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DS3 protection switching
Installation tests
4 - 2 8
365-372-304R7.1
Issue 1, November 2007
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DS3 protection switching
DS3 function unit protection switching test (manual)
Use this procedure to test all of the Function Unit Slots occupied with an
LNW16(DS3/EC1), LNW19/LNW19B(48DS3/EC1), LNW18 (TMUX) or LNW20
(48TMUX) circuit pack, whether they are cabled to a DSX or terminating equipment.
Important!
This test is performed when the DS3 circuit packs are in a 1x1 protection
arrangement.
It is not mandatory to perform this test on each sts cross-connection, however this
procedure should be performed on each Function Unit Slot pair.
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1
Locate the Function Group equipped with the DS3/TMUX circuit pack.
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2
Unseat the active circuit pack. The active circuit pack has an ACTIVE LED lit.
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.
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3
Unseat the second circuit pack of the pair.
Result:
On the SYSCTL, the MN alarm extinguishes and the CR alarm lights. The test
set is registering loss of transmission.
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4
Reseat the first circuit pack that was removed.
Result:
The ACTIVE LED on the reseated circuit pack will light. The FAULT LED on
the circuit pack will light for several seconds then extinguish. On the SYSCTL, the CR
alarm extinguishes and the MN alarm and the NE LED will be lit. Transmission is re-
established at the test set.
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5
Reseat the second circuit pack.
Содержание Data Multiplexer Explore 1665
Страница 8: ... Contents v i i i 365 372 304R7 1 Issue 1 November 2007 ...
Страница 12: ... List of figures x i i 365 372 304R7 1 Issue 1 November 2007 ...
Страница 16: ... List of tables x v i 365 372 304R7 1 Issue 1 November 2007 ...
Страница 24: ... About this document x x i v 365 372 304R7 1 Issue 1 November 2007 ...
Страница 168: ... 1665 Data Multiplexer 1665 DMX stand alone installation tests I I 2 365 372 304R7 1 Issue 1 November 2007 ...
Страница 250: ... Additional optical tests optional Installation tests 4 6 2 365 372 304R7 1 Issue 1 November 2007 ...
Страница 272: ... Final operations Operational tests 5 2 2 365 372 304R7 1 Issue 1 November 2007 ...
Страница 274: ... 1665 Data Multiplexer 1665 DMX ring setup and testing I I I 2 365 372 304R7 1 Issue 1 November 2007 ...
Страница 326: ... Cleaning pluggable optics modules Fiber cleaning B 1 4 365 372 304R7 1 Issue 1 November 2007 ...
Страница 408: ...I N 4 365 372 304R7 1 Issue 1 November 2007 Index ...