Call status recognition in a broadband private automatic branch

Details Call status recognition in a broadband private automatic branch Call status recognition in a broadband private automatic branch

1991-01-31

1992-10-20

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

H04M 1100

Patent

active

051577151

ABSTRACT:
In a broadband private automatic branch exchange (BB-PABX) in which a plurality of broadband terminals (BB-E1, . . . , BB-E26) are connected to a broadband switching array (BB-V) to switch video and data signals, the current call status of the system must be signaled to the terminals, so that a broadband connection may be activated. For this purpose, a message characterizing a quiescent state is supplied to one input/output (O) of the broadband switching array (BB-V) of the private automatic branch exchange and all nonswitched input/output (1, 2, . . . , 30) controlled by an associated control unit (C) are linked with the first input/output (O) so that the quiescent state message is always transmitted to all nonswitched terminals.

REFERENCES:
patent: 3684833 (1972-08-01), Bush et al.
patent: 4638124 (1987-01-01), Hargrave et al.

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