How can we see which extension ( user) is on line – busy so we do not transfer a line?

That is a great question! One of the great features is that you are able to monitor when other users are on their phone so you are able to know if they are available for a transfer or not. The link: https://comca.st/3Kq2fbl goes over Comcast Business VoiceEdge so that you can learn more about the features. 

This link takes me to the main page of voiceedge: https://business.comcast.com/enterprise/products-services/unified-communications/comcast-business-voiceedge?linkId=148745296 is it possible to point me to the atricle that explains how I do that, or explain here, please? Thank you in advance.