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Fiber in the Loop System Generic Requirements

CONTENTS:

GR-909-CORE Issue 2

ABOUT:

GR-909-CORE provides system criteria for Fiber-In-The-Loop (FITL) access systems in the support of the delivery of voice, video and data services to residential and small business customers. The purpose of this document is to provide the Telcordia view of proposed generic requirements for FITL systems that are intended to be compatible with typical North American Local Exchange Carrier (LEC) service, transmission, and operations environments.

GR-909-CORE Issue 2 acts as an umbrella document, attempting to address all feature and functional requirements for FITL systems while referencing appropriate requirements for related equipment and components. As a systems document, it is intended to either 1) contain all necessary generic requirements in a particular area, or 2) cover at a high level the thrust of generic requirements in other Telcordia documents or industry standards, pointing to those documents for details.

WHAT'S NEW?:

The key changes made to this issue of GR-909-CORE include:

  • A multi-service delivery network reference architecture has been added to serve as the foundation for broadband FITL system service delivery.
  • FITL system criteria in support of Fiber-to-the-Home (FTTH) have been added.
  • Broadband customer service interfaces are now specified, including premises-based Ethernet, xDSL, and multi-channel video RF coaxial.
  • FITL system criteria have been added in support of packet transport of voice services. Existing telephony transmission performance criteria have been augmented to address packet voice specific impairment assessment.
  • FITL telephony architectures now included connectivity to softswitch based networks.
  • Telephony signaling and supervision criteria aligned with updates made to GR-57-CORE. Changes include the additions of criteria related to momentary loop open intervals, which have been added in support of type 2/3 CPE momentary extension in-use checks that are associated with service that use off-hook data transmission (like CallerID on Call Waiting). In addition Ring Trip Immunity criteria have been updated. Balanced Ringing is supported on loop-start lines, by virtue of the references to the updated GR-57-CORE.
  • Three video service delivery alternatives are now considered, including the use of a multi-channel video overlay. Preliminary set of FITL multicast video criteria provided.
  • Optical criteria has been updated to be consistent with standards-based point-to-mulitpoint FITL implementations and to support a 1550 nm video overlay. Optical return loss criteria have been added to supplement discrete reflectivity criteria.
  • Operations criteria updated to provide initial support for packet voice transport, xDSL service interfaces, and video overlay transport (including Video Return Path). A preliminary set of TL1 commands in support of ATM and xDSL technology have been added. FITL system behaviors clarified in support of embedded POTS test system test access during FITL system failure events. Craft interface criteria have been updated based on the proposal published in GR-909-ILR, Issue 1A.
  • Powering criteria has been updated to address broadband ONU power consumption, FITL system service load shedding during loss of primary power, the use of -190V dc ONU power sources, new thinking on ONU back-up power reserve times, as well as miscellaneous updates to reflect changes in powering technology.
  • Electromagnetic compatibility and electrical safety criteria have been updated to better reflect how to apply GR-1089-CORE criteria to FITL systems. In addition, new electrical protector reset criteria are provided.

Table of Contents of GR-909-CORE, Issue 2. GR-909-CORE, Issue 2 purchase information can be found HERE.

ACKNOWLEGEMENTS:

Telcordia would like to thank the GR-909-CORE, Issue 2 project participants, without whose support this project would not have been possible. The participants included:

  • Tellabs (formerly Advanced Fibre Communications (AFC))
  • CIENA (formerly Catena Networks)
  • ECI Telecom
  • Tellabs (formerly Marconi North American Access Group)
  • Qwest
  • Siemens

For more information about GR-909-CORE, Issue 2 please contact Rob Bond, +1-732-699-3445.

GR-909-CORE Issue 3

Telcordia plans to begin work on a third issue of GR-909-CORE in 2005. Topic areas that may be considered in Issue 3 of GR-909-CORE include:

  • Availability/Reliability Updates – Examine service availability and equipment maintenance rates with respect to advances in FITL technology (e.g., packet transport, standardized point-to-multipoint (PON) architectures), and the use of integrated service (voice, video, and data) delivery FITL systems.
  • Ethernet Transport Updates – The increasing role of Ethernet technology in the access network may be considered, in particular the use of Ethernet in the aggregation portion of the access network (i.e. Ethernet network interfaces on the HDT/OLT).
  • Powering Updates - Powering criteria related to Fiber-to-the-Home (FTTH), +/- 190 Vdc ONU powering, as well as additional criteria in support of FITL service loading load shedding.
  • Architecture Revisions - Consider FITL architecture updates such as (1) support for Fiber to the Neighborhood (FTTN) (2) criteria specific to Multi-Dwelling Unit (MDU)/Multi-Tenant Unit (MTU) applications (3) Routing Gateway (RG) support in the FTTH ONT.
  • FITL Multicast Revisions – Consider updates to address (1) FITL system role in conditional access control (2) multicast replication in the ONU, (3) multicast support at FITL system network interface, and (4) FITL system IGMP error handling scenarios.
  • FITL Unicast Revisions – Consider updates to address the FITL system role in connection both at the network interface and through the FITL system. Management Plane vs. Signaling Plane alternatives may be considered.
  • Operations Support Updates – Consider revisions to FITL system operations criteria in areas that include (1) FTTH-specific operations criteria (2) Additional Testing criteria specific to video, data, and packet voice service support (including the use of a TMN-centric test architecture).
  • Packet Voice Performance – Consider enhancements to the current packet voice performance criteria in areas such as bursty packet loss and system packet voice quality monitoring.

This work will benefit local exchange service providers by providing them an enhanced, full service, FITL reference specification that can enable them to issue RFPs that more accurately reflect their broadband FITL system needs. Equipment suppliers can benefit from an enhanced set of FITL criteria that includes broadband, integrated packet access, and Fiber-to-the-Premises (FTTP) applications.

For more information about the proposed GR-909-CORE, Issue 3 project please contact Rob Bond, +1-732-699-3445.