How to configure clocks on OSN 3500 (1)

A clock is the basis for the normal running of NEs. You must configure clocks for all NEs prior to configuring services. In addition, you need to configure clock protection for complex networks.

Configuring clocks on OSN 3500, OSN 7500, OSN 1500, you should need to do the following steps, we will show you how to configure the NE clock source this article.

1 Configuring the NE Clock Source

2 Configuring the Clock Source Protection

How to configure the NE clock source

Before configuring services, you must configure the NE clock source and specify the priority level to ensure that correct clock tracing relationships are created for all the NEs in the network.

Prerequisites

You must be an NM user with NE operator authority or higher.

Background Information

To implement clock protection, you must configure at least two traceable clock sources for the equipment. Usually, the tributary clock is not used as the clock source for the equipment. After you set the clock sources for all the NEs, query the networkwide clock tracing status again.

Procedure

Step 1 In the NE Explorer, select an NE and choose Configuration > Clock > Physical Layer Clock > Clock Source Priority from the Function Tree.

Step 2 Click Query to query the existing clock source.

Step 3 Click Create. In the Add Clock Source dialog box, select a new clock source and click OK.

Step 4 Optional: If an external clock source is selected, select External Clock Source Mode based on the type of external clock signals. In the case 2 Mbit/s clocks, specify Synchronous Status Byte to deliver SSM messages.

Step 5 Select a clock source, and click

 to adjust its priority level. The clock sources are arranged in descending order. The clock source on top is preferred for the NE.

NOTE

Internal clock sources have the lowest priority because of their low precision.

Step 6 Click Apply. In the Operation Result dialog box, click Close.

NOTE

If the clock tracing relationship changes because of change in the clock source, the Prompt dialog box is displayed, asking you whether to refresh the clock tracing relationship. Click OK. If you select Disable Prompting Next Time, no prompt is displayed even when the clock tracing relationship changes.

Step 7 Optional: If you select the line clock as the phase-locked source, you need to specify the priority table for the phase-locked sources. Click the Priority Table for Phase-Locked Sources of 1^st External Clock Output tab, and then click Create. In the dialog box that is displayed, select the phase-locked source, and click OK.

Step 8 Click Apply. In the dialog box that is displayed, click Close.

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