Method and apparatus for installing telephone intercom-voice mes

Details Method and apparatus for installing telephone intercom-voice mes Method and apparatus for installing telephone intercom-voice mes

1996-11-01

1998-07-21

Kuntz, Curtis

Telephonic communications

Private or single line system

Doorbell system

379169, 379 67, H04M 160, H04M 900, H04M 164, H04M 100

Patent

active

057844461

ABSTRACT:
A doorbell response system can be retrofit in an existing doorbell system without requiring the incorporation of new wiring in the existing doorbell system.

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