Compact Structure and Quick Network Construction The BTS3900E has a highly integrated design, requiring less cable connections and facilitates installation and maintenance. In compliance with the IP65 protection degree, the BTS3900E features strong environment adaptability and has no need for an equipment room. The BTS3900E can share the Distributed Antenna System DAS on the existing network to maximize the investment protection for operators during network upgrade. Meanwhile, the compact and lightweight HUAWEI BTS3900E has a small number of spare parts, thus greatly reducing the cost of transportation and maintenance. The various installation options such as wallmounted, tower-mounted, support-mounted, and pole-mounted are possible with the BTS3900E. These options can well address the operators' requirements for quick and flexible site deployment, significantly accelerating network construction. Expanded Capacity and Enhanced Coverage The BTS3900E supports up to six carriers. The capacity of the BTS3900E can be expanded to 18 carriers through the addition of modules. In contrast to conventional indoor coverage solutions, the BTS3900E substantially expands the capacity of the coverage, enhances the traffic absorbing capability, and increases operators' revenues. Since it can be installed close to the antenna system, HUAWEI BTS3900E has a high transmission power at the Top of Cabinet. Combined with the flexibility in site deployment, the BTS3900E remarkably improves network coverage. Drawing on such prominent advantages in coverage and capacity, the BTS3900E can assist operators in enhancing network quality and user experience. Thanks to the advanced Multi-Carrier Power Amplifier MCPA technology, the BTS3900E can smoothly and quickly change from the coverage mode to the capacity mode, flexibly responding to network requirements at different phases. The rapid development in the field of mobile communications technology brings about sharp growth in the number of mobile phone users, which increasingly pose high requirements in the network quality of operators. In urban areas, network quality in places such as office buildings, business centers, and hotels has caught much attention. However, the size, weight, and noise of the BTS normally cause difficulty in acquiring a suitable site for operators during network deployment. Customer-oriented and innovative, Huawei unveils the industry-leading BTS3900E GSM hereafter referred to as BTS3900E.