This is a device allowing a user to make VoIP calls using session initiation protocol (SIP). SIP is a telecommunication technology developed as a fast, easy standard for delivering IP-based data, voice, and video communications.
The system of distributing calls to agents more suitable by competence, mainly used in call service centers. The necessity for this service arose due to the big amount of incoming calls and in order to cope with them better, all calls are sorted and directed to corresponding agents.