3-way (conference) call on Grandstream Phones

TL;DR

To start a 3-way conference call on a Grandstream phone, press the conference button, which has an icon of three people. This will bring up the conference dialing screen where you can dial the third party's number and press send. Once the third party is on the line, press the Conf/Call softkey to initiate the 3-way conference. This allows you to easily add a third party to an existing call.

You can start a 3-way conference call from most Grandstream phones by simply pressing the conference button on your phone when it is time to bring in the third party. (The button has an icon that looks like three people on it.)

Once you have pressed the conference button it will bring up the conference dialing screen. From there, dial the third party number and press send! As soon as you have the third party on the line you can then press the Conf/Call softkey to initiate the 3-way conference!