How to Enable/Disable Call Waiting
Call waiting is a feature on a handset that allows the phone to ring when you're already on a call, instead of sending a busy tone. Call waiting is enabled by default.
On all devices call waiting is enabled by default, if you want to disable call waiting you must use an override.
IMPORTANT: If the device is in a queue and you want call waiting enabled, you also need to make sure that the max allowed calls for the agent is increased from 1.
The overrides for this are as follows:
Yealink
call_waiting.enable="0"
Setting this to "0" will disable call waiting, "1" will enable it.
Polycom
call.callWaiting.enable="0"
Setting this to "0" will disable call waiting, "1" will enable it.
Grandstream
P91="0"
Setting this to "1" will disable call waiting, "0" will enable it.
Fanvil
call.port.1.CallWaiting ="0"
Setting this to "0" will disable call waiting, "1" will enable it.