Both the phone system and one-X Portal can allow you to make and receive multiple calls. Therefore even when you are active on calls you are not necessarily seen as being busy to further incoming calls.

However, there are some conditions where you will be treated as being busy to any further incoming calls. When this occurs, the following happens to the incoming call, in order of priority of use:

1.If you have a Forward on Busy destination enabled, the call is forwarded to that destination.

2.If you have voicemail enabled, the call is sent to voicemail.

3.If neither of the above is available, the caller receives busy indication.