Knock Knock (Additional Feature)

If a player is on his computer, but currenty not wearing his headset, wich means if you try to talk, you can´t get his attention. It is very frustrating and time consuming, so I would suggest to include something in calls, like the ability of 'Knocking', wich will make a box show up, that cannot be missed and you will be able to talk again.

For Example this occured, as I was in a call with a friend and I told him I would go for a shower. After that I tried to talk to him, but was unable to get his attention for a few minutes. Also messaging didn´t help.