Automatic facsimile/data/voice switch

Details Automatic facsimile/data/voice switch Automatic facsimile/data/voice switch

1997-05-30

1999-02-09

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

37910015, H04M 1100

Patent

active

058704582

ABSTRACT:
An electronic device connecting a single telephone line conductor pair to voice, data modem, and facsimile equipment automatically detects the nature of each incoming call and switches the telephone line to the appropriate equipment connection without requiring human intervention. Incoming calls are classified by the detection or lack of detection of CNG and data modem reverse originate, or originate carrier signal evoked by sending mixed ringback and data answer carrier. The invention forwards distinctive ring and optionally detects, stores, and forwards Automatic caller Number Identification (ANI) signals to selected equipment. To protect incoming and outgoing calls from interruption, the invention provides busy signal to the devices not selected.

REFERENCES:
patent: 5471522 (1995-11-01), Sells et al.
patent: 5499287 (1996-03-01), Campbell et al.

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