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Chapter 7-Entry Queues, Ad Hoc Conferences and SIP Factories
Polycom, Inc. 7-11
4 In the Entry Queue Mode field, select External IVR Control from the available options:
When the External IVR Control is selected, the connection process of the participant to
the conference via the Virtual Entry Queue is controlled and managed by an external
IVR service of an application server (for example, DMA).
5 Click OK.
Call Flows
The external IVR-controlled Entry Queue can be initiated for various types of calls from SIP
endpoints such as standalone endpoints and Cisco TIP endpoints. Standalone endpoints are
SIP or H.264 TIP endpoints. These endpoints can include HDX systems, multiple
Telepresence (ITP) screens, and RealPresence Desktop client applications.
Call Flow for Standalone SIP Endpoints
The following describes how a standalone SIP endpoint call is placed into the IVR-
controlled Entry Queue and is then connected to a conference:
1 A SIP call is routed through the application server to the IVR-controlled Entry Queue.
2 The MCU answers the call and waits for the IVR media file requests from the
application server. The MCU does not control the call while the call is in the Entry
Queue.
3 The application server may request, through the MCCF channel - IVR package, to play
an audio file and display a slide. When the audio file has finished playing, the MCU
notifies the application server that the audio file has been played for the call.
4 The application server may request, through the MCCF channel - IVR package, to
collect DTMF input such as a conference ID or password, from the caller. The DTMF
input is transferred from the MCU to the application server. When the application
server receives the DTMF input, it validates the input for the required conference ID or
password. If the input is incorrect, the application server will request the MCU to
replay the audio file and collect the DTMF input again. The MCU transfers the DTMF
input to the application server for revalidation.