Sofa 1.13.3 does not include the contact header
Which can lead to calls not being successfully placed:
(sm.puri.Calls:4839): CallsSipOrigin-DEBUG: 19:18:09.879: The call state has changed: 000 INVITE sent
(sm.puri.Calls:4839): CallsSipOrigin-DEBUG: 19:18:09.880: response to outgoing INVITE: 400 Missing Contact header
(sm.puri.Calls:4839): CallsSipOrigin-DEBUG: 19:18:09.880: The call state has changed: 400 Missing Contact header
(sm.puri.Calls:4839): CallsSipOrigin-DEBUG: 19:18:09.881: Call terminated. Deactivating media pipeline
See https://github.com/freeswitch/sofia-sip/issues/25 and https://github.com/freeswitch/sofia-sip/issues/52