110Item DescriptionInterface cable E3/T3 cable (75-ohm coaxial cables)Supported services ATM Traffic CBR, rt_VBR, nrt_VBR, UBRInterface LEDsFigure 123 FIC-1AT3 panelTable 153 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.Interface cables and the connection methodsFor more information about T3 interface cables and the connection methods, see "E3/T3 interface."FIC-1ATM-OC3IntroductionThe 1-port ATM 155 Mbps optical interface module (FIC-1ATM-OC3) provides the followingfunctions:• Two frame formats: SDH STM-1 and SONET OC-3• Scrambling in data transmission• Line clock (when working as DTE interface), and internal clock (when working as DCEinterface)• Three test measures: local cell loopback, local payload loopback and remote loopback
