1. Harrison F G: ’Development of a 560 Mbit/s optical fibre system for trunk network application’, to be published at the 3rd International Conference on Telecommunication Transmission, IEE, London (March 1985).
2. British Standard BS4803 (1983).
3. Brooks R M and Jessop A: ’Line coding for optical fibre systems’, Int J Electron, 55, No 1, pp 81–120 (June 1983).
4. Brooks R M, Sharland A J, Whitt S, Higginson R J and Lilly C J: ’An optical fibre supervisory sub-system employing an entirely optical telemetry path’, 8th ECOC, Cannes, France, pp 400–406 (September 1982).
5. Sharland A J, Brooks R M, Coombs G P and Whitt S: ’An optical fibre supervisory system’, Br Telecom Technol J, 1, No 1, pp 31–37 (July 1983).