4-9
Cisco ONS 15454 Procedure Guide, R5.0
December 2004
Chapter 4 Turn Up Node
NTP-A28 Set Up Timing
Figure 4-2 CTC Computer and ONS 15454s Residing Behind Firewalls
Stop. You have completed this procedure.
NTP-A28 Set Up Timing
Step 1 Complete the “DLP-A60 Log into CTC” task on page 17-66 at the node where you will set up timing. If
you are already logged in, continue with Step 2.
Step 2 Complete the “DLP-A69 Set Up External or Line Timing” task on page 17-75 if an external building
integrated timing supply (BITS) source is available. This is the common SONET timing setup procedure.
Step 3 If you cannot complete Step 2 (an external BITS source is not available), complete the “DLP-A70 Set
Up Internal Timing” task on page 17-77. This task can only provide Stratum 3 timing.
Note For information about SONET timing, refer to the “Security and Timing” chapter in the Cisco
ONS 15454 Reference Manual or Telcordia GR-253-CORE.
Stop. You have completed this procedure.
55350
CTC computer
Firewall
Port
filtering
Protected network External network Protected network
ONS 15454
Private
network
Unprotected
network
Private
network
IIOP port
IIOP port
IIOP port
Firewall
Port
filtering
ONS 15454
Purpose This procedure provisions the ONS 15454 timing.
Tools/Equipment None
Prerequisite Procedures NTP-A24 Verify Card Installation, page 4-2
Required/As Needed Required
Onsite/Remote Onsite or remote
Security Level Provisioning or higher
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