Change ring group via feature code

I have three ring groups:

  1. This is a ring group with all my extensions at Location 1 (Primary Location).
  2. This is a ring group with all my extensions at Location 2 (Secondary location).
  3. This is a ring group that includes 601 and 602.

Basically the secondary location is a vacation home that we also rent out. when we are at the home and we receive calls I want the inbound route to go to Calling Group 602, resulting in all phones at both location to ring.

When we are not at the secondary location, or the house is being rented out I do not want the phones at the secondary location to ring, and as such the inbound route to go to Calling Group 600.

Is there anyway this can be changed by dialing a feature code?

Thanks

Andrew

Call flow control.