To Add a Third Party to Your Call:

Press and release the phone switch hook to place the first caller on hold.

Hear 3 beeps, then dial tone.

Dial third person.

When third person answers, press and release phone switch hook to add them to the call.

To End Three-Way Calling:

Press and release switch hook to disconnect last party added. If either party hangs up, you can still speak with the remaining party. If party with Three-Way Calling hangs up, all parties are disconnected.