A hybrid protection circuit (10) operatively couples a plurality of communication paths in ingress cables (12) to a plurality of communication paths in egress cables (13). A line selector (31) effects protection switching of communication paths in one cable relative to communication paths in another...http://www.google.com/patents/US6317426?utm_source=gb-gplus-sharePatent US6317426 - Method and apparatus for hybrid protection in a switching network
