By default, the call waiting service is enable on all extension. You may set the service by Feature Access Codes on the IP phone set.

Deactivate procedure
1) Enter feature code: #17
2) Press "Dial" or "Send" on-screen button
3) Confirm message will be played: "Your call waiting service is now disable"

Activate procedure
1) Enter feature code: *17
2) Press "Dial" or "Send" on-screen button
3) Confirm message will be played: "Your call waiting service is now enable"