1. Press and release the receiver button to put your call on “hold”. You will hear three
   beeps then dial tone.
2. Dial the third person’s number. You can talk before including the original caller.
3. To begin the three-way call, press and release the receiver button. All three parties
   will be on the line. (If the line is busy or there’s no answer, you can return to the
   original call by pressing and releasing the receiver button.)

NOTE: If the original party hangs up, you can add another third party by repeating steps 1, 2 & 3. To disconnect the third party, press the receiver button twice. Your line is then free to add a different third party by repeating steps 1, 2 & 3. All parties are
disconnected when you hang up.