Nik,
Please pick IRC or Mailing list.. not both.  I answered your question on IRC... if you get that more than likely the ack isn't received and NAT is involved I'm guessing.

On Apr 22, 2009, at 11:16 AM, Nik Middleton wrote:

Can anyone tell me what would or cause the above hang-up cause?  I’m using latest svn and get loads of these above 10 Concurrent calls
 
Regards
 

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