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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 17 DLPs D1 to D99
DLP- D69 Set Up External or Line Timing
Step 2 In the Preferences dialog box, click the Firewall tab.
Step 3 In the CTC CORBA (IIOP) Listener Port area, choose a listener port option:
• Default - Variable—Use to connect to ONS 15454 SDH nodes from within a firewall or if no
firewall is used (default).
• Standard Constant—Use Port 683, the CORBA default port number.
• Other Constant—If Port 683 is not used, enter the IIOP port defined by your administrator.
Step 4 Click Apply. A warning appears telling you that the port change will apply during the next CTC login.
Step 5 Click OK.
Step 6 In the Preferences dialog box, click OK.
Step 7 To access the ONS 15454 SDH using the IIOP port, log out of CTC (click File > Exit and log back in).
Step 8 Return to your originating procedure (NTP).
DLP-D69 Set Up External or Line Timing
Note CTC refers to Timing A and Timing B as BITS-1 and BITS-2. The MIC-C/T/P FMEC connector is
labeled as Timing A and Timing B.
Step 1 In CTC node view, click the Provisioning > Timing > General tabs.
Step 2 In the General Timing area, complete the following information:
• Timing Mode—Choose External if the ONS 15454 SDH derives its timing from a MIC-C/T/P
FMEC; choose Line if timing is derived from an STM-N card (non-DWDM node) or OSC card
(DWDM node) that is optically connected to the timing node. A third option, Mixed, allows you to
set external and line timing references. (Because mixed timing can cause timing loops, Cisco does
not recommend its use. Use this mode with care.)
• Revertive—If this check box is selected, the ONS 15454 SDH reverts to a primary reference source
after the conditions that caused it to switch to a secondary timing reference are corrected.
• Reversion Time—If Revertive is checked, indicate the amount of time the ONS 15454 SDH will
wait before reverting to its primary timing source.
Purpose This task defines the SDH timing source (external or line) for the
ONS 15454 SDH.
Tools/Equipment None
Prerequisite Procedures DLP-D60 Log into CTC, page 17-49
Required/As Needed Required
Onsite/Remote Onsite or remote
Security Level Provisioning or higher
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