Switching category: telephone switching equipment, routers, Ethernet switches, HLR Transmission category: SDH, WDM, MSTP, PTN, OTN, ASON digital microwave communication equipment, satellite earth station transmission equipment Power supply category: high-frequency switching power supply, UPS, battery, lithium battery, high-voltage DC 240V/336V power supply system, AC/DC distribution cabinet Mobile base station category: base station equipment, repeater equipment, base station controller access equipment: ADSL/ADSL2+, VSAT, EPON Server and gateway devices: servers, gateways, BNAS, SIP, integrated access media gateway devices, signaling gateway devices Communication equipment and facilities: We provide various power equipment such as container data centers, ICT machine rooms, electrical and electronic equipment, nuclear equipment, and other products, including environmental and mechanical reliability and seismic testing, as well as radiation interference testing, radiation anti-interference testing, and wireless products such as RFID/SRD/2G/3G/4G/4G radiation interference testing, radiation stray testing, radiation power testing, and radiation anti-interference testing services