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[8793]: res_pjsip.c:3858 endpt_send_request: Error 171060 ‘Unsupported transport (PJSIP_EUNSUPTRANSPORT)’ sending NOTIFY request to endpoint 90611
PBX Firmware:12.7.4-1804-2.sng7
PBX Service Pack:1.0.0.0
Zulu : 14.0.2.13
Asterisk SIP : 14.0.27.1