ATIS T1.TR.31-1994

This Technical Report addresses the effect that protection diversity routing in Synchronous Optical NETwork (SONET) rings may have on voice transmission quality. Rural rings can be several hundred miles in circumference and, under diversity routing conditions, additional network nodes and path length can cause a significant increase in transmission and signal processing delay. This could affect echo performance and echo canceler operation on intraLATA calls, interLATA calls or both.