Session Initiation Protocol (SIP) is a protocol developed as a standard for initiating, modifying, and terminating an interactive user session that involves multimedia elements such as video, voice, instant messaging, online games, and virtual reality.
Swyx is fully SIP compliant, making it possible to use ITSP (Internet Telephony Service Providers) to make phone calls independent from the public telephone network. Additionally, third party SIP compliant hardware and software applications can be used with Swyx.
Using ITSP services for international calls can be a huge cost saving.
It gives you the option not to use BT lines for all your calls, and the system will work when BT phase out ISDN lines. This is planned to take place is 2009, and a “traditional” phone system would have to be replaced at this time. |