Michael, 

> I'm running into a packet fragmentation problem on my OK response to an
> INVITE from an ITSP.
> It appears that the OK response is just over the limit and is getting
> split into two IP packets.   If they
Indeed, your 200OK message is 1511 bytes length. So, taking into account
that usual mtu is 1500 bytes, the message should be fragmented.

> arrive at the ITSP out of order (which they do about 50% of the time)
This should not be the case. IMHO, you should dig into the ip network to
solve "out of order fragmented packets" problem. 


> then the call fails.  And TCP
> is not an option.

Nikolay.
 


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