Subject: Grandstream UCM System Event
From: GX-PBX-REPORT <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>
Date: Sat Aug 26 12:41:22 2017

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

SIP lost registration event! extension: PJSIP/227,username: PJSIP/227