User Guide for the SIP-T21P IP Phone783. Enter the numbers in the DND Authorized Numbers field.For multiple numbers, enter a comma between every two numbers.4. Click Confirm to accept the change.When DND is enabled on the phone, the phone can still receive incoming calls fromthe numbers specified in the DND Authorized Numbers field.NoteYou can configure your phone to forward incoming calls to another party by the staticforwarding. You can also forward calls while your phone is ringing, refer to the dynamicforwarding.Static ForwardingThree types of static forwarding: Always Forward: Incoming calls are immediately forwarded. Busy Forward: Incoming calls are immediately forwarded if the phone is busy. No Answer Forward: Incoming calls are forwarded if not answered after a periodDND authorized number is configurable via web user interface only.
