Making calls via SIP registration
VoxImplant supports forwarding calls to 3rd party SIP server using VoxEngine's callSIP method which is rather complicated and requires knowledge of SIP protocol. VoxImplant supports SIP Registrations - it registers on 3rd party SIP server as a customer and can make/receive calls using the customer account, now it's possible to make outbound calls using SIP registrations in the following way:
const call = VoxEngine.callSIP("some_number", {regId: SIP_REGISTRATION_ID});
SIP_REGISTRATION_ID can be found in the SIP Registrations tab of each particular Application or using HTTP API
Inbound calls that come from SIP Registration arrive to VoxEngine scenario as any other call resulting in CallEvents.Alerting event dispatch.