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Because of the security model each one implements, the two versions can't communicate with each other. Plus, the

Brand
brand client

Professional edition can only perform direct calls to another

Brand
brand client

Professional Devices. On the other hand the

Brand
brand client

Enterprise Edition can also perform Conference Calls and Three-Way Calls.

Conference

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Rooms

The The conference call is a call in which more than one person room is the kind of call that more persons can partecipate. The conference calls are usually defined as "rooms", whose access can be limited by by time settings or  or pass code. In Brand

brand	server

the conference calls can be provided on a Secure Call base if using the

Warning
Conference rooms can be accessed only by using  Brand brand client Enterprise

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Edition.

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Conference Calls

The Three-Way callConference Call, as the its name implies, is a call among among three partecipants. The third user is added to a precedent running conversation by one of the two parteipants. 

Warning
Conference rooms can be accessed only by using  Brand brand client Enterprise Edition.

Call transfer

Call transfer is a typical PBX performance which is implemented in

Brand
brand server

as well, but only if the users are running a

Brand
brand client

Enterprise Edition. One of the partecipant can hold on his/hers peer and perform a new call to the number to which trasfer the call. If the desired number picks up the call, then the transferrer can close the communication and let his/hers peer talk with the trasferred number.

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