Telephonic communications – Private or single line system – Doorbell system
Patent
1999-03-30
2000-05-02
Kuntz, Curtis A.
Telephonic communications
Private or single line system
Doorbell system
379171, H04M 160
Patent
active
060581743
ABSTRACT:
A semi-automatic or a fully automatic intercom system. These intercom systems are hardwired intercom systems which cannot be used with telephone lines. The semi-automatic intercom system can be used with any kind of lobby panel including a lobby panel equipped with a keypad and an electronics board. The fully automatic intercom system according to the invention can be used only with a lobby panel equipped with a keypad and an electronics board. The fully automatic system can automatically disconnect a shorted out apartment unit from the system and restore the building to service immediately.
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Barnie Rexford N.
Kuntz Curtis A.
Litman Richard C.
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