SIP Phone Configuration Guide
Sets the ringer volume (0 is OFF).
Sets the absent timeout (the interval after going off hook with no action taken) in seconds.
After the absent timeout, the phone returns to idle mode.
Sets the speakerphone volume.
Sets music on hold timeout.
6.6.11 Call Settings ("call_settings" Module)
call_settings.account.1.block_anonymous_enable
Enables or disables anonymous call blocking.
0 (disabled), 1 (enabled)
call_settings.account.1.fwd_always_enable
Enables call forward always
0 (disabled), 1 (enabled)
call_settings.account.1.fwd_always_target
Call forward target number