I didn't want other people signing into their 3cx MyPhone and being able to see who I am on the phone with. Also, with the old phone system, I was able to group a number of extension in one group so that I could send one group voicemail as opposed to leaving a voice mail for 10 individuals. It is alot easier if the 10 people were in one group assigned to an "extension". Is that possible with the Cisco SPA540G telephones? Why does a blue color appear before a name when they are on a call and orange or yellow for other people?