111Interface specificationsTable 154 Interface specificationsItem DescriptionNumber of interfaces 1Connector type SFP/LCInterface standard SONET OC-3/SDH STM-1Operating mode 155 MbpsInterface LEDsFigure 124 FIC-1ATM-OC3 panelTable 155 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."POS (SDH/SONET) interface module• FIC-1POSFIC-1POSIntroductionThe 1-port SDH/SONET interface module (FIC-1POS) supports interface rates up to 155.52 Mbps(STM-1/OC-3).
