It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
Our company is involved in many different areas of business. We have 3 main divisions and 9 subdivisions. We are located in various major cities around the world through main offices and partner offices. Our main offices are in Shanghai, China. We hav
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