SBC Counting Messages in a single call?

 

Hello everybody!

 

I'm looking at a situation in an scenario where there is an Aastra phone and a ssw, at some point of the call, the phone gets an UPDATE message, and answers a 200 OK, then gets another UPDATE message (identical, same SIP headers and SDP) and returns a 500 internal server error response. Is the SBC is able to stop the resending of this message?.

This may be a phone issue since further testing has been done involving other endpoints and they have obtained succesful results (no error responses after several UPDATE messages).

I'm not sure if the SBC is capable of rejecting the second UPDATE message since there is no substantial