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Committee T1 Work on Digital Hierarchies

Committee T1 Work on Digital Hierarchies. Ken Biholar T1X1 Chairman Wayne Zeuch T1 Vice Chairman. Optical Transport Networks. Digital Hierarchies. T1X1 addresses: Optical Transport Networks (OTN) Synchronous Optical Networks (SONET)

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Committee T1 Work on Digital Hierarchies

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  1. Committee T1 Work onDigital Hierarchies Ken Biholar T1X1 Chairman Wayne Zeuch T1 Vice Chairman GSC-8, OTTAWA

  2. Optical Transport Networks Digital Hierarchies • T1X1 addresses: • Optical Transport Networks (OTN) • Synchronous Optical Networks (SONET) • SONET standards are in a mature state, efforts this past year focused on incorporation of Virtual Concatenation and Link Capacity Adjustment Scheme (LCAS) for Virtual Concatenated Signals into the existing T1 and ITU-T standards. • A major focus of the work efforts in 2002 was the submission of contributions to Recommendations being developed in ITU-T Study Group 15 GSC-8, OTTAWA

  3. Optical Transport Networks SONET (Synchronous Optical Networks) – T1.105 • Link Capacity Adjustment Scheme (LCAS) • Supports Virtual Concatenation (T1.105 Addendum approved in 2002) • Payload Mappings; T1.105.02 Addendum on GFP • mapping of GFP signals into payloads (also included in ITU-T SG 15 Recommendations)  • Physical Layer Specifications • T1.105.06 Revisions incorporated short-reach interface requirements (completed in 2002)  GSC-8, OTTAWA

  4. Optical Transport Networks SONET (Synchronous Optical Networks) • Network Element Timing and Synchronization: • T1.105.03 Revision in 2002 describes jitter specifications that are applicable to SONET optical signals (OC-N) and SONET payload signals (i.e., DS1 and DS3). • Automatic Optical Switched Networks (ASON): • 60 contributions in 2002 to the ITU-T work on ASON GSC-8, OTTAWA

  5. Optical Transport Networks SONET (Synchronous Optical Networks) • Technical Reports • Synchronization Network Architecture: • balloted in 2002 (published soon) • provides concepts and techniques for synchronization architectures for use in digital communication networks • Synchronization on Packet Networks: • work began in 2002 • will document synchronization conditions in an environment involving hybrid (packet /TDM) networks GSC-8, OTTAWA

  6. Optical Transport Networks References • T1.105-2001 - Synchronous Optical Network (SONET) - Basic Description including Multiplex Structure, Rates, and Formats (Revision of T1.105-1995; includes Supplement T1.105a-2002 – published in 2002) • T1.105.02-2001 - Synchronous Optical Network (SONET) - Payload Mappings (Revision of T1.105.02-1995; includes Supplement T1.105.02a-2002- published in 2002) • T1.105.05-2002 - Synchronous Optical Network (SONET): Tandem Connection Maintenance (Revision of T1.105.05-1994) • T1.105.08-2001 - Synchronous Optical Network (SONET) - In-band Forward Error Correction Code Specification (published in 2002) • T1.105.09-1996 (R2002) – Synchronous Optical Network (SONET) – Network Timing and Synchronization(Reaffirmation of T1.105.09-1996) GSC-8, OTTAWA

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