| 摘要 |
PURPOSE:To avoid wasteful receiving processing at ISDN terminal equipment at the time of the incoming of a call transferred in the form of broadcasting by making only the ISDN terminal equipment to which a TEI value is assigned continue terminating processing, and returning the other ISDN terminal equipment concerned to which the TEI value is not assigned to a receive preparing state. CONSTITUTION:UI frame information transmitted from an ISDN is transferred in the form of the broadcasting to every ISDN terminal equipment 3 to 5 through a network terminating set 2. Each ISDN terminal equipment 3 to 5 checks the contents of a UI frame, and checks whether or not a reference number is the same as the assigned TEI value, and when it is the same, it continues the terminating processing, and when it is not the same, it returns to a receive waiting state without executing releasing sequence. Accordingly, even in the case the incoming call is transferred at a time in the form of the broadcasting to plural ISDN terminal equipment 3 to 5 connected on bus wiring, the wasteful communication sequence at arrival of the call at the ISDN terminal equipment 3 to 5 like in the past can be excluded, and an unnecessary communication record does not remain either. |
