Diploma gets about 80 per cent of its revenues from the aftermarket, replacing equipment that has failed, rather than relying on new products that may not actually be made.

Current policy seems to assume there will be no attrition: that we can protect our interests without having to spend much on replacing equipment.

The plan largely consisted of replacing equipment in exchanges and on long distance networks.

The expansion was to replace old systems, expanding the network into new areas and replacing equipment operating in non licensed radio bands.