3cx errors regarding SIP trunk

[itops-care-bears]

hi experts, we recently enabled email notifications in 3cx and started receiving alerts as below.
1. Trunk L:10001(Vocus Communications xxxx) has changed status to unregistered. This means that no more calls will pass via this trunk. Please check your network connection and the voip provider or other SIP PBX
2. Call or Registration to 04xxx@(Ln.10001@Vocus Communications xxxx) failed. 202.147.x.x replied: 486 Busy here; from IP:202.147.x.x:5060

we dont really use the phones a lot so we didnt really make test calls when the alerts come in, plus we sometimes only find the emails afterwards.

I didnt some good search to understand the issue but not sure if I need to change anything. any guidance/help will be appreciated.

 

[leejor]

How often does the fist log occur. I have seen trunks go unregistered, for a minute or two, on occasion,in the middle of the night. If it is happening quite often, then you might get your provider involved.
The second log would seem to indicate that the called party was engaged. The caller should have received a busy signal, or some other audio indication, confirming that.