Self-testing system and method

Details Self-testing system and method Self-testing system and method

2006-05-30

2006-05-30

Trieu, Van T. (Department: 2636)

Communications: electrical

Condition responsive indicating system

With particular system function

C340S515000, C340S516000

Reexamination Certificate

active

07053766

ABSTRACT:
Newly installed electrical units emit, for a brief install interval, an “installed” output either audibly or visually, or both in response to an install mode input signal. After the install interval, the “installed” output ceases. As more units are installed, the earliest installed units remain silent in the presence of the install mode input signal.

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