Telegraphy – Systems – Line-clearing and circuit maintenance
Patent
1976-07-06
1978-04-25
Griffin, Robert L.
Telegraphy
Systems
Line-clearing and circuit maintenance
343178, 325 21, H04L 700
Patent
active
040864294
ABSTRACT:
A synchronizing circuit for use in time division simultaneous telecommunication for attaining synchronized alternate transmission and reception of aural signal between a calling station and a called station at a predetermined rate of time division. The synchronizing circuit is provided in each of the calling and called stations, and comprises first detecting means for detecting transmission of an aural signal from the called station, second detecting means for detecting transmission of an aural signal from the calling station, and means for energizing the transmitter in the calling station while locking the receiver in the calling station when the first detecting means is not detecting an aural signal transmitted from the called station and the second detecting means is detecting an aural signal being transmitted from the calling station, and locking the transmitter in the calling station while energizing the receiver in the calling station upon lapse of a predetermined period of time corresponding to the period of time division. The transmitter in the calling station is locked and the receiver in the calling station energized to receive an aural signal transmitted from the called station whenever the first detecting means is detecting such signal, and the transmitter in the calling station is automatically released from the locked state upon cessation of reception of the signal from the called station due to the lapse of the allotted period of time, corresponding to the period of time division so that synchronized alternate signal transmission and reception can be attained.
REFERENCES:
patent: 2498635 (1950-02-01), Bailey
patent: 2532310 (1950-12-01), Homrighous
patent: 2657304 (1953-10-01), Parks
patent: 3267427 (1966-08-01), Hoek
patent: 3584301 (1971-06-01), Tomaszewski
patent: 3896379 (1975-07-01), Voss et al.
Hayashi Setsuo
Kotezawa Katsutaka
Onodera Toshimi
Shimanuki Fujio
Chiba Communications Industries, Inc.
Griffin Robert L.
Masinick Michael A.
LandOfFree
Synchronizing system for use in telecommunication does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronizing system for use in telecommunication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronizing system for use in telecommunication will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2420859