Clear "inc. DS1/E1 sync. ref." alarms

Procedure 5-40: Clear "inc. DS1/E1 sync. ref." alarms

Overview

This procedure is used to clear the following alarms:

inc. DS1 sync. ref. AIS
inc. DS1 sync. ref. BER
inc. DS1 sync. ref. EOOF
inc. DS1 sync. ref. LOF
inc. DS1 sync. ref. LOS
inc. DS1 sync. ref. OOL
inc. E1 sync. ref. AIS
inc. E1 sync. ref. BER
inc. E1 sync. ref. CRC-4 MFA mismatch
inc. E1 sync. ref. LOF
inc. E1 sync. ref. LOS
inc. E1 sync. ref. OOL

Before you begin

Prior to performing this procedure:

Refer to Before you begin and Required equipment in this chapter.
Refer to Electrostatic discharge in Chapter 1, Safety.
Select View → Equipment to determine if the Main slots are equipped with Very Large Fabric circuit packs.

Steps

Complete the following steps to clear an inc. DS1/E1 sync. ref alarm.

From the WaveStar^® CIT System View, click the Alarm List button and locate the inc. DS1/E1 sync. ref alarm in the resulting alarm list and note the corresponding AID.

Is the alarm inc. DS1 sync. ref. EOOF?

If...	Then...
Yes	No action necessary, alarm automatically clears at midnight.
No	Continue with the next step.

Is the alarm inc. DS1/E1 sync. ref. OOL?

If...

Then...

Yes and the Main slots are not equipped with Very Large Fabric (VLF) circuit packs

Perform the following:

Repair the Timing references according to local procedures.
From the System View, select Configuration → Update System → Update Reference.

Result:

A dialog box appears asking you to confirm executing this command. Click Yes.

STOP! End of Procedure.

Yes and the Main slots are equipped with Very Large Fabric (VLF) circuit packs

Proceed to Step 6.

Continue with the next step.

Is the alarm inc. E1 sync. ref. CRC-4 MFA mismatch?

If...	Then...
Yes	Continue with the next step.
No	Proceed to Step 6.

To clear the inc. E1 sync. ref. CRC-4 MFA mismatch alarm, either change the format of the incoming E1 synchronization reference signal to CRC-4 or change the format of the local E1 timing input port to FAS (Frame Alignment Signal) according to local procedures.

If changing the format of the...

Then...

incoming E1 synchronization reference signal,

notify personnel at the site supplying the E1 synchronization reference signal to change the format to CRC-4.

local E1 timing input port,

Use Configuration → Timing/Sync to access the Timing Input port and provision the Input and Output Format parameter to FAS.

Result: Click OK. A warning message may appear. Click Yes to execute the command.

STOP! End of Procedure.

Important!

Perform the following to clear inc. sync. ref. AIS, inc. DS1/E1 sync. ref. BER, inc. DS1/E1 sync. ref. LOF, and inc. DS1/E1 sync. ref. LOS alarms. This also includes inc. DS1/E1 sync. ref. OOL alarms (VLF mains only).

Visually check the incoming signal cables and connections and correct any problems found. If a visual inspection does not reveal any problems, you may consider making electrical measurements per local procedures.

From the System View, click the Alarm List button and click Refresh.

Is the inc. DS1/E1 sync. ref alarm still present?

If...	Then...
Yes	Continue with the next step.
No	STOP! End of Procedure.

Follow local procedures to isolate and repair the trouble.

End of steps