Destination is rejecting my call with Busy 486

After I’ve made an update to all my modules i have started to get call rejected with busy tones, I have asked my SIP Vendor and they said that this rejection is comming from destination, they have instructed me to try again and the same thing happens.

The vendor takes too much time to answer any support ticket so I am stuck and I can’t place an outgoing call.

Any suggestion about what can be casing the issue?, before I’ve made the update, everything was working OK.

HEre you can see the log thanks.

If you have called the right number, this means what it says; the called party is busy. 486 is supposed to be used when the actual destination phone is in use, not when there is network congestion.

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