ADC Release 3.1 user manual DB7 DB8, ST3 PRS STU ST2 SMC DUS, Timing Reference Status Definitions

1152700 • Issue 1 • February 2001 • Section 2 Operation and Maintenance

Page 3 of 3

DLP-757

Table 757-1. Shelf Controller Status Definitions, Continued

ITEM

Synchronization State

Alarms Acknowledged

Timing

Reference

TX

Synchronization

Signal Status

STATUS

Locked

Unlocked

No

Yes

DB7

DB8

Both Buses

None

ST3

PRS

STU

ST2

SMC

DUS

DEFINITION

Card is currently in sync with the reference source.

Card is not currently in sync with reference source.

Alarm Cut Off condition is not currently active.

Alarm Cut Off has been initiated to silence audible alarms.

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.

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.

ACTION

No action required.

Allow a minimum of 5 minutes for cards to sync up to reference, then check configuration and monitor source.

No action required.

ACO will deactivate upon a new alarm condition. Ativate if required per DLP-776 .

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.

No action required. To select a different timing source, refer to DLP-749.

Table 757-2. Timing Reference Status Definitions

STATUS

PRC

PRS

SEC

SSU

ST1

STU

ST2

ST3

SMC

DUS

DEFINITION

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

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