Making Customer Equipment Cables - Nortel 7400 Hardware Installation

382 Chapter 39 Hardware procedures

Making customer equipment cables

Prerequisites
Procedure steps
NN10600-175 6.1S2
Make customer equipment cables following this general procedure.
CAUTION
Risk of compromise to EMI rating
The shielded cables that you assemble must have a
braided shield. See the procedure, "Making a braided
shield" (page 379) Failure to properly construct
interface cable assemblies can compromise the EMI
rating and affect the product compliances.
• Ensure that you know the appropriate cable specifications, including
assembly parts, pinouts and standards to which a cable must comply. For
more information, see NN10600-170 Nortel Networks Multiservice
Switch 7400 Hardware Description.
• Ensure that you have assembled all required cable parts.
1 Assemble the cable according to the specifications in NN10600-170
Nortel Networks Multiservice Switch 7400 Hardware Description
your company operational procedures.
2 If you are making a shielded cable, make a braided shield. See the
procedure "Making a braided shield" (page 379).
3 Ground the cable according to site practices.
To avoid EMI problems, terminate shield grounds on equipment at the
Multiservice Switch end as well as the customer end. This assumes that
the equipment at both ends are properly grounded to avoid any ground
loop problems.
If necessary in order to avoid ground loops, you can terminate the shield
ground at one end only.
4 Test end-to-end connections with an ohmmeter set to the lowest
resistance range. Ensure that each connection is correct. Also ensure that
the connector pins are not shorted together or to the connector shield.
and