150-454-111-06
Appendix B - Technical Reference
HRE-454
February 25, 2000
53
HRE-454 M
AINTENANCE
This section covers various maintenance procedures for the HRE-454.
Splicing
Splicing consists of connecting the wire pairs of the HRE-454 cable stub to the main cable within the splice case.
“Pre-splicing Procedure” on page 53
“Splicing Procedure” on page 55
, and
“Post-splicing Procedure” on page 56
contain step-by-step procedures for preparing the stubs, which include:
•
Splicing into the main cable (pre-splice procedure)
•
Splicing the stubs into the main cable (splicing procedure)
•
Dressing and taping the final splice in the splice case (post-splice procedure)
Figure 25.
Cable Stub Construction
While performing these three splicing procedures, maintain cable pair integrity when splicing stub pairs into the
main cable. The T1 lines must have correct cable pair connection. However, the HDSL units will compensate if
cable pairs are reversed, but may give false indications when trouble occurs. Follow normal procedures as
required.
Pre-splicing Procedure
Perform the following to pre-splice the enclosure cable stub:
1
Strip a sufficient length of the outer jacket, aluminum shield, and mylar sheath from the cable stub.
Make sure you ground the HRE-454 enclosure before splicing the cable stubs into the main
cable. The grounding method in
(or an accepted local grounding
method) must be in effect at all times to safeguard personnel.
The HRE-454 comes with a screened cable stub that is pre-cut and capped. Refer to
for a view of the screened cable stub construction.
The cable butt is considered to be the end of the cable stub most distant from the enclosure.
