Not only symposium for solution
MIPCD (Meridian Integrated Personnal Call Director) is avaliable for that purpose.
It give the ability to select the goal of the calls based on the CLID, and time based also. The calls can be redirected up to 5 directions, internal or external, simultaneous or one by one call.
It's a board that seat in IPE or Opt 11 shelf, keycoded, acd based.
The config access is done with a web page, user accessible and password protected
It's expensive but really very very great add-on