[asterisk-users] First SIP-registering succeeds, second doesn't

Andre Gronwald andregronwald78 at gmail.com
Mon Feb 13 10:40:37 CST 2017

Some further information:
asterisk version: 13.13.1, pjsip (pjproject) 2.5.5


Am 13.02.2017 um 17:32 schrieb Andre Gronwald:
> Hi all,
> I have a strange issue, with a some kind complicate architecture...
> A router of our internet provider is in front of another bintec rs353j 
> router, at which my freepbx installation is located. However, NAT etc. 
> seems to work fine.
> BUT: Something is not working...:
> When registering my sip-trunk towards my provider (3 different 
> providers, all behave comparable), everything works at first. Calls 
> are possible. But after some time, when the next REGISTER happens, the 
> answer of my provider is sent towards the wrong port. My freePBX 
> listens on 55060, where the first registration request are answered as 
> they should. in the second registration request wrong ports are used. 
> besides this, Header "Expires" is set to "0" and no "Allows" are 
> listed...
> [...]

> Any suggestions how to fix this? Or at least any idea what causes this?
> regards,
> andre

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