Yealink SIP-T48G User Manual page 169

(Optional.) Enter the always forward on code or off code respectively in the On
3)
Code or Off Code field.
If you tap Busy Forward:
b)
Tap the On radio box of the Busy Forward field.
1)
Enter the destination number you want to forward incoming calls to when the
2)
phone is busy in the Forward to field.
(Optional.) Enter the busy forward on code or off code respectively in the On
3)
Code or Off Code field.
If you tap No Answer Forward:
c)
Tap the On radio box of the No Answer Forward field.
1)
Enter the destination number you want to forward unanswered incoming calls to
2)
in the Forward to field.
Tap the gray box of the After Ring Time field, and then select the desired ring
3)
time to wait before forwarding from the pull-down list.
The default ring time is 12.
Basic Call Features
155