Board
Optional/
Mandatory
Maximum
Quantity
Slot
Remarks
USCU
Optional
1
Slot 0 or slot 1
Preferentially
configured in
slot 1
Configured in
slot 1 in the case
of 1 U dual-
satellite-card (in
this case, slot 0
is also occupied)
shows the typical configurations of the BBU3900 in UL mode.
Figure 3-10
Typical configuration of the BBU3900 in UL mode
3.2 Combinations of Cabinets
The BTS3900 cabinets can be stacked or installed side by side. The side-by-side installation
mode is recommended. If the space in the equipment room is insufficient, the stack mode can
be used.
Side-by-Side Installation Mode
The principles for installing two cabinets side by side are as follows:
l
By default, the primary cabinet is positioned on the left, and the secondary cabinet is
positioned on the right. If restricted by the actual situation in the equipment room, the
primary cabinet can be positioned on the right.
l
The BTS3900 (-48 V DC) cabinet, BTS3900 (+24 V DC) cabinet, and BTS3900 (AC)
cabinet support side-by-side installation mode.
NOTE
l
The primary cabinet is the cabinet that is configured with the BBU.
l
The secondary cabinet is the cabinet that is not configured with the BBU.
,
, and
show the side-by-side installation mode with two
cabinets.
3 BTS3900 Hardware Configuration
BTS3900
Hardware Description
3-14
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Copyright © Huawei Technologies Co., Ltd.
Issue 04 (2011-02-15)