WAIT SYSTEM OF RELAY LINE OPEN TYPE CATCH PHONE

摘要

PURPOSE: To release tentatively a relay line of a subscriber in a waiting state and to connect the line to a sound source such as a melody source as an intra- office speech with respect to a catch phone service (call waiting service) for subscribers. ;CONSTITUTION: An exchange B is provided with an interrupt detection means 1 to a catch phone subscriber (b), a hooking detection means 2 for the subscriber (b), a telephone number collection request means 3 from an opposite subscriber (a) making a call to an exchange A when the catch phone subscriber (b) is not a caller, a bus release and sound source connection request means 4 between the exchanges A, B in communication with each other, and a bus connection and sound source release request means 5 implementing bus connection between the exchanges A, B and the request of the subscriber (a) based on a telephone number of the opposite subscriber (a) on a memory, the exchange A returns the telephone number of the subscriber (a) by a request from the telephone number collection request means 3 as to the subscriber (a) from the exchange B, the bus release and sound source connection request means 4 in the exchange B releases a bus between the exchange A and B and connects a sound source to the subscriber (a) to attain transit to no-charging state.;COPYRIGHT: (C)1994,JPO&Japio