Cisco ONS 15454 SDH Specifications download pdf (Page 156)

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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

Figure 3-12 Deleting a user from the node view

3.5 Setting Up ONS 15454 SDH Timing

SDH timing parameters must be set for each ONS 15454 SDH.

3.5.1 Timing Sources and Modes

Each ONS 15454 SDH independently accepts its timing reference from one of three sources:

• The Timing A and Timing B connector on the MIC-C/T/P FMEC in Slot 24.

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

• An STM-N card installed in the ONS 15454 SDH. The STM-N card is connected to a node that

receives timing through a BITS source.

• The internal ST3 clock on the TCC-I card.

You can set ONS 15454 SDH timing to one of three modes: external, line, or mixed. If timing is coming

from the MIC-C/T/P FMEC timing connector, set ONS 15454 SDH timing to external. If the timing

comes from an STM-N card, set the timing to line.

Note The line timing mode is not available for 64 KHz.

Delete user

dialog box

Provisioning tab Node viewSecurity tab

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Cisco ONS 15454 SDH Specifications Page 156

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