Telephone call monitoring apparatus

Details Telephone call monitoring apparatus Telephone call monitoring apparatus

1981-04-13

1983-09-13

Rubinson, G. Z.

H04M 1508, H04M 1518, H04M 1522, H04M 1530

Patent

active

044044330

ABSTRACT:
A telephone call monitoring apparatus is described for monitoring a subscriber's telephone to determine the time of day in which incoming or outgoing telephone calls are made and the duration of the calls. Additionally the apparatus determines and records the telephone number of the "called" telephone. The apparatus is responsive to the frequency, duration and pause between ring back signals placed on the telephone to determine the estimated time that the call is answered by the called telephone.

REFERENCES:
patent: 3546381 (1970-12-01), Foley et al.
patent: 3718778 (1973-02-01), Anderson
patent: 3725947 (1973-04-01), Albertini et al.
patent: 3806652 (1974-04-01), Woolf et al.
patent: 4028493 (1977-06-01), Brennemann et al.
patent: 4045619 (1977-08-01), Harrington
patent: 4122308 (1978-10-01), Weinberger et al.

Affiliated with

Also associated with

Rating

Telephone call monitoring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone call monitoring apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone call monitoring apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1731658