Apparatus and method for determining incoming call destination w

Details Apparatus and method for determining incoming call destination w Apparatus and method for determining incoming call destination w

1990-10-24

1992-03-03

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379102, H04M 1100

Patent

active

050938568

ABSTRACT:
At a telephone subscriber's premises, call identification apparatus is used to determine whether incoming calls are intended for a primary telephone station or for a secondary telephone station. The call identification apparatus monitors electrical signals present on a telephone line after the call has been answered by one of the secondary telephone stations in search of a predetermined identificattion signal. In response to the presence of the identification signal from an originating source, the apparatus disconnects all secondary stations from the telephone line, terminates the incoming call by hanging up, and dials a predetermined telephone number. After dialing the predetermined number, an authentication procedure is invoked which requires that the dialed station transmit a security code to the apparatus. If the dialed station incorrectly transmits the security code more than N times, the call is terminated. Illustratively, the primary station comprises a home security system plus the call identification apparatus within a single unit.

REFERENCES:
patent: 4097696 (1978-06-01), Nyhuis et al.
patent: 4394540 (1983-07-01), Willis et al.
patent: 4477697 (1984-10-01), Judd et al.
patent: 4520233 (1985-05-01), Smith
patent: 4546213 (1985-10-01), Dick
patent: 4582956 (1986-04-01), Doughty
patent: 4660218 (1987-04-01), Hashimoto
patent: 4791658 (1988-12-01), Simon et al.
patent: 4949372 (1990-08-01), Steele
J. Holmes, "Securing Dial-Up Networks", Telecommunications, Mar. 1984, pp. 84, 124.

Affiliated with

Also associated with

Rating

Apparatus and method for determining incoming call destination w does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for determining incoming call destination w, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for determining incoming call destination w will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-277453