IP Telephony SIP trunk
With IP telephony , you do not invest in PBX or telephone connections without the caller as usual fixed via the existing IT infrastructure.
The advantage with the Mobile Extension is that you call for free between mobile and landline phones in the company and get fixed telephony tariffs on mobile.
Functional - IP technology allows the solution to be flexible and consistent with a large functional richness. The system is scalable from small solutions for closely held companies to installations with thousands of users .