No, 3CX does not support IP-Phone in STUN while hosted by 3CX.
Here are our recommendations to connect to 3CX:
- For the Home Office:
We strongly recommend using the 3CX APPs and/or Browser-Extensions which are simple, feature-rich, easy to use and are included free of charge in your subscription.
- I have a remote Office:
We still recommend the 3CX APPs and/or Browser-Extensions, however, to connect multiple IP-Phones from a single office space, use the 3CX SBC. The SBC overcomes network and firewall configuration/hurdles and also reduces the bandwidth requirement for calls. One SBC is required per office space.