Beijing in the letter test Technology Co., Ltd. was established in December 1995 in Beijing Zhongguancun Science Park, in August 2000 to complete the overall restructuring, August 7, 2003 in Shanghai Stock Exchange are listed. The registered capital of 136,632,000 yuan, is a professional dedicated to the development, production testing and maintenance of communications network management products for high-tech enterprises.

Company has been recognized as National Torch Plan Key High-tech enterprises, the State Torch Program Software Industrial Base backbone enterprises, the state planning key software enterprises, outstanding high-tech enterprises in Beijing, the Beijing technical center, the first batch of Beijing patent pilot enterprises, Zhongguancun Science Park in 2005, "five years on the stage" Haidian "star enterprise innovation", the main products the company was awarded the 2006 Beijing Beijing 2007 brand and product innovation.

With years of accumulated technology, the company has formed a communications network testing and monitoring instrumentation network management system into two categories 6 series of nearly 30 kinds of products, and all have independent intellectual property rights, exchange of product coverage, access and transmission, mobile communications, IP data communication, seventh letter, 3G and other countries focus on encouraging the development of communications industries, from basic physical layer and network layer of the test to high-level protocol analysis and network test and service monitoring and management, To ensure network security and efficient operation in various fields to provide comprehensive test solutions, the company has become the largest and most professional manufacturer of communications test.