Installation Manual

Corning Optical Communications
Installation Manual
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CMA-793-AEN
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Page
47
Optical Indicator
Each pair (2) of optical module cages has four LED indicator arrows. The two on the left are green, and the two on the
right are red, as shown in Figure below. The indicator arrows represent the synchronization status of the upper and lower
optical modules. When a pair of optical modules are synchronized (both uplink and downlink), the indicators turn green as
shown in the right pair of indicators in Figure below. When the optical module is unplugged or not synchronized, the
indicators are red, as shown in the left pair of indicators. Check whether both indicators turn green after connecting one
pair of optical modules. If the indicators are red, the terminal has not synchronized.