SIP-based video call solutions are an interesting option in the video call space.SIP is the
protocol that is used in Enterprise VoIP solutions and is a way that SIP clients of all kinds
connect to a central server and connect to other SIP clients.Mostly this is for voice calls
and VoIP service providers like Vonage,Packet8,and enterprise VoIP solutions from Cisco,
Nortel,and Avaya to name a few.Software that can connect to a SIP system is called a soft-
phone and can call another softphone or a hardware VoIP SIP telephone or even make reg-
ular telephone calls to the PSTN ...
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