Hold detecting and control circuit for a key telephone system

Details Hold detecting and control circuit for a key telephone system Hold detecting and control circuit for a key telephone system

H - Electricity

04

M

379/33

H04M 9/00 (2006.01) H04M 3/22 (2006.01) H04M 3/428 (2006.01)

Patent

CA 1283986

HOLD DETECTING AND CONTROL CIRCUIT FOR A KEY TELEPHONE SYSTEM ABSTRACT OF THE DISCLOSURE A key telephone system for use with at least two telephone lines that extend between a central office and two or more telephone stations. Each station is capable of responding to a manually-actuated hold select switch by establishing a hold condition on one of the lines and by connecting a line terminating impedance across the line that is to be held. Each station is further capable of monitoring the state of each line, and indicating the state of each line, without applying any indicating signals to the telephone lines. Each station furthermore determines threshold voltages for on-hook, off-hook and hold line states and determines line state by comparison of line voltage with such threshold voltages.

560528

Affiliated with

Also associated with

Rating

Hold detecting and control circuit for a key 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 Hold detecting and control circuit for a key telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hold detecting and control circuit for a key telephone system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1181503