The Ericsson MD110 PABX is a stored program control exchange employing digital switching and transmission techniques. Park and Avenue Campuses are linked via high speed circuits and it is not necessary to dial access between them.
Most extensions are able to dial local and national calls.
International access can be given on written authority of cost centre managers. Call logging equipment is installed to record the duration of calls and numbers dialed, with monthly reports sent to cost centre managers. The equipment does not listen to the actual calls. To call extensions at Sunley Management Centre, dial 72 - followed by the extension number required. To dial from Sunley Management Centre, dial 95 - followed by the extension number required.