sip_notify.conf
Asterisk has the ability to reboot a SIP phone remotely by sending
it a specially formatted, manufacturer-specific NOTIFY
message (defined in
sip_notify.conf) consisting of an event. The phone
receives this event, which it interprets as a reboot request. Other
phones are supported, but as of this writing only phones by Polycom have
been verified to work with this method.
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