Polycom realpresence 1800 Administrator's Manual page 631

6 Click the Conference ID tab.
The New Entry Queue IVR Service - Conference ID dialog box opens.
7 Select the voice messages:
Entry Queue IVR Service Properties - Conference ID
Field/Option
Request Conference ID
Retry Conference ID
8 Assign an audio file to each message type, as follows:
 In the Message File column, click the table entry, and then select the appropriate audio message.
Polycom®, Inc.
Description
Prompts the participant for the conference ID.
When the participant entered an incorrect conference ID, requests the
participant to enter the ID again.
IVR Services
600