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.
BD white@$0.0355 BD Gray@$0.0191 BD E1@$0.0270 India@$0.0102 Nepal@$ 0.080 Pakistan@$0.0280
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