This is the default type associated with the second applet.
To initiate a direct intercom, user must have a direct intercom shortcut to the remote party's primary line's extension.

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When users are not connected, the shortcut is idle.
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When the user presses the shortcut, its center becomes green.
This means he's connected and actively talking to the remote party.
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When remote party presses its shortcut too, the shortcut's border starts blinking orange and the talker identity of the other user appears in the center.
This means they are both connected and actively talking to each other.
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When the user presses the shortcut again, he stops talking. The other user is still talking.
The shortcut is now purple with a blinking orange border. The name of the talking user is still displayed.
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When the remote party stops talking, the call get terminated.
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