User's Manual Part 3

RBS 2109 User’s Guide
• Ensure that the BSC has a correct configured A-bis path to the RBS [Digital
Connection Point (DCP)].
• Reset the RRU
• 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 could be able to establish BSC connection even if the
transmission lines have been connected to the ports wrongly. 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.
• Reset the IXU
• Replace the Y link cable, see Section 9.5.10 Y Link Cable Replacement
on page 215
• Replace the RRU, see Section 9.5.7 RRU Replacement on page 208
• Replace the IXU, see Section 9.5.3 IXU Replacement on page 195
RF Off
RRU is not transmitting on any of its radio ports. No TX in the RRU is enabled
at the BSC.
AC Power On
If the AC power on indicator is OFF (green), and if AC Mains power should be
available, perform the following actions step-by-step until the fault ceases:
For more information about RBS AC mains voltage, see:
RBS 2308, RBS 2309, RBS 2109 and
EBB-06 Hardware Reference Manual
EN/LZT 720 0058
• Ensure that the RBS AC supply and RRU power switches on the MBU
are ON
• Open the MBU cover and use a multimeter to check that the power input is
either 100 V AC to 127 V AC, or 200 V AC to 250 V AC
183EN/LZT 720 0090 Uen R1A 2004-09-17