ISDN communication apparatus

Details ISDN communication apparatus ISDN communication apparatus

1997-07-03

1999-08-31

Nguyen, Chau

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370522, H04J 312

Patent

active

059463198

ABSTRACT:
An ISDN communication apparatus of the present invention can accept termination of information when this information is received even when there is no idle B channel. The ISDN communication apparatus comprises at least one ISDN line interface (1) connected to the ISDN line, a multiplex link forming circuit (3) connected to a plurality of B channels to form a logical link through the multiplex conversion and a point R interface (2) connected to the logical link formed of the multiplex link forming circuit. When the D-ch interface(12) detects the distant party address from the termination information from the distant communication apparatus, the main control circuit (4) compares the distant party address with the previously set reference address to detect whether these are matched or not. When these addresses are matched, the switch circuit (31) releases at least one communication channel from a plurality of B channels in the busy condition and forms a new logical link between the released B channel and the point R interface of the responsive terminal.

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patent: 5555294 (1996-09-01), Abe
patent: 5815505 (1998-09-01), Mills
patent: 5818819 (1998-10-01), Hallock et al.

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