The OC3 IR 4/STM1 SH 1310 card provides four intermediate or short range, ITU-T G.707-, ITU-T G.957- compliant, SDH STM-1 ports. Each port operates at 155.52 MBits/s (Mbps) over a single-mode fiber span. The card supports concatenated or non-concatenated payloads at the STM-1 signal level on a per VC-4 basis.You can install the OC3 IR 4/STM1 SH 1310 card in any multispeed or high-speed card slot. The card can be provisioned as part of a SNCP or in an Add/drop multiplexer/terminal monitor (ADM/TM) configuration. Each interface features a 1310 nm laser and contains a transmit and receive connector (labeled) on the card faceplate. The card uses SC connectors. The OC3 IR 4/STM1 SH 1310 card supports 1+1 unidirectional and bidirectional protection switching. You can provision protection on a per port basis.This product is designed for Cisco ONS 15454 SDH Multi-Service Platform.