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The check-sync mechanism allows the initiation of a profile (configuration file) download from remote.

A SIP NOTIFY has to be used for sending the check-sync command. As additional information the protocol includes the switch, if a reboot has to take place (some operating systems need a reboot to make the new settings valid).

The following pictures show the principle of this.

Notify message without a reboot:

NOTIFY sip:1011.DE900IP@192.168.1.106:5060 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK64a54719;rport
From: "Gigaset" <sip:Gigaset@127.0.0.1>;tag=as1fe8c38c
To: <sip:1011.DE900IP@192.168.1.106:5060>
Contact: <sip:Gigaset@127.0.0.1>
Call-ID: 2d9bacf75c2022d744a929ed6d7f3913@127.0.0.1
CSeq: 102 NOTIFY
User-Agent: Gigaset PRO
Max-Forwards: 70
Event: check-sync;reboot=false
Content-Length: 0

Notify message with a reboot

NOTIFY sip:1011.DE900IP@172.29.1.51:5060 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK69448a0c;rport
From: "Gigaset" <sip:Gigaset@127.0.0.1>;tag=as39b0fcab
To: <sip:1011.DE900IP@172.29.1.51:5060>
Contact: <sip:Gigaset@127.0.0.1>
Call-ID: 5f7fe6183735ef2b607bd7da0aaf12d0@127.0.0.1
CSeq: 102 NOTIFY
User-Agent: Gigaset PRO
Max-Forwards: 70
Event: check-sync;reboot=true
Content-Length: 0