You can create a conference call in the following way:
After you have logged into your account: (The same way you log in to get your voice-mail.)
1. Hit the # key (you will hear a dial tone)
2. Dial 9 + phone number
3.. Then Hit ** (hit star key twice - rapidly)
4. Dial 9 + phone number
Repeat for other parties (up to seven - including you), and then…
5. Then Hit **, and then the 5 key, to conference all calls