112The FIC-1POS uses the protocols such as PPP, Frame Relay and HDLC at the data link layer and IPat the network layer. It allows direct transmission of packets over SONET/SDH. It supports:• Various types of transceiver modules• 155.52 Mbps fractional interfaceInterface specificationsTable 156 Interface specificationsItem DescriptionConnector SFP/LCInterface standard SONET OC-3/SDH STM-1Number of interfaces 1Interface rate 155.52 MbpsInterface LEDsFigure 125 FIC-1POS panelTable 157 LED descriptionLED DescriptionLINK/ACT• On: Carrier signal has been received.• Flashing: Data is being received or/and transmitted.• Off: No carrier signal has been received.LP/AL• On: The interface is in a loopback.• Off: No loopback or alarm is present.• Flashing: An alarm indication signal (AIS), loss of frame alignment (LFA) signal,or remote alarm indication (RAI) signal is present.Transceiver modules, optical fibers, and connection methodsFor more information about transceiver modules, optical fibers, and the connection methods, see"Fiber port."CPOS (SDH/SONET) interface module• FIC-1CPOS
