SIP Connection: Number Formats
With Telnyx, if you choose to build a WebRTC application, you can create a credential authentication based connection. Once created, you will be provided with, or can edit yourself, a username and password. You can then specify the DNIS number format as the SIP Username such that when inbound calls arrive to our network toward your DID's associated with the SIP Connection, we'll send the username of the SIP Connection in the SIP INVITE… This allows Telnyx to send the SIP INVITE to your WebRTC application with these codecs in the media parameters