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4 BTS3900 Components
LED
Fault LED
4.11.3 Power Subrack (DC/DC)
The power subrack (DC/DC) provides the power input wiring terminals, power output wiring
terminals, ALM port, and PRESENT port. The terminals and ports are used for the connections
of the +24 V input power cables, -48 V output power cables, monitoring signal cable for the
PSU, and in-position signal cable for the PSU respectively.
Exterior
Figure 4-49
Figure 4-49 Power Subrack (DC/DC)
(1) Power input wiring
terminals
Ports
Table 4-63
4-68
Color
Red
shows the power subrack (DC/DC).
(2) PRESENT port
describes the ports and terminals on the power subrack (DC/DC).
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Status
On
Off
Blinking
(3) ALM port
(4) Power output wiring
terminals
BTS3900
Hardware Description
Description
There is abnormal
input or output
voltage, the unit is
overheated, or the
unit is not properly
inserted.
The running status is
normal.
The fan is faulty.
Issue 04 (2011-02-15)
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