Multifunctional analog trunk circuit

Details Multifunctional analog trunk circuit Multifunctional analog trunk circuit

2005-05-10

2005-05-10

Isen, Forester W. (Department: 2644)

Telephonic communications

Concentrator or trunk selector

C379S334000

Reexamination Certificate

active

06891947

ABSTRACT:
A multifunctional analog TRK circuit board is designed so as to serve as both loop, ground start, DID, E&M, ring down and both way TRK. Thus, the various analog TRK circuits are embodied in a single TRK board, thereby increasing productivity compared to the conventional system requiring separate TRK circuit boards. The multifunctional TRK circuit is selectively controlled to provide desired TRK functions.

REFERENCES:
patent: 4756018 (1988-07-01), Fujiwara

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