[SIPForum-discussion] Time interval between requests

[mustafa aydin]

Hi All,
 
Is there any time frame mentioned in RFCs which defines time interval between REQUESTS? For example, can UAC send CANCEL of a RE-INVITE just 0.0004 sec later ?  I tested some SIP servers , but none of them could handle the CANCEL properly when it comes just in such a short interval, but I  need to refer to RFCs in order to prove this wrong behaviour to vendor.
 
Thanks,
Mustafa AYDIN
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