At all 60 of my former locations, we had the line's app & Ring on Recpt phone all Lines set to Recpt to PRIME, Recpt phone set to REDIRECT (YES), program a button as CFW and the number.
This is a Signature and not part of the answer, it appears on every reply.
This is an Analogy so don't take it personally as some have.
Why change the engine if all you need is to change the spark plugs.