Cordless telephone network

Details Cordless telephone network Cordless telephone network

1987-12-23

1989-10-31

Lev, Robert

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, H04M 1100

Patent

active

048782386

ABSTRACT:
A cordless telephone network comprises a base unit (12) that is interconnected into a normal telephone network (19) and a plurality of hand-held cordless telephones (20). Each of the hand-held cordless telephones has a distinctive identification code and the base unit temporarily stores the identification code of the hand-held unit with which it is communicating during a call and will not communicate with other hand-held units having different identification codes during that call. Each of the hand-held units has the ability to scan a plurality of cordless telephone channels for either receiving a call on a channel on which its identification code is transmitted or placing a call on a channel on which a base unit transmits a "free channel" signal. The hand-held units each have a voice activation/deactivation circuit which allows the hand-held unit to send and receive audio signals only when it has been given permission to do so by a base unit.

REFERENCES:
patent: 3366744 (1968-01-01), Miller
patent: 3449750 (1969-06-01), Sweigert
patent: 3535689 (1970-10-01), Oden
patent: 3557312 (1971-01-01), Vogelman et al.
patent: 4032723 (1977-06-01), Mendoza
patent: 4053717 (1977-10-01), Snider
patent: 4291197 (1981-09-01), Yonaga
patent: 4679225 (1987-07-01), Higashiyama
patent: 4700375 (1987-10-01), Reed
patent: 4731812 (1988-03-01), Akerberg
patent: 4736404 (1988-04-01), Anglikowski et al.
patent: 4742560 (1988-05-01), Arai
Sony, Cordless Telephone SPP-100.
Electronic Engineering Times, 12-14-87, p. 25, "Britain Offers Digital Cordless Phone Service".
Telecommunications, 1-88(Not Prior Art), pp. 63-67, "The Cordless Connection".
Communications Systems Wordwide, Feb. 1988, pp. 26-28, "Cordless Phones: Out on the Streets", (Not Prior Art).
Federal Communications Commission, 47 CFR Ch 1 (10-1-85 ed.), 815,232, "Interim Frequencies for Cordless Telephones".

Affiliated with

Also associated with

Rating

Cordless telephone network does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-630755