Telephone filter arrangement

Details Telephone filter arrangement Telephone filter arrangement

H - Electricity

04

M

H04M 1/74 (2006.01) H04M 1/72 (2006.01) H04M 11/06 (2006.01)

Patent

CA 2306045

A subscriber's telephone installation comprises a plurality of telephone sets coupled in parallel to a subscriber loop so as to provide a voice facility, and a data modem coupled to the subscriber loop so as to provide data facilities at a frequency above that employed for said voice facility. Each telephone set is provided with a respective filter arrangement incorporating series connected inductive and parallel connected capacitive elements for rejecting selected frequencies from the telephone set. The filter also incorporates a switch responsive to current drawn from the line for selectively enabling and disabling the filter arrangement when the telephone set is respectively in its off-hook condition or in its on-hook condition.

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