If you are a member of a Group (not queue) in 3CX phone system you can pick up other peoples calls by dialing *20* while there phone is ringing and the call will come to you
To make this even easyer save *20* as a speed dial on your phone - https://servicedesk.unitedliving.co.uk/support/solutions/articles/50000082974
If you want to have a group for the people in your team or office please ask IT
This doesnt not include calls coming into queue's to be added to a queue please let IT which queue you want to be added to and then log into that queue