Zoom ADSL X6v 5697 - Manual (Page 47)

There are two cases where you should disable Call Waiting:
• If you have enabled Call Forward on Busy on the Call
Forwarding page. (See page 45.)
• If you have configured a Fax Transmission Mode on the
Audio Settings page. (See page 54.)
Incoming Call Blocking
This feature applies to VoIP calls only.
On the User Configuration menu, click Incoming Call
Blocking to enable or disable blocking of anonymous calls (calls
that do not provide Caller ID) and specify phone numbers from
which you will not accept calls:
You can enter up to 30 phone numbers that will be blocked by the
X6v.
By default, Block Anonymous Calls and Block Listed
Incoming Calls are both disabled.
47 Chapter 4: Setting Up VoIP Service