User's Manual Part 3

RBS 2308 and RBS 2309 User’s Guide
Local
If the yellow Local indicator is on and if it is not possible to bring the RRU into
remote mode, either by using the OMT or by pressing the RRU Local/Remote,
then perform the following actions step-by-step until the fault ceases:
•ResettheRRU
•ReplacetheRRU,seeSection 10.5.8 Replacing an RRU on page 235
If the yellow Local indicator is flashing and BSC communication (though
expected) is not established, check the Local indicator on the IXU.
If the Local indicator on the IXU is flashing, see Page 196.
If the IXU has established a BSC connection, perform the following actions
step-by-step until the fault ceases:
• Ensure that the BSC has deblocked the TRXCs for the RBS
• Ensure that the BSC has a correct configured A-bis path to the RBS [Digital
Connection Point (DCP)].
•ResettheRRU
• Ensure that the Y-link cable is undamaged and properly connected to the
correct ports, both on the RRU and the IXU
• Check that each transmission line is connected to the correct ports in both
the RRU and the IXU
Note: The IXU can establish a BSC connection even if the transmission
lines have been incorrectly connected to the ports. The order of
the ports in the IXU is: A C B D.
• Ensure that the RRU is defined in the installed IDB. To create a new IDB,
see Chapter Site Installation Tests in this manual.
•ResettheIXU
• Replace the Y-link cable, see Section 10.5.12 Replacing a Y-Link Cable
on page 250
•ReplacetheRRU,seeSection 10.5.8 Replacing an RRU on page 235
•ReplacetheIXU,seeSection 10.5.4 Replacing an IXU on page 219
RF Off
RRU is not transmitting on any of its radio ports. No TX in the RRU is enabled
in the BSC.
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EN
/LZT 720 0027 Uen R8A 2006-06-27