You would have to ask whatever is sending you the BYE. Sometimes misconfigured things can hang up when on hold due to media timeout, sometimes other issues. From this information its impossible to know.
On Jan 20, 2017, at 12:42 PM, Paul Zillmann <mail@paulzillmann.de> wrote:
Hello Folks,
a user hooked me on, that whenever he calls certain numbers, and was put into hold (call is transfered), that legB sends a BYE after all. Is this a misconfigure on the user's side - or is legB misconfigured?
The siptrace attatched seems to be okay - but what I don't understand is, why is the second reinvite marked as recvonly. I guess the second reinvited comes from legB because of the transfer was accepted - but why reconly - and why does legB sends a BYE after that one?
Thanks a lot