363-206-305 Circuit Order:
NTP-024
Issue 3, June 2000 Page 7 of 12
DDM-2000 F
IBER
R
EACH
W
IDEBAND
S
HELF
DO ITEMS BELOW IN ORDER LISTED . . . . FOR DETAILS, GO TO
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. Also check Mode Switching (revertive or
nonrevertive) and the external DS1 Line Code/Format
switch settings.
Set timing mode on OC-12 TGS/TG3 circuit packs to the timing
mode specified in work order or office records. ( 363-206-295,
DDM-2000 OC-12 Multiplexer, TARP Release 7, User/Service
Manual (TOP) - Volume II
, DLP- 510 or 363-206-285,
DDM-2000
OC-3 Multiplexer, TARP Release 13 and Later, User/Service
Manual (TOP) - Volume II
, DLP- 513)
11. Use the set-sync: command to provision the synchronization
mode switching, synchronization source, and output mode of
timing signals when the 28-Type or 29-Type OLIUs hardware is
provisioned to be line-timed. See the “Commands and Reports”
section of this manual for a description of the set-sync:
command format.
12.
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.
13. At new shelf, remove OLIU optical loops.
14. Determine the optical loss of the optical facility from office records
or by making the required measurements.
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