OXADM Multiplex Protection Scheme for Bidirectional Path Switched Ring

This paper describes our recent approach toward advanced optical layer networks through the development of optical cross add and drop multiplexing (OXADM). The OXADM node focuses on providing functionally such as transport, multiplexing, routing, supervision, terminating and survivability in optical layer with ring and mesh topologies. OXADM provide survivability through restoration against failures by means of multiplex protection for BPSR configuration. Restoration schemes in OXADM node are more reliable and more efficient compare to conventional OADM and OXC device due to internally routing mechanisms and no 'drop and re-add function' is needed to route the signal to alternative path or processed the signals in both electronic and optical domain as practice in conventional nodes today (1). No difference in output power and BER as compare to pass through signal. The network has undergone performance test at 2.5 Gbps (OC-48) with BER less than 10 -9 .