ADVANCED SIGNALLING AND SUPERVISION.
Abstract
Signalling and supervision (S/S) is that area of communications which relates to control, management and connection of subscribers in a switched communications network. The objective of the study was to develop new and advanced signalling and supervision techniques and a related routing/numbering plan for use in future Air Force communications systems. A hypothetical system model was postulated to test the numbering plan, the routing plan and the signalling and supervision techniques developed. An all digital S/S technique has been developed using in-band techniques for non-data calls, modified out-band techniques for analog (including voice) calls, and a combination of orthogonal, maximum length code characters and ASCII characters for the actual S/S information. The S/S techniques offer an evolutionary step in communications, is directed at digital processor switch technology and can be reasonably implemented with simple digital logic circuitry and programming. It offers possibilities in monitoring channel quality both during and between connected calls. Within the limits of encryption problems as included in the study, the S/S methods afford compatibility with educated estimates on the encryption philosophy of the 70's. A routing technique which uses network management information for forwarding calls through the network has been developed. This is based on using key nodes for network management information. Another technique, using a combination of nondeterministic and 'learned' (adaptive) directory routing is also discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1967
- Accession Number
- AD0823680
Entities
People
- Irving Susskind
- Leon Stambler
- Theodore Frankel