Private branch exchange

Details Private branch exchange Private branch exchange

1995-06-06

1997-07-15

Matar, Ahmad F.

Telephonic communications

Special services

Call diversion

379 67, 379210, 379211, 379355, H04M 354, H04M 350

Patent

active

056490046

ABSTRACT:
A private branch exchange so adapted that a plurality of call transfer addresses for an incoming call can be set for an ISDN terminal includes a controller having a decision unit for analyzing the incoming call and deciding an extension terminal that is to receive the incoming call, and a first transmitting unit for transmitting set-up messages to an ISDN extension interface. The ISDN extension interface accommodates a line connected to one or more ISDN terminals and has a second transmitting unit for transmitting a predetermined first message of the set-up messages to the terminal to which the set-up messages from the first transmitting unit are to be sent, a receiving unit for receiving a predetermined second message from the ISDN terminal that has received the first message, and a third transmitting unit for transmitting this received message to the controller. The controller further has an analyzing unit for analyzing a transfer-addressed number, notification of which is given by the ISDN terminal, contained in the message from the third transmitting unit of the ISDN extension interface, and a notifying unit for notifying a plurality of extension terminals, which correspond to the transfer-addressed number, of the incoming call via the ISDN extension interface.

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