Huawei BBU3900 Installation Manual page 50
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Also See for BBU3900:
- Hardware description (104 pages) ,
- Hardware maintenance manual (58 pages) ,
- Description (29 pages)
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Appendix
a
Setting the DIP Switches
Set the DIP switches of the BBU.
Settings of the DIP switches on the UELP
Settings of the DIP switches on the GTMU
All the DIP bits of S2 on the GTMU are set to OFF by default in all modes. When four 75-ohm E1/T1 links are faulty, all the
DIP bits of S2 should be set to ON so that the faults are rectified.
75-ohm E1 Mode
Other Modes
T1 Mode
75-ohm E1 Mode
120-ohm E1 Mode
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