SYSTEM FOR EXPANDING CAPACITY OF A TELEPHONE EXCHANGE NETWORK

摘要

-16- A method is provided for expanding capacity of an exchange network of a telephone system when the exchange network includes a plurality of existing communication ports arranged to selectively communicate with one another, ea ch existing communication port being associated with a telephone number of a finite set of telephone numbers. The method includes providing a plurality of auxiliary communication ports arranged to selectively communicate with the existing communication ports which are identified by a serial number only so as not t o be directly associated with any telephone numbers of the finite set of telephon e numbers. Communicating devices connected to the existing communication ports which are not required to directly receive incoming telephone calls are reconnected to the respective auxiliary communication ports.