Beijing Zhong Chuang Telecom Test Co., Ltd. (ZCTT) is a high-tech company dedicated in researching, developing and producing telecom network test and maintenance management products. Depending on many years of practices and accumulation of technology, the company has developed two major categories of products, including test instruments and Monitoring System of telecom networks, covering 5 series with nearly 30 kinds of products, whose proprietary intellectual property rights are all owned by ZCTT. Its products have covered switch, access and transmission, mobile communication, IP data communication, SS7, 3G and other key communication industries encouraged by the nation. The products have realized not only basic level test of Physical Layer and Network Layer, but also high level test of multi protocols, and also provide service analysis and network monitoring and management. ZCTT guarantees customers with all-around test solution in every field to ensure network security and efficient operation.