Yealink SIP-T20 - Manual (Page 77)

Basic Call Features
65

No Answer Forward: Incoming calls are forwarded if not answered after a period
of time.
You can enable/disable call forward for the phone system, or you can customize call
forward for each or all accounts. Two call forward modes:

Phone (default): Call forward is effective for the phone system.

Custom: Call forward can be configured for each account.
To configure the call forward mode via web user interface:
1. Click on Features->Forward & DND.
2. In the Forward block, mark the desired radio box in the Mode field.
3. Click Confirm to accept the change.
Note
To enable call forward in phone mode:
1. Press .
2. Select Features->Call Forward.
3. Press or to select the forwarding type, and then press .
4. Depending on your selection:
a.) If you select Always Forward:
1) Press or to select Enable from the Always field.
2) Enter the destination number you want to forward all incoming calls to in
Call forward mode is configurable via web user interface only.