Exchange system having originating call restriction function

Details Exchange system having originating call restriction function Exchange system having originating call restriction function

1989-04-27

1990-03-06

Dwyer, James L.

Telephonic communications

With usage measurement

Call traffic recording or monitoring

379113, 379197, H04M 1500

Patent

active

049072560

ABSTRACT:
Disclosed is an exchange system having an originating call restriction function comprising a unit for counting originating calls, a unit for counting incoming calls, a storage unit for storing a number (N.sub.o) or originating calls that can be accepted from accommodated subscribers (111) within a predetermined period, storage unit for storing a number (N.sub.i) of incoming calls that can be accepted within a predetermined period, and a unit for correcting the number of calls that can be accepted. The correction of the number of calls that can be accepted is effected by comparing the number (N.sub.i) of incoming calls that can be accepted and a number (N.sub.ai) of accepted incoming calls. When the difference between the number (N.sub.i) of incoming calls that can be accepted and the number (N.sub.ai) of accepted incoming calls is decreased below a predetermined value, the number (N.sub.o) of originating calls that can be accepted is decreased by a predetermined correcting value (.alpha.), and the number (N.sub.i) of incoming calls that can be accepted is increased by the correcting value (.alpha.), Whereby, when there is processing congestion, the incoming call restriction level is relaxed and the originating call restriction level is increased. 7

REFERENCES:
patent: 4199665 (1980-04-01), Emrick et al.
patent: 4626625 (1986-12-01), Daisenberger
L. Burkard et al., Customer Behavior and Unexpected Dial Tone Delay, 10th International Traffic Conference, Session 2.4 paper #5.

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