Call progress detection circuitry and method

Details Call progress detection circuitry and method Call progress detection circuitry and method

1993-07-13

1994-05-10

Dwyer, James L.

Multiplex communications

Pathfinding or routing

Through a circuit switch

379386, 379382, H04M 100

Patent

active

053115880

ABSTRACT:
There is disclosed a method and system for determining the progress of a calling connection. The system measures the peak voltage of the signals on the line and derives a ratio of these peak signals to the average value of the signal. From this ratio a determination is made as to the calling condition of the line.

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patent: 4864605 (1989-09-01), Ramsay et al.
patent: 4979214 (1990-12-01), Hamilton
patent: 5070526 (1991-12-01), Richmond et al.

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