The system allows managing traditional voice and IP channels. It provides a full control of the communication process between the contact centre and the client as well as allowing processing incoming and outgoing calls made by the same agents.
Obviously SIP is considerably better than H.323 and complies with the understanding of IP-telephony as a global mass IP-service, and it should be implicitly considered right this way. And as SIP is able to serve not only telephony but also any communications at all in the real time over the IP-protocol; obviously it should become a base for other IP-services not yet existing but will appear in the future, as well.