The OC48 IR 1310 card provides one intermediate-range, Telcordia-compliant, GR-253 SONET OC-48 port per card. Each port operates at 2.49 Gbps over a single-mode fiber span. The card supports VT and non-concatenated, or concatenated payloads at STS-1, STS-3c, STS-6c, STS-12c, or STS-48c signal levels.You can install the OC48 IR 1310 card in any high-speed card slot and provision the card as a drop or span card in a two-fiber or four-fiber BLSR, UPSR, or in an ADM (linear) configuration. The OC-48 port features a 1310 nm laser and contains a transmit and receive connector (labeled) on the card faceplate. The OC48 IR 1310 uses SC connectors. The card supports 1+1 unidirectional and bi-directional protection switching. The OC48 IR 1310 detects LOS, LOF, LOP, AIS-L, and RDI-L conditions. The card also counts section and line BIT errors.