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The mechanism is offering an easy way for loading the URL of the provisi= oning server, on which the configuration files (Profiles) and / or the firm= ware files of the different Gigaset IP-phones are located.
Mainly the mechanism is designed for VoIP PBX=E2=80=99s offering an own = provisioning server for the connected VoIP phones.
Before an answer is send to the initiator of the SIP-Multicast, the PBX = (or SoftSwitch) has to identify the phone. This is done via the SIP-User-Ag= ent header, which is containing at first the product name.
The example flow chart shows the principle of this mechanism:
(wireshark filter"sip.Method =3D=3D "SUBSCRIBE"")
Device sends Subscribe during boot:
Request-Line: SUBSCRIBE sip:MAC%3A7C2F8030D21E@local SIP/2.0=
The platform answers with Notify message:
Message Body:
http://<provisioning url&g= t;
Example:
Maxwell 3 and basic software 2.11.6 wireshark trace example.=
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