WPPB F3, UELP, UTRP, WBBP D2, WBBP F4 HUAWEI UBBPd4, UBBP d4, UBBPe4, UBBP e4 HUAWEI UPEE, UPEA board, WBBPF4 UELP WD22UELP version A board UTRP WD22UTRP version B W-IP-O UTRP WD22UTRP version 2 W-ATM WBBP D2 QWL1WBBP d2 version WBBP F4 QWL1WBBP f4 version WPPB F3 QWL1WBBP f3 version HUAWEI BBU3900 WD22UPEU UPEE version B HUAWEI BBU3900 WD22UEIU UPEA version C UELP, UPEE, UPEA, UELP, WD22UELP, UTRP, WD22UTRP, IP, O UTRP, WD22UTRP,ATM, WBBP, QWL1WBBP, D2, WBBP, WPPB F3, F4, QWL1WBBP, f4, WD22UPEU, UPEE, WD22UEIU, UPEA, WBBP F4, version, C, HUAWEI, BBU3900 baseband boards, WPPB F3 HUAWEI BBU3900 BBU3910 Abbreviation Full Name 3GPP 3rdGeneration Partnership Project 3m Multi-carrier, Multi-mode, and MIMO AC Alternating Current APM Advanced Power Module BBU Baseband Unit BTS Base Transceiver Station CCU Cabinet Control Unit CMUA Central Monitoring Unit Type A CMUE Central Monitoring Unit Type E CPRI Common Public Radio Interface CRFUd CDMA Radio Frequency Unit Type D DBS Distribution Base Station DC Direct Current DCDU Direct Current Distribution Unit E-UTRAN Evolved Universal Terrestrial Radio Access Network EMC ElectroMagnetic Compatibility EMUA Environment Monitoring UnitType A eNodeB E-UTRAN NodeB EPS Embedded Power Supply System EPU Embedded Power subrack Unit ETP Embedded Telecommunication Power ETSI European Telecommunications Standards Institute FDD Frequency Division Duplex GSM Global System for Mobile Communications GUI Graphical UserInterface HAU Heater Assembly Unit HEX Heat EXchanger IBBS Integrated Backup Battery System ICR Indoor CentralizedRack IMB Indoor Mini Box LBBP LTE Baseband Processing Unit LMT Local Maintenance Terminal LRFU LTE Radio Frequency Unit LRFUe LTE Radio Frequency Unit Type E LTE Long Term Evolution MIMO Multi-Input and Multi-Output MME Mobility Management Entity MML ManMachine Language MRFU Multi-Mode Radio Frequency Unit MRFUd Multi-Mode Radio Frequency Unit Type D OMB Outdoor Mini Box PDU Power Distribution Unit PMU Power Monitoring Unit PSU Power Supply Unit RF Radio Frequency RFC Radio Frequency Cabinet RFU Radio Frequency Unit RH Relative Humidity RRU Remote Radio Unit S-GW Serving GateWay SLPU Signal Lightning Protection Unit SDR Software-Defined Radio TCO TotalCostofOwnership TEC Thermoelectric Cooling Unit TMC Transmission Cabinet UMTS Universal Mobile Telecommunications System USB Universal Serial Bus VLAN Virtual Local Area Network