Nortel Passport 15000 Preparation Manual page 44

44 Chapter 2 Planning considerations
241-1501-205 5.2S2
High-density brackets are two molded plastic brackets each with part number
P0937935.
You must choose the number of optional extended brackets you will need
because the brackets cannot be installed before the frame is shipped. The
number of needed brackets is determined by:
• the volumes of either kind of cable, for example, a switch full of 12-port
DS3s is 348 mini-coax cables and two switches is 700 FP cables
• the direction you plan to route the cables, up over the frame or down
under the floor, or both
• the starting point as a lower switch, an upper switch, or both
Up to four extended cable management brackets fit on each side of the NEBS
2000 frame. The bracket installation procedure identifies where the brackets
are fastened to the frame.
After choosing the number of brackets for each side of the frame, ensure that
the footprint of the frame is marked on the floor to accommodate the extended
brackets, especially if the frame is installed adjacent another frame. See
"When anchoring NEBS 2000 frames side-by-side" (page 116) and "Marking
the footprint and the anchor holes on the floor" (page 112).
For cable management on a Passport 15000 or 20000 switch, all coax cables
are typically routed to the right front side of the NEBS 2000 frame (facing the
front of the switch) and all fiber and CP cables are typically routed to the left.
Depending on the number of DS3 or E3 FPs, cable management can be made
easier to install, maintain, add to, or upgrade when the optional extended
cable management brackets are used.
To develop a cable routing plan, for specific FP types, such as 16-port OC-3
FPs, review the guidelines for routing high-density cables in 241-1501-240
Passport 15000, 20000 Hardware Installation, Maintenance and Upgrade.