Yealink SIP-T21 E2 User Manual page 102

User Guide for the SIP-T21(P) E2 IP Phone
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 from
the numbers specified in the DND Authorized Numbers field.
Note
DND authorized number is configurable via web user interface only.
You can configure your phone to forward incoming calls to another party through static
forwarding. You can also forward calls while your phone is ringing; refer to
Forwarding.
Static Forwarding
Three 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 period

of time.
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Dynamic