM WFM Workforce Management WFQ Weighted Fair Queuing -Fi Wireless Fidelity WiMAX Wireless Microwave Access WiMax Worldwide Interoperability for Microwave Access WiMedia An alliance for Wireless Multimedia WIN Wireless Intelligent Network WIP Work in Process WIWWIW “What I Want When I Want” WLAN Wireless Local Area Network WLL Wireless Local Loop WM Wave Mixing WM Wave Multiplexing WM9 Windows Media Player, version 9 WMA Windows Media Audio WMAN Wireless Metropolitan Area Network WMC Wireless Modem Card WME Wireless Multimedia Extension WMM Wi-Fi MultiMedia WMM-SA Wi-Fi MultiMedia Standards Association/Alliance WMV Windows Media Video WOFDM Wavelet Orthogonal Frequency Division Multiplexing WPA Wireless (Wi-Fi) Protected Access WPA2 Wireless (Wi-Fi) Protected Access 2 WPA-FSK Wireless (Wi-Fi) Protected Access with Pre-Shared Key WPAN Wireless Personal Area Network WPE Wireless Plant Extension WRED Weighted Random Early Detection WSDL Web Services Definition Language WSDL Web Services Description Language WSS Wavelength Selective Switch WW Worldwide WWDM Wide WDM WWRF Wireless World Research Forum WWW World Wide Web XAIT Extended Application Information Table XAUI 10 Gigabit Ethernet Attachment Unit Interface

xDSL Any variant of the Digital Subscriber Line technology XENPAK Fiber Optic Transceiver Module conforming to 10GigE Standard XFP 10-Gigabit Small Form-factor Pluggable GBIC Module XHTML Extensible Hypertext Markup Language XMI XML Metadata Interchange XML Extensible Markup Language XMOD Cross Modulation xOD X-service on Demand (i.e., Movies on Demand) XPM Cross-Phase Modulation xPON X version of Passive Optical Network xVOD X version (or form) of Video on Demand (i.e., Subscription, Near, etc.) xWDM Non-specific form of Wave Division Multiplex y/y Year Over Year ZWP Zero Water Peak ZWPF Zero Water Peak Fiber