In the Call History section of the portal, users are able to view a call's "Call Flow". 
Call Flow presents the call data in accessible terms (as supposed to complex data and information packets). Viewing Call Flow, allows more users are able to troubleshoot and fix the "why" of when a call does not work as expected.
While the Call Flow is usually pretty self explanatory in how it presents itself, the bellow chart shows some common SIP Messages and their Corresponding Call Flow Translation. This can be useful if anyone is wanting to dive deeper into what may be happening on a particular call.
| SIP MESSAGE | Call Flow Translation |
| "BYE": | '%s hung up' |
| "CANCEL": | '%s cancelled the call before it was answered' |
| 180 & 183: | '%s is ringing' |
| 403: | 'A device or server refused to process this request' |
| 404: | 'The dialed phone number, as dialed, couldn’t be found' |
| 406: |
%s device couldn’t generate an acceptable response' |
| 408: | 'A timely response wasn’t received and the request to %s timed out' |
| 480: |
'%s responded that they are temporarily unavailable' |
| 486: |
'%s was busy and declined the call' |
| 488: | '%s device doesn’t support the requested codec or feature' |
| 503: | '%s device responded that it was unable to process this call' |