The Critical Communications World CCW 2019 held in Kuala Lumpur on 17 June, Malaysia is one of the key events of the year for the critical communications community. It brings together the world's top professional users, operators, solution & service vendors, technology developers and manufacturers. Experts attended the event and presented the latest products and cluster solutions on the spot and exchanged advanced ideas on the future development of Emergency Communication Technology at the seminar.Helios, as one of the leading solution providers and manufacturers for Digital Public Safety, Critical Communication and Cellular Networks. At this show, Helios presented TETRA / DMR / LTE Optical DAS, DMR-450 Band Selective Repeater；Tetra Digital Channelized Repeater and FiberOnAir® 600 Wireless Backhaul. The highlight of products is undoubtedly HELIOS Sub-6GHz Wireless Solution -FiberOnAir® 600 Wireless Backhaul Powered by advance software-Defined Radio technique and architecture which support 1.4MHz/3MHz/5MHz/10MHz/15MHz/20MHz/40MHz flexible & variable channel bandwidth to meet the needs of different scenarios and based on OFDM & Carrier Aggregation & MIMO with 1ms TTI design enabling to reduce the transmission delay effectively. We believe that HELIOS FiberOnAir® 600 Wireless Backhaul Solution will be the future market leader in unlicensed & licensed PtP/PtMP, ideal for rural and urban access voice, HD video and data capable.