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Proceedings Paper

DS1 mapping considerations for the synchronous optical network
Author(s): Robert W. Cubbage; Paul A. Littlewood
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Paper Abstract

When considering today's network and looking ahead towards a complete Synchronous Optical Network (SONET), attention must be given to transitional network functionality to ensure next generation transport network element longevity. The transition will not happen overnight. Initial SONET equipment will satisfy today's transport requirements but must be capable of operating efficiently as SONET equipment in an all SONET networks. Careful consideration of transitional network functionality will ensure cost effective SONET deployment both initially and for the long term. The first requirement of the transitional network is that it be as cost efficient as the existing asynchronous network in transporting DS 1 and D53 signals. Currently, the SONET standard1 specifies five (5) ways to directly map a DS1 into a SONET VT1.5. SONET equipment will be prohibitively complex if required to support all five mappings. This paper addresses DS 1 service transport, and reviews the five DS 1 to VT mappings currently specified in the SONET standard. Network partitioning concerns resulting from multiple DS 1 mapping deployment are discussed. Finally, it is concluded that it is in a (network) provider's best interest to reduce the number of DS 1 mappings deployed in a SONET network to those which satisfy transport requirements of all current and envisioned services. To ensure optimal signal transport characteristics and minimal cost solutions for wideband and voice services in the transmission network, the floating asynchronous mapping provides the best network solution and should be used by all transport equipment not requiring DSO processing.

Paper Details

Date Published: 1 January 1991
PDF: 9 pages
Proc. SPIE 1363, Fiber Optics in the Subscriber Loop, (1 January 1991); doi: 10.1117/12.24595
Show Author Affiliations
Robert W. Cubbage, Rockwell International Corp. (United States)
Paul A. Littlewood, Rockwell International Corp. (United States)

Published in SPIE Proceedings Vol. 1363:
Fiber Optics in the Subscriber Loop
Lynn D. Hutcheson; David A. Kahn, Editor(s)

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