Conference calls allow several people to communicate simultaneously. During a conference call, you can exit the conference call to answer other calls and then return to the conference, or exit permanently while the other participants continue speaking. Avaya one-X Agent allows you to add up to five participants to a conference call. 
Note
Note Before initiating a conference call, you must have at least one active call in the Work List window. This call will be the first conference participant.
Note If a call is TTY call, then you cannot make a conference call. The conference fails and an error message appears.
Avaya one-X Agent offers two types of conference calls:
Direct Conference: You add participants to the conference call without speaking to them.
Consultative Conference: You speak to participants before adding them in to the conference call.