Private branch exchange apparatus

Details Private branch exchange apparatus Private branch exchange apparatus

1996-04-01

1999-09-21

Shankar, Vijay

Telephonic communications

With usage measurement

Call traffic recording or monitoring

H04M 1500

Patent

active

059563923

ABSTRACT:
A private branch exchange apparatus which encloses a plurality of external lines and a plurality of extensions including a discriminating circuit to discriminate the number of calls which are being executed and a refusing circuit to refuse a reception call when it is discriminated by the discriminating circuit that the number of calls which are being executed is equal to or larger than a predetermined value such as 1.

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