Blocking Ghost Calls on Yealink Phones

Depending on the firmware of your Yealink Handset, you will find the Accept SIP Trust Server Only option in one of two places.

Press the OK Button on the handset to obtain the IP Address. After logging into the handset via your web browser (default username/password is admin/admin):

1. Click Features Tab
2. Click General Information Option
3. Scroll to: Accept SIP Trust Server Only and set to "Enabled"

or if the option is not there, try:

1. Click Account Tab
2. Click Advanced Menu Option
3. Scroll to: Accept SIP Trust Server Only and set to "Enabled"