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Overview of Line Sharing and Collocation Arrangements in Voice and Data Networks

This document provides a detailed overview of line sharing and collocation arrangements involving ILEC and CLEC networks. It covers components such as copper distribution, data and voice integration, and digital subscriber line access multiplexers (DSLAM). Various configurations and terminologies, including SONET, TDM circuits, and ATM switches, are illustrated through diagrams. The text serves as a useful guide for telecommunications professionals working with voice and data infrastructure, along with an explanation of the necessary acronyms for better understanding.

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Overview of Line Sharing and Collocation Arrangements in Voice and Data Networks

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  1. Serving Area Interface Line Sharing on Home Run Copper - Figure 1 ILEC Serving Wire Center ILEC Class 5 Switch Voice Copper Distribution M D F Voice Copper Feeder Voice D S L A M S P L I T T E R Data Data Data + Voice CLEC Collocation Arrangement

  2. ILEC Serving Wire Center Serving Area Interface ILEC Class 5 Switch M D F Voice Voice Common Area D S L A M S P L I T T E R Data Data CLEC Collocation Arrangement Line Sharing on Home Run Copper - Figure 2 Voice Copper Distribution Copper Feeder Data + Voice

  3. ILEC Serving Wire Center Serving Area Interface ILEC Class 5 Switch Voice M D F Voice S P L I T T E R Data D S L A M CLEC Collocation Arrangement Line Sharing on Home Run Copper - Figure 3 Voice Copper Distribution Copper Feeder Data Data + Voice

  4. ILEC Serving Wire Center ILEC Serving Area Interface S O N E T TDM Circuit- Switched Voice SONET ILEC Class 5 Switch Data POTS Voice ATM Data CLEC Collocation Arrangement P O R T TC CC1 CC2 CLEC DSLAM/ Splitter Transit ILEC ATM Switch Key: Analog Voice and Data Analog Voice only Data only Acronyms: ATM – Asynchronous Transfer Mode CC1 & CC2 – Cross-Connects DLC – Digital Loop Carrier Equipment DSLAM – Digital Subscriber Line Access Multiplexer FPVC – Fiber-Fed Permanent Virtual Circuit FPVP – Fiber-Fed Permanent Virtual Path HFPSL – High Frequency Portion of the Sub-loop IOT – Interoffice Transport LCRT – Line Card in Remote Terminal OCD – SBC’s “Optical Concentration Device” POP – Point of Presence POTS – Plain Old Telephone Service Equipment SONET – Synchronous Optical Network Equipment TC – Tie Cable TDM – Time Division Multiplexed PORT Data TC CLEC Collocation Arrangement CLEC Node/POP/ Other Collocation Line Sharing on Fiber-Fed DLC - Figure 4 ILEC Remote Terminal DLC Fiber (active) Fiber (protect) Fiber (active) Fiber (protect) Voice HFPSL HFPSL FPVC/FPVP and TDM Circuit- Switched LCRTs ILEC ATM Switch/ “OCD” Data IOT IOT IOT IOT IOT ILEC ATM Edge Switch Location

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