Key telephone system

Details Key telephone system Key telephone system

H - Electricity

04

M

344/15, 379/16

H04M 3/02 (2006.01) H04M 3/48 (2006.01) H04M 3/58 (2006.01) H04M 9/00 (2006.01)

Patent

CA 1248252

Abstract of the Disclosure A key telephone system includes a plurality of key telephone sets having speakers and tone signal generators and communicating with each other through extension links. The key telephone system further includes a first memory, a second memory, a main CPU, a sub CPU, a MF signal generator, and a speech path switch. The first memory stores availability of the extension links. The main CPU discriminates whether all extension links are available according to the storage contents of the first memory in an extension call mode. The MF signal generator signals to a calling key telephone set that all the extension links are busy when the main CPU discriminates that all the extension links are busy. A second memory stores information on each calling and called key telephone sets upon the extension call in a state where the MF signal generator signals that all the extension links are busy. The main and sub CPUs cooperate to perform call control of the called key telephone set using the tone signal generator and the speaker in the called key telephone set according to information stored in the first and second memories.

514425

Affiliated with

Also associated with

Rating

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 Key telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key telephone system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1293411