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© 2001-2008 Calix. All Rights Reserved.
Installing a Protection Block
The modular design of the cabinet's copper line protection system allows you to
incrementally expand line capacity in the field. A fully equipped C7 shelf (480 copper lines)
requires up to ten 50-pair protection blocks for line protection. The protection blocks reside
in mounting frames that each hold up to 10 protection blocks.
Note:
Each C7 slot is wired with a dead 25th pair. On the protection blocks, slot
identification labels cover the dead pair positions (25 and 50).
You can add protection blocks to expand system capacity. The protection system resides in
the copper splice compartment.
To install a protection block
1.
Unpack the protection block from the shipping packaging.
2.
On the back of the protection block, remove any cable ties that coil up the two pairs of
interface cables (two with MS
2
connectors, two with RJ-21 connectors), if present.
3.
Locate an open position on the protection mounting frame, then feed the protection
block's interface cables through the mounting frame into the area behind it. The
protection blocks are typically populated from left to right.
4.
Attach the protection block to the mounting frame as follows:
a.
Insert the tabs on the bottom of the protection block into the slots on the mounting
frame position.
b.
Pull down the spring-loaded plunger latch at the top of the protection block. While
holding the plunger down, rotate the block into the mounting frame. Release the
plunger latch to secure it in the frame.
c.
Fasten the protection block to the mounting frame using two supplied screws.
Note:
The screws provide a critical ground path through the mounting frame to the
cabinet's main ground bar.
