Testing facility for telephone conference bridge

Details Testing facility for telephone conference bridge Testing facility for telephone conference bridge

1981-05-19

1982-07-06

Robinson, Thomas A.

H04M 500

Patent

active

043384960

ABSTRACT:
A passive conference bridge is coupled to telephone lines through pairs of panel mounted plug-in jacks to establish conference call connections with balanced input/output impedances. Test equipment is plugged into the jacks for connection to the bridge circuit and/or telephone lines. The telephone lines are disconnected from a leg of the bridge circuit through one of the jacks of each pair and a terminating resistor is thereby inserted into the disconnected bridge leg.

REFERENCES:
patent: 2237666 (1941-04-01), Hanson et al.
patent: 3699284 (1972-10-01), Anderson

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