Starting with firmware 18.104.22.168, a new ActionURL trigger allows the phone to check if an incoming call number is blacklisted.
For each incoming call, the phone will send an HTTP request to a server with the caller number as parameter:
If the server answers with a 200 OK, the number is considered as blacklisted and the call will be silently rejected. If the server answers with an error, or if the requests times out (remote_blacklist_action_timer), the call is accepted.
The following settings play into this feature:
- remote_blacklist_action_timer - Defines how many seconds is waited for a reply from the queried web server
- action_blacklist_url - The URL which will be queried for checking the incoming number
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