[Kamailio-Users] Retransmitted SUBSCRIBEs

[catalina oancea]

Hello,

If a phone re-sends a presence SUBSCRIBE requests even after 5 or 500
milliseconds, kamailio replied with '400 Bad request' to the second
SUBSCRIBE

The scenario is:

Phone                           Kamailio
   SUBSCRIBE    ---------->
         401    <----------
   SUBSCRIBE    ---------->
         202    <----------
       Pause    [      5ms]              (or 500 ms, the same thing
happens)
   SUBSCRIBE    ---------->         (previous SUBSCRIBE retransmitted)
400 Bad request <----------

Is this the expected behavior? Is there any way to get kamailio to
recognize the retransmission?
This causes problems with Snom phones because they receive 400 reply
when they retransmit the SUBSCRIBE, and presence stops working.

Thanks
Catalina