[OpenSIPS-Users] UAC Registrant - keepalive messages?

[Thomas]

It doesn't have to be SIP OPTIONS. It can be anything as long as it's 
sent to the server from the same UDP socket. For example, the MicroSIP 
windows client sends 2 bytes 0x0D 0x0A every dozen of seconds.
This keeps a NAT state and allows subsequent SIP Register messages to be 
sent to the server from the same source port.

Since dispatcher is a different module than UAC Registrant, I assume it 
creates its own UDP connections meaning the packets will be sent to the 
server from a different source port and will be treated as a new 
session/binding.

I want to sent all subsequent SIP register messages from the same source 
port. Otherwise, the VoIP provider will terminate the ongoing phone call.


W dniu 15.04.2025 o 15:05, Pavel Eremin pisze:
> if i understood, you whant to send options to provider you registered to?
> May be this is some kind of workaround, but you can add providers into
> dispatcher module and check their statuses via OPTIONS.
> 
> пн, 14 апр. 2025 г. в 19:26, Thomas <tomasz.buty at o2.pl>:
>>
>> Hi everyone.
>> Is there any keepalive feature available to keep a NAT state for UAC
>> Registrant module which connects through UDP to VoIP provider?
>> Something like Asterisk's pjsip qualify_frequency that sends SIP OPTIONS
>> message every xx seconds.
>> It is useful if you use opensips as a proxy and it's behind NAT.
>>
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