Three-Way Calling allows you to speak to two parties with two different phone numbers at the same time.

To use Three-Way Calling:

Call the first person to be included in the three-way call. With that person on the line, press and QUICKLY release the switch hook (don’t hold the switch hook for more than a second or you’ll hang up on the caller). Listen for three beeps followed by a steady tone. This places that person on hold.
Dial the phone number of the second person you wish to add to your three-way call.

After the second person answers the phone, press and release the switch hook one time to connect to the first person and establish a three-way call. If the line is busy or there is no answer, press and release the switch hook twice to reconnect back to the first party.

Note: You may privately converse with the second party as long as you wish while the first party remains on hold. The first party will remain on hold until you press and release the switch hook to establish the three-way call. After a three-way call is established, you may press and release the switch hook at any time to drop the second party.