Polycom RealPresence 4000 Administrator's Manual page 297

6
Call Flow for TIP Endpoints from a Polycom ITP System
The following describes how a TIP call from Cisco TPS endpoints or TIP calls from a
Polycom ITP system working as a TIP call is placed into the IVR-controlled Entry Queue
and is then connected to a conference:
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Polycom, Inc.
The call is transferred to a conference, which can reside on another MCU.
A TIP call is routed through the application server to the IVR-controlled Entry Queue.
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.
While the call is in the Entry Queue, video is only displayed on the main screen.
DTMF input is collected only once from the main screen. Because TIP uses DTLS, it can
optionally enable re-keying of DTMF input and the calls to the Entry Queue and the
conference can be encrypted.
When the application server has completed the pre-conference IVR, the application
server routes the call to a VMR with the collected password appended to the following
dial string: <conf-id>**<password>@mcu-sig-ip. The MCU now has control of the call.
The call is transferred to a conference, which can reside on another MCU.
Chapter 7-Entry Queues, Ad Hoc Conferences and SIP Factories
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