188 CHAPTER 4: F LEXIBLE INTERFACE CARDSConnecting the InterfaceCablec CAUTION: By design, the FIC-1AT3 is protected against lightning strikes. Butwhen outdoor cabling is involved, you are recommended to add a special lightningarrester at the input end of the E3/T3 cable for better protection.Step 1: Connect the SMB connector of an E3/T3 cable to the Tx port on theFIC-1AT3 and another end to the Rx port on another device.Step 2: Connect the SMB connector of another E3/T3 cable to the Rx port on theFIC-1AT3 and another end to the Tx port on another device.Step 3: Check the behavior of the LINK LED on the FIC-1AT3 panel: OFF meansfault occurs on the line and the signal is out of synchronization. Check the linestatus.FIC-1ATM-OC3MM/FIC-1ATM-OC3SM/FIC-1ATM-OC3SMLIntroduction Three ATM fiber interface card options are available with your router:■ 1-port ATM 155 Mbps multi-mode fiber interface card (FIC-1ATM-OC3MM)■ 1-port ATM 155 Mbps single-mode fiber interface card (FIC-1ATM-OC3SM)■ 1-port ATM 155 Mbps single-mode long-haul fiber interface card(FIC-1ATM-OC3SML)They provide the following functions:■ 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 workingas DCE interface)■ Three test measures: local cell loopback, local payload loopback and remoteloopback.n For the ATM interface configuration procedures, refer to H3C MSR 20/30/50 SeriesRouters User Manual.Interface Attributes The following table describes the interface attributes of the ATM cards.Table 133 Interface attributes of the ATM cardsAttribute FIC-1ATM-OC3MM FIC-1ATM-OC3SM FIC-1ATM-OC3SMLFiber-optic connector SCNumber of connectors 1Interface standard SONET OC-3/SDH STM-1Interface rate 155 Mbps
