Dlp-H140 Verify Timing In A Reduced Ring - Cisco ONS 15310-MA SDH Procedure Manual

Chapter 17 DLPs H100 to H199
Note
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Click Apply.
Step 5
Return to your originating procedure (NTP).
Step 6

DLP-H140 Verify Timing in a Reduced Ring

Purpose
Tools/Equipment
Prerequisite Procedures
Required/As Needed
Onsite/Remote
Security Level
In node view, click the Provisioning > Timing > General tabs.
Step 1
Step 2 Identify the type of timing (Line, External, Mixed) in the Timing Mode field.
Step 3 Scroll down to the Reference Lists and observe the NE Reference fields to see the timing references
provisioned for that node.
Step 4 If the removed node was the only BITS timing source, perform the following:
a.
b.
78-19416-01
The BITS Facilities section sets the parameters for your BITS1 timing references. Many of these
settings are determined by the timing source manufacturer. If equipment is timed through BITS
Out, you can set timing parameters to meet the requirements of the equipment.
In/Out State
Coding
Framing
Sync Messaging
AIS Threshold
Admin SSM
LBO
Use this task to verify timing in the ring where you removed a node.
None
NTP-H98 Remove a Path Protection Node, page 13-4
As needed
Onsite or remote
Provisioning or higher
Look for another node on the ring that can be used as a BITS source and set the Timing Mode for
that node to External. Choose that node as the primary timing source for all other nodes in the ring.
See the "DLP-H139 Change the Node Timing Source" task on page
If no node in the reduced ring can be used as a BITS source, choose one node to be your internal
timing source. Set the Timing Mode for that node to External, set the BITS 1 and 2 State field to
OOS, and set the NE Reference to Internal Clock. Then, choose line timing for all other nodes in
the ring. This forces the first node to be the primary timing source. See the
Node Timing Source" task on page
Internal timing conforms to Stratum 3 requirements and is not considered optimal.
Note
17-42.
Cisco ONS 15310-MA SDH Procedure Guide, Release 9.1 and Release 9.2
17-42.
"DLP-H139 Change the
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