[OpenSIPS-Users] TCP Sockets Phones De-Register and then Quickly Re-Register.
bogdan at voice-system.ro
Tue Dec 28 19:59:56 CET 2010
With TCP, there is no need to have the TCP connection up during the
whole duration of the registration - it is perfectly normal for the TCP
conn to be terminated after REGISTER request (by server or client side).
For example, opensips has a timeout - for how long it should keep an
unused TCP connection (see
If the UAC is behind NAT, it is a bit of different story, as the TCP
conn must stay open - the server cannot open later a TCP conn behind
NAT. For such cases see:
David J. wrote:
> I am noticing a strange behavior on the phones.
> They are connecting over TCP; It seems like every 3 minutes they
> quickly lose registration and then re-register.
> I am not sure if it is because the phone is sending a register every 3
> minutes and then opensips is closing the old socket and opening a new
> one or what?
> I dont have that much experience using TCP or how do troubleshoot this
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> Users at lists.opensips.org
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