Cable Strain Relief; Preparing The Work Area - Cisco 7513 Series Replacement Instructions Manual

Cable Strain Relief

If possible, position the new replacement chassis close enough to the existing system so that you can
avoid having to disconnect power and interface cables. Be sure to disengage any strain relief devices
before attempting to pull the cables from the port. Following are descriptions of the different
methods of strain relief that are used on the AC-input and DC-input power cables and the various
types of network interface cables:
•
On the AC power input receptacle (on the interface processor end of the AC-input powered
chassis), a cable retention band snaps up around the plug on the power cable to prevent it from
being inadvertently pulled out of the receptacle.
•
On the DC-input power supply, nylon cable ties are used to fasten the power cable to a bracket
located just to the right of the input terminal block. Carefully cut these cable ties before you
disconnect the power cable leads from the terminal block; replace the cable ties after you install
the new chassis, and wire the power cable leads to the terminal block.
•
Serial interface cables (all types) use thumbscrews on the cable connectors that secure the cable
to the Fast-Serial Interface Processor (FSIP) port.
•
Ethernet interface cables use either slide-type locks or thumbscrews. Although all Ethernet
Interface Processors (EIPs) ship from the factory with slide-type locks on each port, all EIPs also
include conversion kits for replacing the slide-type locks with jackscrews to accommodate
Ethernet interface cables with thumbscrews.
•
Multimode, FDDI connectors use small plastic arms on two sides of the connector that act like
springs and are constrained by the inside of the connector port. To remove a multimode cable
from an FDDI Interface Processor (FIP) port, pinch the two plastic arms inward while pulling the
connector out of the port.
When removing any cable, pull the cable out at the connector; never pull or tug on the cable itself.
For detailed descriptions of the system components, refer to the Cisco 7513 Hardware Installation
and Maintenance publication.

Preparing the Work Area

Although some network downtime is unavoidable while you remove the RP and SP (or SSP) or
RSP1 from their respective chassis, and replace them in the new chassis, you can minimize the
downtime by placing the old and new chassis close together. If your existing chassis is mounted in
a rack and there is space in the same rack or another rack close by, we recommend that you install
the new, empty chassis in the rack before moving the components. (A fully configured chassis
weighs approximately 160 pounds.)
Before installing the chassis in a new rack location, ensure that routing the interface cables to the
new positions will not strain or tangle them.
You can further minimize downtime by leaving interface cables attached when you move interface
processors to the new chassis, provided that doing so will not strain the cables.
Cisco 7513 Chassis Replacement Instructions
Prerequisites
5