Subject: Grandstream UCM System Event
From: GX-PBX-REPORT <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>
Date: Fri Sep 1 20:19:57 2017

[Device Mac addr: 00:0B:82:75:F5:B7]

SIP trunk register failed! provider name is: test, host is: 192.168.10.250, username is: test