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

[Victor Pascual Ávila]

Why don't you consider using VRRP?

Regards,
Victor Pascual

On Wed, Mar 12, 2008 at 6:03 AM, Venkatesh G <g_venkat7 at yahoo.co.in> wrote:
> 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
>  >
>  >
>  > Get the freedom to save as many mails as you wish.
>  > To know how, go to
>  >
>  http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html
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-- 
Victor Pascual Ávila
Research Engineer
Tel. +34 93 542 2906
Fax. +34 93 542 2517

Research Group on Network Technologies and Strategies (NeTS)
Universitat Pompeu Fabra (UPF)
Pg. de Circumval·lació, 8
Office 358
08003 Barcelona (Spain)
http://nets.upf.edu/