User's Manual

50
Picture 56 - Anonymous calls are not allowed on the phone

On the web page [Line] >> [SIP] >> [Advanced Settings], also can disable
anonymous calls.

The setup to disable anonymous calls also corresponds to the SIP line. That is,
the setting under the SIP1 page can only take effect on the SIP1 line.
Picture 57 - Page Settings blocking anonymous call
9.18 Hotline
The device supports hotline dialing. After setting up the hotline dialing, directly pick up
the handset, hands-free, earphone, etc., and the phone will automatically call according
to the hotline delay time.

In the phone [Menu] >> [Features] >> [Advanced] >> [Hotline], click to enter
and all SIP lines will be displayed.

Then set the hotline for each SIP line, which is off by default.