Lucent DDM-2000 OC-3 User And Service Manual page 256

NTP-026
: Circuit Order
Page 8 of 10
DO ITEMS BELOW IN ORDER LISTED. . . . . FOR DETAILS, GO TO
12.
NOTE:
Cutting the main sync source will cause the line-timed node
to go into holdover.
Verify that only minor nsa OC-3 LOS or minor nsa OC-12
LOS and nsa inc. VT/STS1 AIS alarms are present at each
end of the fiber cut.
13.
NOTE:
If line timing mode is specified or external timing mode is
specified but the timing reference was not available at new
shelf turnup, the new shelf TGS/TG3 option switches are
probably set for free running . Before the end-to-end system
is established, the specified timing mode must be set on the
TGS/TG3 circuit pack.
NOTE:
If the option switch setting is changed, an update must be
done by momentarily depressing the UPD/INIT button on the
SYSCTL after the TGS/TG3 circuit packs are reinstalled.
NOTE:
If external timing is selected and the NE ACTY LED remains
lighted after the TGS/TG3 circuit pack is reinserted, use the
CIT and the rtrv-sync command to check the operational
mode of the system. If the mode is Holdover instead of
External, check that the incoming timing references are
connected.
Set timing mode on new shelf TGS/TG3 to the timing mode
specified in work order or office records.
14.
NOTE:
The Network Side/User Side parameters of the
set-fecom: command must be set opposite at each end of
the optical spans.
Use the rtrv-fecom/set-fecom command to verify/set
Network Side/User Side parameters at each end of optical span
being established.
15. At new shelf, remove OLIU optical loops.
DDM-2000 OC-3 M
Issue 2, February 2000
ULTIPLEXER
363-206-285
DLP-513