The external call transfer – is the call transfer to a telephone line other than the company’s telephone line. The internal call transfer – the transfer of an incoming call to another addressee registered on the same telephone line.
SmartNode 10200 media gateway allows adding VoIP capabilities to networks; it ensures the delivery of VoIP service by connecting voice traffic between the PSTN networks based on TDM (Timedivision Multiplexing) and IP networks such as the Internet.