18-24
Cisco ONS 15454 Procedure Guide, R5.0
March 2007
Chapter 18 DLPs A100 to A199
DLP-A157 Change the Node Timing Source
DLP-A157 Change the Node Timing Source
Caution The following procedure might be service affecting and should be performed during a scheduled
maintenance window.
Step 1 In node view, click the Provisioning > Timing tabs.
Step 2 In the General Timing section, change any of the following information:
• Timing Mode
Note Because mixed timing can cause timing loops, Cisco does not recommend using the
Mixed Timing option. Use this mode with care.
• SSM Message Set
• Quality of RES
• Revertive
• Revertive Time
See the “DLP-A69 Set Up External or Line Timing” task on page 17-75 for field descriptions.
Step 3 In the BITS Facilities section, you can change the following information:
Note The BITS Facilities section sets the parameters for your building integrated timing supply
(BITS1 and BITS2) 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.
• BITS In State
• BITS Out State
• State
• Coding
• Framing
• Sync Messaging
• AIS Threshold
• LBO
Purpose This task changes the SONET timing source for the ONS 15454.
Tools/Equipment None
Prerequisite Procedures DLP-A60 Log into CTC, page 17-66
Required/As Needed As needed
Onsite/Remote Onsite or remote
Security Level Provisioning or higher
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