Functions
The UEIU performs the following functions:
l Provides two ports, each transmitting one RS485 signal.
l Provides two ports, each transmitting four boolean signals.
l Transmits monitoring signals and alarm signals from external devices to the main control
and transmission unit.
Ports
The UEIU is configured in slot 18. It provides four ports with two ports transmitting two RS485
input signals and the other two ports transmitting eight Boolean signals.
Table 3-15 describes the ports on the panel of the UEIU.
Table 3-15 Ports on the panel of the UEIU
Slot Label Connect
or
Quanti
ty
Description
slot 18 EXT-
ALM0
RJ-45 1 No.0 to 3 Boolean signal input ports
EXT-
ALM1
RJ-45 1 No.4 to 7 Boolean signal input ports
MON0 RJ-45 1 No.0 RS485 signal input port
MON1 RJ-45 1 No.1 RS485 signal input port
3.2.7 UTRP
The Universal Transmission Processing unit (UTRP) is the transmission extension board of the
BBU3900. It provides eight E1s/T1s, one unchannelized STM-1/OC-3 port, and four electrical
ports or two optical ports.
Specification
Table 3-16 describes the specifications of the UTRP.
Table 3-16 Specifications of the UTRP
Board
Sub-board/Board Type Port
UTRP2 UEOC Two universal FE/GE optical
ports
UTRP3 UAEC Ports for eight channels of
ATM over E1/T1
UTRP4 UIEC Ports for eight channels of IP
over E1/T1
BBU3900
Hardware Description 3 BBU3900 Equipment
Issue 11 (2010-11-10) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
3-17
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