It is a call which is made over internet protocol (VoIP). For example,
one can call using Google Voice to other recipient located miles away. Such
call can also be international.
GoIP 16 is a sixteen channel VoIP-GSM gateway, designed to provide high quality communication between mobile networks of GSM 900/1800/1900/850 standards and the networks of IP-telephony. By supporting SIP-protocol, GoIP 16 is compatible with most IP PBX and supports SIP protocol from all popular manufacturers. This feature allows you to quickly and cost-effectively set telephone communication system in an office.