Perform An Xc Loopback On The Source Optical Port; Figure 1-8 Xc Loopback On A Source Stm-N Port - Cisco ONS 15600 SDH Troubleshooting Manual

Chapter 1 General Troubleshooting
b.
c.
d.
Clear the terminal loopback circuit before testing the next segment of the network circuit path:
Step 9
a.
b.
c.
d.
Complete the
Step 10

1.2.3 Perform an XC Loopback on the Source Optical Port

This procedure is performed from an STM-N card or ASAP card optical port to test the cross-connect
Note
circuit connection.
You can perform an XC loopback on either the circuit source working or the protect port of a 1+1
Note
protection group.
XC loopbacks do not require on-site personnel.
Note
The XC loopback test is available for STM-16, STM-64, and ASAP cards and occurs on an optical circuit
transiting the SSXC card in a network circuit. Completing a successful XC loopback from an optical port
through the SSXC card eliminates the SSXC card as the source of trouble for a faulty circuit.
shows an example of an XC loopback path on a source STM-N port.
Figure 1-8
Test Set
Complete the
July 2010
Choose the appropriate state (Unlocked; Locked,disabled; Locked,maintenance;
Unlocked,automaticInservice) from the Admin State column for the port being tested. If multiple
ports are available, select the appropriate row for the desired port. (The new administrative state will
override the loopback.)
Click Apply.
Click Yes in the confirmation dialog box.
Click the Circuits tab.
Choose the loopback circuit being tested.
Click Delete.
Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
"1.2.3 Perform an XC Loopback on the Source Optical Port" procedure on page
XC Loopback on a Source
STM-Nx XC
"Create the XC Loopback on the Source-Node Optical Port" procedure on page
1.2.3 Perform an XC Loopback on the Source Optical Port
STM
-N Port
STM-Ny
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
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Figure 1-8
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