Interswitch line circuit

Details Interswitch line circuit Interswitch line circuit

1984-10-29

1988-03-15

Ng, Jin F.

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

307236, 328118, 379382, H04M 322

Patent

active

047318279

ABSTRACT:
A tip-ring interface that utilizes a single detector to detect ringing, forward loop current, and reverse loop current. In one embodiment, forward or reverse battery state may be detected when on-hook.

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patent: 4524246 (1985-06-01), Meza
patent: 4540853 (1985-09-01), Albouy
patent: 4570034 (1986-02-01), Serrano
patent: 4580011 (1986-04-01), Glaser

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