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DS1 protection switching
Installation tests
4 - 1 4
365-372-304R7.1
Issue 1, November 2007
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DS1 protection switching
DS1 function unit protection switching test (manual)
While a VT cross connection exists, and a test set is connected, path switching will be
verified.
Use this procedure to test all of the Function Unit Slots occupied by a
LNW6/LNW7/LNW8 (DS1) circuit pack.
Important!
This test is performed when the DS1 circuit packs are in a 1x1 protection
arrangement. It is not mandatory to perform this test on each VT cross-connection,
however this procedure should be performed on each Function Unit Slot pair.
Procedure
Proceed as follows:
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1
Locate the Function Group equipped with the DS1 circuit pack.
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2
Determine the system is alarm free by clicking on the Alarm List button on the system
view.
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3
Unseat the active circuit pack. The active circuit pack has an ACTIVE LED lit. Monitor
the test set connected to the DSX patch panel.
Result:
The ACTIVE LED on the other circuit pack in the Function Group will light.
The MN alarm and the NE LED lamps on the SYSCTL will light.
Transmission at the test set will take a momentary hit and then re-establish.
Confirm that there is a CP Removed alarm by clicking on the Alarm List button on the
system view.
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4
Unseat the second circuit pack of the pair.
Result:
On the SYSCTL, the MN alarm extinguishes and the CR alarm lights. Test set
will be registering continuous bit errors and indicate AIS alarm.
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5
Reseat the first circuit pack that was removed.
Summary of Contents for Data Multiplexer Explore 1665
Page 8: ... Contents v i i i 365 372 304R7 1 Issue 1 November 2007 ...
Page 12: ... List of figures x i i 365 372 304R7 1 Issue 1 November 2007 ...
Page 16: ... List of tables x v i 365 372 304R7 1 Issue 1 November 2007 ...
Page 24: ... About this document x x i v 365 372 304R7 1 Issue 1 November 2007 ...
Page 272: ... Final operations Operational tests 5 2 2 365 372 304R7 1 Issue 1 November 2007 ...
Page 326: ... Cleaning pluggable optics modules Fiber cleaning B 1 4 365 372 304R7 1 Issue 1 November 2007 ...
Page 408: ...I N 4 365 372 304R7 1 Issue 1 November 2007 Index ...