Figure 2-4
Slot assignment for the UPEU and UEIU
lists the ports on the UPEU and UEIU.
Table 2-3
Ports on the UPEU and UEIU
Slot
Board
Label
Connector Quantity
Description
Slot19
UPEU
EXT-ALM0
RJ-45
connector
1
Port for
Boolean
inputs 8 to 11
EXT-ALM1
RJ-45
connector
1
Port for
Boolean
inputs 12 to
15
MON0
RJ-45
connector
1
Port for
RS485 input
0
MON1
RJ-45
connector
1
Port for
RS485 input
1
Slot18
UEIU
(optional)
EXT-ALM0
RJ-45
connector
1
Port for
Boolean
inputs 0 to 3
EXT-ALM1
RJ-45
connector
1
Port for
Boolean
inputs 4 to 7
MON0
RJ-45
connector
1
Port for
RS485 input
0
MON1
RJ-45
connector
1
Port for
RS485 input
1
2.3 Monitoring Principles of the Cabinets
The DBS3900 cabinet is monitored by various boards. The boards collect alarms from sensors
and fans, and then transmit the alarm signals to the MON port on the BBU through the RS485
serial bus. In this manner, the boards monitor the cabinet.
BBU3900
Hardware Description
2 DBS3900 Monitoring System
Issue 11 (2010-11-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2-5
Summary of Contents for BBU3900
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