[OpenSIPS-Users] Registration process

[Toyima Dias]

Hello,
I'm a little confuse about the process of registration, who does set the
expiration time on a REGISTER request? is it done by the Proxy? or may be
the client? i've read on the RFC 3261 the following:

"Version 1.0 StartHTML:0000000105 EndHTML:0000000682
StartFragment:0000000424 EndFragment:0000000646

If neither mechanism for expressing a suggested expiration time is
present in a REGISTER, the client is indicating its desire for the
server to choose.!

That means that the UA can send or not the expires in the contact? what
about if the expiration date finish?what should be done? the REGISTER server
sends some message to refresh the binding?

Thanks in advance!!!
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