Yealink SIP-T2 SERIES Administrator's Manual page 656

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
action_url.dnd_on
Description:
Configures the action URL the IP phone sends when DND feature is enabled.
Example:
action_url.dnd_on = http://192.168.0.20/help.xml?IP=$ip
Web User Interface:
Features->Action URL->Open DND
Phone User Interface:
None
action_url.dnd_off
Description:
Configures the action URL the IP phone sends when DND feature is disabled.
Example:
action_url.dnd_off = http://192.168.0.20/help.xml?IP=$ip
Web User Interface:
Features->Action URL->Close DND
Phone User Interface:
None
action_url.always_fwd_on
Description:
Configures the action URL the IP phone sends when always forward feature is
enabled.
Example:
action_url.always_fwd_on = http://192.168.0.20/help.xml?IP=$ip
Web User Interface:
Features->Action URL->Open Always Forward
Phone User Interface:
None
action_url.always_fwd_off
634
Parameters Permitted Values
URL within 511 characters
URL within 511 characters
URL within 511 characters
URL within 511 characters
Default
Blank
Blank
Blank
Blank