Needs a way to represent VoIP SIP account online connectivity status
One of the crucial aspect of being able to use SIP accounts is being sure that each account is actually online and reachable for incoming calls. Every softphone out there (and even hardware deskphones) indicates connectivity status, usually with a green (connected/reachable) vs yellow (connecting) vs red (offline/error) and possibly gray (inactive/disabled) status "lights". And if an account has trouble connecting or goes offline due to a network outage, the app would need to make it very obvious and noticeable so that the user knows they are unreachable and can attempt to address the problem.
The only tricky part, I suspect, is figuring out where in the UI those status indicators should go.
Also, ideally (this is a bit geeky), the SIP accounts should have a ping latency indicator that gets updated periodically, ex: "Latency: 11ms (good)" vs "Latency: 45ms (fair)" vs "Latency: 140ms (bad)" (or using a range of colors again on the text)