Managing High-Density Cabling - Nortel Passport 15000 Preparation Manual

40 Chapter 2 Planning considerations

Managing high-density cabling

241-1501-205 5.2S2
high-density cabling. A pair of plastic cable management brackets are used to
accommodate both coax and fiber high-density. The optional left-side or
right-side extended cable management brackets support very high-density
coax cabling. The extended brackets are needed when a switch has high-
capacity electrical FPs, for example, when greater than nine 12-port DS3s are
provisioned in a NEBS 2000 frame or equivalent. High-density optical
brackets are needed when a switch has high-capacity optical FPs such as the
16-port OC-3/STM-1 FPs.
To plan cable management for Passport 15000 and Passport 20000 switches
with high-density cabling, do the following:
• review background information on managing telecom cables in
241-1501-200 Passport 15000, 20000 Hardware Description
• review the description of high-density cable management brackets in
241-1501-200 Passport 15000, 20000 Hardware Description
• review cable and connection specifications for the types of cables you are
planning to install. Cable specifications are listed in 241-1501-200
Passport 15000, 20000 Hardware Description
• review basic cable handing guidelines listed in the best practices section
of 241-1501-240 Passport 15000, 20000 Hardware Installation,
Maintenance and Upgrade
• ensure that the installer is familiar with the task flows and procedures for
routing high-density cables listed in 241-1501-240 Passport 15000,
20000 Hardware Installation, Maintenance and Upgrade
Example high-density routing calculation
This example of a high-density routing calculation demonstrates how the
capacity of cable management brackets and troughs are determined for a
switch populated with 16-port-OC-3 FPs. Two versions of this FP are
discussed.
Note: The following section is an example of routing capacity
calculations. The calculations for any specific site will vary depending on
the type and number of high-capacity FPs used.
The following FPs are used in this example.