Perhaps implement Registration Timeouts.
 
If the aim is to stop the user from connecting using that IP address, then you could, on OpenSER, do something along the lines of:
 

   if(src_ip==192.168.0.55)
   {
      sl_send_reply("404", "User not found..");

   };

 


 
On 9/28/06, Bogdan-Andrei Iancu <bogdan@voice-system.ro> wrote:
Hi Javier,

that must be done by the phone.

regards,
bogdan

Javier wrote:

> can I unregister the the firsth register ?
>
>
>     ----- Original Message -----
>     *From:* Daniel-Constantin Mierla <mailto:daniel@voice-system.ro>
>     *To:* Javier Ramirez <mailto: jvr_78@yahoo.com.ar>
>     *Cc:* users <mailto:users@openser.org>
>     *Sent:* Saturday, September 23, 2006 5:36 PM
>     *Subject:* Re: [Users] UN-REGISTER
>
>     If the user closes the sip client on 0.55, then the client should
>     automatically un-register. If not, then the user will have two
>     contacts
>     and both phones will ring.
>
>     If you want to limit the number of registered contacts, you can do it
>     via max_contacts parameter of registrar module:
>
>     http://www.openser.org/docs/modules/1.1.x/registrar.html#AEN233
>
>     Cheers,
>     Daniel
>
>
>     On 09/22/06 23:47, Javier Ramirez wrote:
>     > Hi, I have a question:
>     >
>     > the user A is register, the ip of register is 192.168.0.55.
>     > the user change PC, and this PC have the ip 192.168.0.66
>     >
>     > the user register again, in the new machine, but, how to unregister
>     > the firsth registration from 192.168.0.55 ?
>     >
>     > best regards
>     > Javier
>     >
>     >
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