Patent ID: 6765999
Filing Date: 2004-07-20
Classification: H04M

Abstract:
A private branch exchange of the type that is connected with a plurality of extension telephones and is connectable with a unit for storage of response messages capable of receiving a specified signal from said exchange so as to transmit to said exchange a voice message corresponding to said signal, said private branch exchange comprising:outside line circuits connectable to a plurality of outside lines; extension line circuits connectable with said unit for storage of response messages and extension telephones; memory means for storing terminating information of an incoming call and an additional parameter in a state where the terminating information and the additional parameter are related to each other; signal generating means for generating DTMF signals on the basis of the additional parameter corresponding to the terminating information retrieved from said memory means when the incoming call is received from a first one of said outside line circuits; and transmitting means for transmitting said DTMF signals and a telephone number of a calling party according to the incoming call to said unit for storage of response messages.