TC1720
(Optional Dual Optics)
User's Manual
Rev. 1.4
-11-
Optic Cable Verification
If the "Rx-A" LED on the front panel is flashing (or off), this is an indication that the optic signal is not being
correctly received. Usually, unsecured fiber optic connectors or faulty cable are to blame. A good
connection is indicated by the "Rx-A" LED on the front panel being solidly lit. This indicates that the receiving
cable is correctly connected to the remote unit's optic "TxA."
On Dual Optics Models, the same applies to "RxB" and "TxB." Dual Optics Models will automatically switch
to optic "RxB" if optic "RxA" is not receiving a valid signal. This automatic switchover enables the user to
verify the "B" fiber connection by simply disconnecting the "A" fiber connection, thereby verifying the optical
redundancy capability of the unit. (Dual Optics is an optional feature).