While on a call, press and release the flash button or switch-hook to place the first caller on hold. When you hear the dial tone, call the third party. When the third person answers and you’re ready to pick up the first caller again, press & release the flash button or switch-hook. All three of you should now be connected.
If the third party did not answer, or you wish to disconnect them, press the switch-hook again – just you and the first caller will remain. If either of the other two parties hangs up, the connection between you and the remaining person will continue.
3-Way Calling with Call Transfer works just like 3-Way Calling, but allows you to drop out, leaving the other two callers connected