Etiquette: Interrupting your supervisor having a meeting
Is what I did wrong?


Picking up his phone might not have been the best idea, unless he specifically asked you to do so. What if the call received was a personal one? How would you handle that? Then interrupting a meeting to relay this information was not a good idea. However, you will make many wrong decisions but it's important to learn from them.


  How should I approach him afterwards?


I advise open communication this case. Begin with an apology then continue by explaining your reason and end by asking what process he would like you to follow should this occur again in the future. Finally, ask for clarification if the answer is vague.

Example:

"Apologies for answering your phone &amp; interrupting your meeting" 

"but I believed this call would be urgent."

"If someone calls again, what would you like me to do?"

"Should I answer &amp; take a message? Should I ask them to wait? Should I interrupt you if you're in a meeting?"