ISDN in the Indian Context

Abstract

The process of digitisation of the telephone network in India is well underway, with the digitisation of the trunks and introduction of digital switches. If the local loops are also digitised, it is possible to have end-to-end digital connectivity, making it possible to provide narrowband ISDN services, at least in selected areas. This paper describes methods of using existing switches and multiplexers in the Indian telephone network to provide narrowband ISDN services. The paper also proposes some novel ways of providing optical-fibre local loops which may be cost effective.

Indexing terms:

• ISDN
• IAU
• Subscriber access
• Optical fibre