2021年2月19日 · bbu逻辑结构. bbu采用模块化设计，由基带子系统、整机子系统、传输子系统、互联子系统、主控子系统、监控子系统和时钟子系统组成 bbu5900槽位配置和单板. bbu5900上有11个槽位，各类型单板在bbu槽位中的分布如下图所示。 bbu3910槽位配置和单板

1. Connect the 3V3 connector or HDEPC connector at one end of the BBU power cable to the -48 V port on the UPEU module of the BBU, and tighten the screws on the connector to 0.25 N•m. 2. Connect the other end of the BBU power cable to the TP48200A cabinet. a) Connect the cord end terminal to the BLVD 16 A MCB port F6.

The BBU houses the UPEU and UEIU for monitoring. Each board has two Boolean input ports and two RS485 input ports, and each Boolean input port receives four Boolean inputs. Figure shows the slot assignment for the UPEU and UEIU.

2018年11月14日 · The Universal Power and Environment Interface Unit (UPEU) is a mandatory board of the BBU3900. It converts -48 V or +24 V DC power to +12 V DC power. The UPEU is classified into the Universal Power and Environment Interface Unit Type A (UPEUA) and the Universal Power and Environment Interface Unit Type B (UPEUB).

In all scenarios, a FAN, a UPEU, and a UEIU are configured in fixed slots in a BBU. The following table describes the principles for configuring a FAN, a UPEU, and a UEIU. A UPEU is a universal power and environment interface unit. UPEU boards perform the following functions: · A UPEUa/UPEUc/UPEUd converts -48 V DC input power into +12 V DC power.

2020年5月26日 · Provides S1 ports for communication between an E-UTRAN NodeB (eNodeB) and an MME/S-GW, and X2 ports for communication between eNodeBs. E-UTRAN is short for evolved universal terrestrial radio access network. Provides common public radio interface (CPRI) ports for communication with RRUs and processes uplink and downlink baseband signals.

· Processes signaling and manages resources for other boards in the BBU. · Provides a USB ports, transmission ports, and a maintenance port, which are used for signal transmission, automatic software upgrade, and LMT- or U2000-based BBU maintenance.

Contact the local Huawei office to handle the faulty board. 5.5 Replacing the UEIU The Universal Environment Interface Unit (UEIU) provides channels for transmitting the monitoring signals from the service board to the BBU.

UEIU This describes the Universal Environment Interface Unit (UEIU) board of the BBU3900. The UEIU transmits monitoring signals and alarm signals from external devices to the main control and transmission unit. Panel Figure 3-10 shows the panel of the UEIU. Issue 05 (2009-06-30)

1.3.5 UEIU The UEIU is a universal environment interface unit. A BBU5900 can be configured with a UEIUb. Functions A UEIU performs the following functions: Provides two ports, each transmitting one channel of RS485 signals.