Polycom realpresence 1800 Administrator's Manual page 619

If the Roll Call option is enabled, you must assign the appropriate audio files to all message types.
21 Click the arrow to open the Message File list and select the appropriate audio file.
Conference IVR Service Properties - Roll Call Messages
Roll Call Message
Roll Call Record
Roll Call Joined
Roll Call Left
Roll Call Review
Once a conference is enabled for Roll Call, Roll Call can be disabled using the #42 or enabled using
the * 42 DTMF Codes. or enabled with all connected participants in the conference receiving the
<name> has joined/left the conference announcement.
For all connected participants in the conference while the Roll Call is disabled (#42)
 Joining participants are requested to say their name.
 The conference is not interrupted with join/left announcements.
 Roll call review is possible.
For all connected participants in the conference while the roll call is enabled (*42)
 Joining participant are requested to say their name.
 The conference is interrupted with join/left prompts.
Polycom®, Inc.
Description
Requests participants to state their name for recording, when they connect to
the conference.
Note: The recording is automatically terminated after two seconds.
A voice message stating that the participant has joined the conference.
In Collaboration Server 2000/4000,
Note:
IVR_ROLL_CALL_USE_TONES_INSTEAD_OF_VOICE is set to YES, the
system does not playback the Roll Call names when participants enter the
conference. However, the voice message will be played, unless it is replaced
with tone file. In such a case, the use of tones requires the uploading of the
appropriate tone files in *.wav format and replacing the Roll Call Joined
message file with the tone file.
A voice message stating that the participant has left the conference.
In Collaboration Server 2000/4000,
Note:
IVR_ROLL_CALL_USE_TONES_INSTEAD_OF_VOICE is set to YES, the
system does not playback the Roll Call names when participants exit the
conference. However, the voice message will be played, unless it is replaced
with tone file. In such a case, the use of tones requires the uploading of the
appropriate tone files in *.wav format and replacing the Roll Call Left message
file with the tone file.
Played when Roll Call is requested by the chairperson, introducing the names of
the conference participants in the order they joined the conference.
IVR Services
when the system flag
when the system flag
588