3 way calls- How to? 3300 or 8100

I need to be able to make 3 way calls for my business. Does the 3300 have this capability? If so, What is the procedure as I can not find it in the users manual.

I have access to an 8100 should the 3300 not have the capability. What is the proceedure to make 3 way calls with the 8100?

3 way calling is typically not a feature of the phone, but of your account. It sounds like you are a Verizon customer, so it is a standard feature of your account.

You can find out more here: Calling Features: 3-Way Calling