Cisco ONS 15454 SDH Specifications download pdf (Page 162)

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Cisco ONS 15454 SDH Installation and Operations Guide, R3.3

May 2002

Chapter 3 Node Setup

Setting Up ONS 15454 SDH Timing

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Timing Mode set to Mixed—Both BITS and optical cards are available, allowing you to set a

mixture of external BITS and optical trunk cards as timing references.

• BITS 1 Out/BITS 2 Out—Define the timing references for equipment connected to the Timing A or

B Out FMEC connector. Normally, Timing Out is used with Line nodes, so the options displayed are

the working optical cards. Timing A and Timing B Out are enabled as soon as BITS-1 and BITS-2

facilities are placed in service.

Step 5 Click Apply.

Note Refer to the Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide for timing-related

alarms.

Procedure: Set Up Internal Timing for the ONS 15454 SDH

Note CTC refers to Timing A and Timing B as BITS (Building Integrated Timing Supply) 1 and BITS 2.

The MIC-C/T/P FMEC connector is labeled as Timing A and Timing B.

Step 1 Log into the node that will serve as the timing source.

Step 2 From the CTC node view, click the Provisioning > Timing tabs (Figure 3-16).

Purpose If no BITS source is available, you can set up internal timing by timing all

nodes in the ring from the internal clock of one node. Internal timing is

Stratum 3 and not intended for permanent use. All ONS 15454 SDHs

should be timed to a Stratum 2 or better primary reference source.

Use this procedure to set internal timing for your ONS 15454 SDH nodes.

To set up external, line, or mixed timing, see the “Set up External, Line, or

Mixed Timing for the ONS 15454 SDH” procedure on page 3-19.

Prerequisite Procedures “Logging into CTC” section on page 2-22

“Add the Node Name, Contact, Location, Date, and Time” section on

page 3-2

“Set Up Network Information” section on page 3-4

Onsite/Remote Onsite or remote

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