NDLI: The evolution of service protection in the BT network

Content Provider	IEEE Xplore Digital Library
Author	Davidson, J. Hawker, I. Cochrane, P.
Copyright Year	1989
Description	Author affiliation: British Telecom Res. Lab., Ipswich, UK (Davidson, J.; Hawker, I.; Cochrane, P.)
Abstract	The evolution of telecommunications transmission technology from analog and metallic cables to digital and optical fiber, coupled with new service demands, has caused network protection strategies to change their focus. The way in which BT (British Telecom) has addressed this problem is examined and future SONET and PON options are considered. The discussion is supported by computed path availability characteristics for a range of equipment, plant, and topology options. It is noted that network protection is not a static problem. With each new transmission technology the key sensitivity points have migrated from the line system and cable to the multiplexer and terminal equipment. Passive optical networks look set to offer the ultimate path diversity protection. In the BT network it is the local/access networks that offer the most difficult environment, with true path diversity being hard to achieve due to the inherent tree and branch topology of the ducts. In contrast, long and medium-haul networks are more fully meshed and well adapted to triangulation and diversity.
Starting Page	835
Ending Page	839
File Size	409307
Page Count	5
File Format	PDF
DOI	10.1109/GLOCOM.1989.64080
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-11-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protection Passive optical networks Telecommunication network topology Optical fiber cables Optical fibers Optical coupling SONET Telecommunication computing Availability Multiplexing
Content Type	Text
Resource Type	Article

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