Hi Mathieu, thanks for the reply. I enabled sip trace logging and got the logs below, but I am still at a loss at being able to identify the error or reproduce it consistently. The below log indicates to me that my FS server is initiating sending 2 BYE message to my DID provider (didforsale.com). Is there a way I can look further inside FreeSWITCH to see why it is sending this BYE packet?

sent 882 bytes to udp/[209.216.2.211]:5060 at 17:15:44.679208:

BYE sip:199.173.100.144:5060;transport=UDP SIP/2.0

Via: SIP/2.0/UDP 66.197.142.69:5080;rport;branch=z9hG4bKD0UKrDB508mDD

Route: <sip:209.216.2.211;ftag=dc7-13c4-2401b7-46dea593-2401b7;lr=on>

Route: <sip:65.217.40.210:5060;lr>

Route: <sip:63.110.102.238;lr>

Max-Forwards: 70

From: <sip:+1212381XXXX@63.110.102.238:5060;user=phone>;tag=Ztr5ycrv3QZ1g

To: <sip:+1909635XXXX@199.173.100.144:5060;user=phone>;tag=dc7-13c4-2401b7-46dea593-2401b7

Call-ID: a22bffb89064adc713c42401b78ca6b689e90b32fdbf612c0-0487-7441

CSeq: 118584736 BYE

Contact: <sip:+1212381XXXX@66.197.142.69:5080;transport=udp>

User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-14417M

Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO

Supported: timer, precondition, path, replaces

Reason: Q.850;cause=25;text="EXCHANGE_ROUTING_ERROR"

Content-Length: 0

sent 882 bytes to udp/[209.216.2.211]:5060 at 17:15:45.182589: