For this feature description, refer to the IceWarp WebClient Administration Guide – Administration Options – Dialling over Third Party SIP Server chapter.
See Also
VoIP Service
How a call gets through
Working behind a firewall or router
Communications via a SIP Gateway.
Reference
Using the Dial via SIP Functionality
Setting up a SIP Client - X-Lite
3CX PBX Integration
Settings for the Grandstream Hardware SIP Phone
DNS SRV Records Configuration
Access Mode – Policies
