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Expiration / SIP user

Expiration / SIP user

(OP)
To whom it may concern,

I would like to know which parameter or feature is in charge of managing SIP session expiration time ?

Here is my issue:
- I'm trying to set a mobility user application where endpoints will change their IP addresses constantly. I'm trying to register these users and actually they can be registered. The thing is, that users can be registered once; if I try to send additional register request (for example, I disconnected the endpoint in order to set new features) I did not receive 200 OK from PBX.

This is the first time I'm seeing this kind of behavior. I suspect it is something related with session expiration time, but I'm not sure.

Any advice would be appreciated.

Regards,

CCNA, SECURITY+

RE: Expiration / SIP user

(OP)
Just for the record,

We started to add the Expiration time on Contact Header. So far, it has been working well.

It seems that SIP REGISTER requires the expiration time defined on the Contact Header. Usually I see this as a global header.

CCNA, SECURITY+

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