Lucent Technologies SLC 5 Series - Install Channel Test Unit (CTU)

363-205-401 Conversions:
Issue 7, March 1997 Page 1 of 4
DLP-503
Install Channel Test Unit (CTU)
1. Get one
AUB22
(PGTC) or
AUB25
(PGTC with compatible version BCU or
XTC)
CTU
and inspect for possible damage.
Reference:
DLP-500
2. Insert
CTU
into
CTU
slot in blue (lower) channel bank while observing indica-
tors on
CTU
faceplate.
Response:
CTU FAIL
indicator is lighted and
BUSY
indicator flashes.
3. Does
FAIL
indicator on
CTU
go off and remain off?
If
YES,
then proceed to Step
9.
If
NO,
then continue with Step
4.
4. Replace
CTU
.
5. While observing
FAIL
indicator on
CTU
faceplate, insert
CTU
into
CTU
slot in
blue (lower) channel bank shelf.
Response:
CTU FAIL
indicator lights momentarily.
6. Does
FAIL
indicator on
CTU
go off and remain off?
If
YES,
then proceed to Step
9.
If
NO,
then continue with Step
7.
7. Replace
CTU
with
CTU
removed previously while observing
FAIL
indicator
on
CTU
faceplate.
8. Check wiring using SD-7C117-01 or SD-7C117-02. Repeat procedure from
Step
3
after locating and correcting trouble.
9. Did
FAIL
indicator on
CTU
light momentarily?
If
YES,
then
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If
NO,
then continue with Step
10.
10. Replace
CTU
while observing
FAIL
indicator on
CTU
faceplate.