20-75
Cisco ONS 15454 SDH Procedure Guide, R7.0
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Chapter 20 DLPs D300 to D399
DLP- D368 Manual or Force Switch the Node Timing Reference
• Click Default to return to the path trace default settings. (Path Trace Mode is set to Off and the
New Transmit and New Expected Strings are null.)
Caution Clicking Default generates alarms if the port on the other end is provisioned with a different string.
The Expect and Receive strings are updated every few seconds whether the Path Trace Mode field is set
to Auto or Manual.
Step 11 Click Close.
When you display the detailed circuit window, path trace is indicated by an M (manual path trace) or an
A (automatic path trace) at the circuit source and destination ports.
Step 12 Return to your originating procedure (NTP).
DLP-D368 Manual or Force Switch the Node Timing Reference
Step 1 In node view, click the Maintenance > Timing > Source tabs.
Step 2 From the Reference drop-down list for the desired Clock, choose the desired reference.
Step 3 From the Operation drop-down list for the desired Clock, choose one of the following options:
• Manual—This operation commands the node to switch to the reference you have selected if the
SSM quality of the reference is not lower than the current timing reference.
• Force—This operation commands the node to switch to the reference you have selected, regardless
of the SSM quality (if the reference is valid).
For information about the Clear option, see the “DLP-D369 Clear a Manual or Force Switched Node
Timing Reference” task on page 20-76.
Step 4 Click Apply next to the timing source.
Step 5 Click Ye s in the confirmation dialog box. If the selected timing reference is an acceptable valid
reference, the node switches to the selected timing reference.
Step 6 If the selected timing reference is invalid, a warning dialog appears. Click OK; the node does not revert
to the normal timing reference.
Step 7 Return to your originating procedure (NTP).
Purpose This task commands the NE to switch to the timing reference you have
selected, as long as the new reference is valid. With a Manual switch, the
synchronization status message (SSM) quality of the reference must not
be lower than the current timing reference.
Tools/Equipment None
Prerequisite Procedures DLP-D60 Log into CTC, page 17-49
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Maintenance or higher
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