Digium phones will, typically, automatically restart themselves whenever they receive a configuration parameter that necessitates a full restart.
Otherwise, Digium phones, beginning with firmware 1.1.0, may be remotely notified to reconfigure by using a check-sync SIP NOTIFY Event sent from the Asterisk CLI. This feature is enabled by default and is controlled by the:
setting for XML-configured phones or by the enable_check_sync parameter for DPMA-configured phones.
Older versions of Asterisk may not have a properly configured sip_notify.conf file to allow sending the reconfigure notices from the Asterisk CLI. To enable this functionality, add the following lines to pjsip_notify.conf if they are not already present:
Following an Asterisk reload or restart, Digium phones may then be remotely sent reconfigure notices by executing the following Asterisk CLI command: