Switching network

Details Switching network Switching network

H - Electricity

04

J

344/26

H04J 3/00 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1267711

F.H. Rees 31 SWITCHING NETWORK Abstract of the Disclosure A telephone exchange, now often called a switch includes a switching network of the space division type which switches PCM highways, and includes a number of sub-networks (SEG1, SEG2 ... SEGN) each of which is a plural (e.g. three) stage array. When a call is to be set up it is set up via one of these sub-networks, and a reserve path chosen for it through a different sub-network. The identity of this reserve path is noted in memory for use if the path via which the connection is actually set up fails. If that happens the call is switched to the reserve path. This facility can also be used for "block transfers" of all calls in a sub-network, e.g. when the latter is taken out of service for maintenance. In one embodiment in which three stages are used, part at least of the middle stage is common to all sub-networks. Such an apparently large amount of switching cross-points is not too "cost ineffective" since the switching sub-networks are made up of relatively cheap VLSI units. Since the physical paths are e.g. PCM-TDM highways which thus carry heavy traffic such precautions to maintain high system integrity are well worthwhile.

533507

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1313063