Dial verifier, especially for facsimile transmission

Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy

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Details

216355, H04M 1100

Patent

active

061012459

ABSTRACT:
An apparatus and method for preventing misdialing of a telephone number, especially fit for facsimile transmission is provided. The invention operates by dialing precompiled control keys added to the telephone number. The control keys are compared against computed control keys and transmission is allowed or denied according to the match between the dialed and computed control keys. The invention may be implemented in software embedded within the dialing device, in a telephone switch, telephony router, or by a special apparatus inserted anywhere in the transmission path.

REFERENCES:
patent: 5357245 (1994-10-01), Hagiwara
patent: 5452099 (1995-09-01), Von Meister
patent: 5812657 (1998-09-01), Reding et al.

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