Hi, I have seen this state happen when the incoming UA does not respond to the authentication challenge. These are usually bots trying to find open installations and who don't bother to answer when they receive a 407 (i.e. they "abandon" the sip transaction). Best Regards, -- Vallimamod Abdullah SIP Solutions vma@sip.solutions linkedin.com/in/vallimamod .

On 9 Oct 2019, at 08:14, S.Mohammad Emami Razavi <emamirazavi@gmail.com> wrote:

Hello everybody, Have you ever got `Abandoned` warning and your call hanged?! Sometimes casually our internal calls have this problem. Call is not bridged (like the device hangs!) and `Abandoned` warning logged.

fs_cli console log tells:

``` 2019-10-09 09:01:47.502759 [WARNING] switch_core_state_machine.c:572 8a09055e-98b6-409a-9d01-8b1961860447 sofia/internal/138@***.***.***.***:5060 Abandoned ```

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