[SIPForum-discussion] Any method to Cancel the REGISTERATION ?

[Venkatesh G]

Hi Ravi,

       Thanks for your response. But my problem is,
SIP phone need a message before expiry of timer. Let
me explain you in detail.

1.SIP Phone has primary server and Backup server.

2.When the IP link is down between SIP phone and
Primary server, SIP phone sends REGISTER request to
backup server and Backup server responds with 200 ok.
Registration done at this time.

3. BEFORE EXPIRY TIMER IS OVER, if the IP link between
SIP phone and Primary server came up, SIP phone has to
de-register to Secondary server and should register to
Primary server.

4. At this time, Secondary server has to send some
message to SIP phone to start REGISTRATION TO Primary
server. I want to know that is there any message
available.

5. If no message is possible, after expiry time is
over, SIP automatically triggers the registration to
Primary server. But, in this case, the problem is I
need to wait until EXPIRY time is over. I want to
avoid this waiting.

If any idea will be helpful for me.

Thanks & Regards
Venkat



--- Ravi Siebel <ravi_siebel at yahoo.com> wrote:

> Hi ,
>    
>   The back-up Sip server as you mentioned below can
> send the 200 Ok response once the expire timer get
> expired and parallely it should the delete the
> binding from Location Server.
>    
>   Once the SIP Phone received the 200 OK response
> for de-registration, it can intiate the REGISTER
> request towards the Primary Server.
>    
>   Regards,
>   Ravi
> 
> Venkatesh G <g_venkat7 at yahoo.co.in> wrote:
>   Hi all,
> 
> I need some information regarding SIP REGISTRATION.
> 
> If you take Thomsom SIP phone, in its configuration,
> it has Primary SIP server and Backup SIP Server.
> Suppose it is REGISTERed to Backup SIP server, if
> this
> Backup SIP server wants to cancel this REGISTRATION,
> is there any message that can be sent by Backup SIP
> server to the SIP Phone so that SIP phone will
> register to Primary SIP server ?
> 
> Thanks & Regards
> Venkat
> 
> 
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