[Serusers] make calls without registration

[Atle Samuelsen]

* Juha Heinanen <jh at tutpro.com> [050713 07:46]:
> Dave writes:
> 
>  > Is it possible to allow an UA to make calls
>  > without it registering itself? 
> 
> yes.
> 
>  > Can SER extract the contact info from the
>  > INVITE and then upon detecting that the "user is not
>  > registered" simply register the contact info?
> 
> you could write a module function to do that, but it would not be a good
> idea, because re-registration would require a new call before the
> contact expires.

Maybe Im wrong.. and Im not sure if this scenario is valid. 

In some cases, you have expires on a register for ~60 min.And keep
NAt'ed openings open with some form of nat-keepalive (notify, options
whatever).

The scenario is : 

user looses dsl link and gets a new ip when it coms up again, phone is registerd, and user can call out, but are
in this case not able call-in, it's 30 min until new register is issued. 

Or User looses dsl link, user is offline when registrations should be
sent.. after a few retries, Ua backsoff to not kill server when it coms
up again. User dials out.. this works, but now, since UA has backed off, It will not issue a new registration for X sec.

In these to cases, I think a function as described above would be cool,
but I dont know how it would be security-wise etc.

-Atle



> 
> -- juha
> 
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