Centrally controlled electronic telephone system having a custom

Details Centrally controlled electronic telephone system having a custom Centrally controlled electronic telephone system having a custom

1977-03-01

1978-08-08

Robinson, Thomas A.

179 18EB, 179 27CA, H04Q 352

Patent

active

041058747

ABSTRACT:
An electronic telephone switching system is described having peripheral units including a plurality of subscriber and line circuits, a plurality of trunk and tie line circuits, at least one attendant line circuit, a plurality of signaling tone receivers, and a plurality of link control circuits. Switching is carried out by a one wire speech path switching matrix and a one wire tone switching matrix. The system is centrally controlled and includes a central processing unit, a program memory, a scratch pad memory and a customer memory. Information, commands and addresses are communicated between the peripheral units and the central control and within the central control via bus lines. The bus lines between the peripheral units and the central control transmit data with lower rise time pulses than the bus lines interconnecting the coponents of the central control. Each electronic crosspoint switch has a two terminal conducting path and a control terminal for controlling the state of conduction of the conducting path. Different conducting path terminals of the speech path matrix and tone path matrix crosspoint switches are operated by the same peripheral link unit. The matrix coordinates to be operated are defined by polling the different peripheral units connected to the coordinates in question.

Affiliated with

Also associated with

Rating

Centrally controlled electronic telephone system having a custom does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Centrally controlled electronic telephone system having a custom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Centrally controlled electronic telephone system having a custom will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-920677