Lost call issue

[Mohamedseliem]

kindly check please, most of lost calls shows those errors

12/21/2022 12:48:40 PM - [CM503003]: Call(C:9790): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5483
12/21/2022 12:48:40 PM - [CM503003]: Call(C:9790): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5063
12/21/2022 12:48:40 PM - [CM503003]: Call(C:9790): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5063
12/21/2022 12:47:18 PM - [CM503003]: Call(C:9785): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5063
12/21/2022 12:47:17 PM - [CM503003]: Call(C:9787): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5483
12/21/2022 12:47:17 PM - [CM503003]: Call(C:9787): Call to <sip:[email protected]:0> has failed; Cause: 487 Request Terminated/INVITE from 127.0.0.1:5063

does bold sentence mean computers Network cards (Lan issue) ?

 

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What is the problem you're having?

https://www.3cx.com/pbx/sip-responses/

487 Request Terminated - Request has terminated by bye or cancel.