What is fine
- Installing an IP PBX on your premises or hosting one — the system itself is business equipment.
- Extensions over your own network, including staff working remotely through the company system.
- SIP trunks or lines from a licensed UAE operator, which is how compliant business telephony is delivered here.
- Internal calling between your own sites over your own network or site-to-site VPN.
- Teams, Zoom and Webex for meetings, and licensed operator-provided calling plans where they apply.