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.
Despite its sleek appearance and low price, Fanvil BW320 phone can confidently be attributed to the professional devices of IP-telephony. This phone works effectively with almost all popular IP providers and is compatible with the IP PBX and Soft Switch hardware, regardless of its manufacturer.