Security arrangement for cordless telephone system

Telephonic communications – Audio message storage – retrieval – or synthesis

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

379188, H04M 166, H04B 126

Patent

active

047364041

ABSTRACT:
A security system for cordless telephones prevents unauthorized telephone lls over telephone lines. The system includes a base unit and a cordless handset unit which must share common information for proper operation. To prevent an unauthorized user in possession of a handset unit from easily matching a security code stored in the base unit and thereby obtain dial tone therefrom, the security code in the base unit is transferred to the handset unit while the handset unit is in a mating cradle in the base unit. Transfer circuits in the base unit and the handset unit respectively transmit and receive the security code and also an operating frequency channel over a direct-current charging path provided for charging of a battery in the handset unit whenever the handset unit is returned to the cradle.

REFERENCES:
patent: 4436957 (1984-03-01), Mazza et al.
patent: 4467140 (1984-08-01), Fathauer et al.
patent: 4471166 (1984-09-01), Cripps
patent: 4535200 (1985-08-01), Himmelbauer et al.
patent: 4560832 (1985-12-01), Bond et al.
patent: 4593155 (1986-06-01), Hawkins

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Security arrangement for cordless telephone system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Security arrangement for cordless telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security arrangement for cordless telephone system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2238900

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.