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P. de Visser

Rail Engineering Group, Signals & Communication Engineer

The high operating costs, the unreliability and the lack of expansion capacity of the MetRail communication network has resulted in the replacement of the following telephone exchanges:-

a. The Ericsson OS1029, a SO year old hybrid rotary and step by step exchange located in the old Head Office at 67 Spencer Street, which provided 1500 extensions;

b. The Ericsson ARD571, an 11 year old cross bar-gxskange-located at the Electrical Control Centre in Batman Avenue, providing 270Bextensions;

c. A modified Ericsson OS1029, an 18 year old hybrid step by step crossbar exchange located at the Spotswood Stores Depot, providing 500 extensions.

As well as these, a number of smaller PABXs and intercom exchanges were also replaced.