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3Com Router 5000 and Router 6000 v2.41
Module Guide
Chapter 4 Flexible Interface Cards (Router 6000)
4-57
Note that following alarms can be indicated by LP/ALM blinking on:
SDH/SONET
Layer
Alarm Type
section layer LOS, LOF, OOF
line layer AIS, RDI
path layer LOP, AIS, RDI
Note：if pos interface is shutdown, both LINK/ACT and LP/ALM will be off. Interface Optical Fiber
Like the FICCPOS, the Router 1-Port OC3 POS FIC uses optical fibers with LC-type
connectors (see Error! Reference source not found.).
4.18.4 Connecting the Interface Optical Fiber
Step 1: Insert the SFP card into its corresponding slot.
Step 2: Locate the Rx and Tx fiber-optic interfaces on the interface card. Use two
fibers to connect the Router 1-Port OC3 POS FIC to another device: Rx to Tx and Tx
to Rx.
Step 3: Power on the device and check the LINK LED on the Router 1-Port OC3 POS
FIC panel: ON means the Rx link is present and OFF means the opposite. In the latter
case, check the line status.
Warning:
Because invisible laser radiation may be emitted from the aperture of an optical port when no fiber is
connected or the dust cap is removed, do not stare into the open aperture.
Replace the dust cap when no fiber is connected to the optical port.
4.19 Router 2-Port FXS/2-Port FXO FIC and Router 4-Port
FXS/4-Port FXO FIC
4.19.1 Introduction
The 2-/4-port voice subscriber circuit interface card, processes and transmits over
data communications networks voice signals for 2/4 regular analog phones, faxes, or
AT0 loop trunks of telephone exchanges.