Calix ODC-3000, Руководство по установке

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Installing 5-Pin Protection Modules
To complete the circuit connections between the metallic outside plant cables and equipment
cables, you must install 5-pin protection modules into the protection blocks. The 5-pin
modules serve as fuses to protect the equipment from electrical surges on the lines.
Each protection block protects two slots in the C7 shelf, with each 5-pin position on the
block protecting one wire pair (one 2-wire circuit or half of a 4-wire circuit). Install a 5-pin
protection module into each position on the protection block that shall be equipped for
service. Use black modules for T0 circuits and red modules for T1 circuits. Refer to the
cabinet pair assignment list for more information.