The conference feature allows you to conference other parties (including yourself) into a call. The system supports multiple conferences of up to 64 parties in total, including up to 2 external analog trunk in each conference.
To Create a Conference Call
1.While active on a call, press Feature 3. The first party is now on hold.
2.When you hear dial tone, dial the telephone number of the second party.
3.When the call is answered press Feature 3 again to add the second party to the call. All parties hear a single beep to indicate that they are in a conference call.
4.You can now speak to the first and second parties.
5.Repeat the steps above to add more parties.
To Hold a Conference Call
If you need to answer or make another call during a conference, you can hold in the same way as for normal calls. When you put a conference call on hold, the other parties can still talk to each other.
•! WARNING
Only hold a conference that you know is taking place on your own telephone system. If you hold a conference that you have joined on another telephone system, that conference will hear hold music.
1.Press the 
HOLD button.
2.Press the HOLD button to cycle between your current call, dial tone and the held call.