Cisco GS7000 Installation And Operation Manual page 79

Note: The transponder core module can be seen through the Heart
Beat/Receive/Error indicator cutout in the cover.
Local Control Module Description
The local control module locally monitors the following node voltages and signals:

Receiver optical input level (all receivers)

Transmitter optical output level (all transmitters)

AC power presence and peak voltage (for split AC powering cases, AC
power from both sides of node housing is monitored)

DC voltages from both primary and redundant power supplies

Optical amplifier operating parameters

Optical switch operating parameters
The local control module communicates serially with the RF amplifier module to
control the optional forward band redundancy switches on the forward
Local Control Module
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