My calls cannot make calls using SIP. Today, calls stopped going completely. Although there was no change in SIP settings. In the Call Logs, it says: An error occurred in this call: call.in-progress.error-sip-telephony-provider-failed-to-connect-call. In some cases, I get the Customer Busy error.

To help track down this issue, could you share one or two: - The call ID - When exactly this happened (the timestamp) - What response you expected to get - What response you actually got instead This would really help us figure out what went wrong!