Zulu clients were functioning as expected, until a recent update / upgrade of modules. Now Zulu clients do not receive incoming calls. Outgoing calls still function.
Asterisk CLI reports:
[2018-05-04 14:58:27] ERROR: res_pjsip.c:3858 endpt_send_request: Error 171060 ‘Unsupported transport (PJSIP_EUNSUPTRANSPORT)’ sending NOTIFY request to endpoint 90611
PBX Service Pack:188.8.131.52
Zulu : 184.108.40.206
Asterisk SIP : 220.127.116.11