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P
OWERING
face with a BS330 base station and BS340 base station connected. The
values in the power requirement tables are worst case figures.
When the express power feeding pair, EPP is used, the power loss will
decrease less and the line length will increase. It is possible to get 2 EPP
if the EPP pair from the ELU31 board is copied into two pairs in the MDF,
see figure 24 Connections when using 2 EPP pairs on page 47 and also
chapter 7.1 Introduction on page 49.
For backplanes with two -48 V pins (LBP22 and later), up to eight BS3x0
or BS3x2 base stations can be connected, to the ELU31, depending on
power consumption see chapter “Appendix A:RFP Power Consumption”
in “Installation Guide Base Station”.
Figure 24:Connections when using 2 EPP pairs
Maximum power available from one ELU31 board in an LBP22 maga-
zine or later with two -48 V pins in the backplane is 109 W (42 x 1.3 x 2).
Using the backplane type, available power and the values in tables, see
chapter “Appendix A:RFP Power Consumption” in “Installation Guide
Base Station”, the number of base stations that can be connected to one
ELU31 board can be determined. The power used by each ELU31 board
and its base stations can then be added up to confirm that this is possible
with the available power.
Practical limitation when using MX-ONE Classic with MGU, the practical
and power limitation is 10 ELU31 boards.
When using MX-ONE Media Gateway Classic with LSU-E, the practical
and power limit is 5 ELU31 boards per (DSU-controlled) subracks, or 15
ELU31 boards in a 4 subracks gateway. In a 3U box BFD 761 42/x the
number of ELU31 boards is limited to 1 due to power consumption.
