Digital exchanging apparatus and method of communication...

Details Digital exchanging apparatus and method of communication... Digital exchanging apparatus and method of communication...

2005-06-07

2005-06-07

Matar, Ahmad F. (Department: 2642)

Telephonic communications

Plural exchange network or interconnection

With interexchange network routing

C379S221030, C379S279000

Reexamination Certificate

active

06904142

ABSTRACT:
IP-PBXs having different structure, for example, stand-by and active transmission lines are connected between unused pins of the interface block24A and24B to supply the relay driving signal from the switching block20A to the switching block20B according to a control signal from the control block18,and change the transmission lines, and maintain a direct route.

REFERENCES:
patent: 5923643 (1999-07-01), Higgins et al.
patent: 6359858 (2002-03-01), Smith et al.
patent: 6396847 (2002-05-01), Rezaie et al.
patent: 11-046207 (1999-02-01), None

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