Patent ID: 6421318
Filing Date: 2002-07-16
Classification: H04J,H04Q

Abstract:
Improvements in a fiber optic synchronous digital hierarchy telecommunication network comprising:network elements comprising optical interfaces for receiving optical fibers; fiber optic spans interposed between the network elements to form a ring, each network element being connected to adjacent network elements through said fiber optic spans allowing a bidirectional communication therebetween with traffic protection; wherein said fiber optic spans comprise: at least two spans having a first number of fiber pairs; and at least one span having a second number of fiber pairs, the second number of fiber pairs being higher than the first number of fiber pairs, each span being independent of the others but nonetheless a part of the ring; further wherein said network elements comprise: at least one network element interposed between spans having said first number of fiber pairs; and at least one network element connected to a span having said second number of fiber pairs.