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1152700 • Issue 1 • February 2001 • Section 2 Operation and Maintenance
Page 2-262
© 2000, ADC Telecommunications, Inc.
DLP-757
Page 3 of 3
Table 757-1. Shelf Controller Status Definitions, Continued
ITEM STATUS DEFINITION ACTION
Synchronization
State
Locked
Unlocked
Card is currently in sync with the
reference source.
Card is not currently in sync with
reference source.
No action required.
Allow a minimum of 5
minutes for cards to sync up
to reference, then check
configuration and monitor
source.
Alarms
Acknowledged
No
Yes
Alarm Cut Off condition is not
currently active.
Alarm Cut Off has been initiated to
silence audible alarms.
No action required.
ACO will deactivate upon a
new alarm condition. Ativate
if required per DLP-776 .
Timing
Reference
DB7
DB8
Both Buses
None
SC is providing clock for cell bus
7.
SC is providing clock for Cell bus
8.
SC is providing clock for both cell
buses.
SC is not providing clock reference
to any cell bus.
No action required. If a card
will be removed, it is best to
perform a switch over to the
stand-by card first. Refer to
DLP-771.
TX
Synchronization
Signal Status
ST3
PRS
STU
ST2
SMC
DUS
Non-Configurable. Indicates the
quality of the SC clock signal to
the shelf. TX Sync Status should
match RX Sync Status if SC is
locked to the timing reference.
Status will show DUS while it is
acquiring to the reference, and
transmit ST3 while in holdover.
No action required. To select
a different timing source,
refer to DLP-749.
Table 757-2. Timing Reference Status Definitions
STATUS DEFINITION
PRC
PRS
SEC
SSU
ST1
STU
ST2
ST3
SMC
DUS
SDH Primary Reference Clock
Primary Reference Source
SDH Equipment Clock Traceable
SDH Sync Supply Unit Traceable
Stratum 1 level source
Synchronized Traceability Unknown
Stratum 2 level source
Stratum 3 level source
SONET Minimum level Clock
Reference cannot be used for source