Hi All, 

I'm doing some experimenting with some different call routing scenarios and 
have run into an issue. 


Sipx 4.2.1 installed from ISO with a Polycom 300 and Grandstream GXP2020 phones 
connected for testing. 


Having been testing for a while and everything has been working very well. Had 
my ITSP connected via B2BUA with sipXbridge and incoming/outgoing calls were 
fine. 


I changed the SIP Trunk Gateway that was pointing to my ITSP and pointed it to 
a Freeswitch server that I am running - just to test some ideas. The Freeswitch 
server has a public IP and listens on port 5090. I have the "Address" and 
"Port" fields pointing to my Freeswitch IP and 5090 in the main Gateway 
configuration page and I have "<FS_IP_ADDRESS>:5090>" set under the "ITSP 
Account" settings of the Gateway. 


Sipx is registered to my Freeswitch server via sipXbridge. 


"Long Distance" Dial Plan is enabled and configured to use my Gateway. 


When I try to place a call from a phone - I get back a "500 Internal Server 
Error". A packet capture shows that the phone sends an Invite to sipX, sipX 
returns "100 Trying" and then returns "500 Server Internal Error, with 
sipfrag". The Message Body of the packet says "Sipfrag" and "Exception Info 
Unexpected error creating INVITE at Siputilities.java:839" 


I have googled this error, but not finding any info. 


Anyone have any ideas? 


Thanks, 


Dave Redmore 
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