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Cisco Internet Service Node (ISN) Product Description
OL-1250-03
Chapter 1 Introduction
Sample ISN Call Flows
8.
Meanwhile, the Voice Browser retains signaling control over call control over both Gateways, using
the H245 signaling channel.
the H245 signaling channel.
Note
The processes described in Steps 6-8 use the H245 Empty Capability Set feature. This is a
mechanism the Voice Browser uses to tear down a RTP stream and cause it to be redirected
somewhere else.
mechanism the Voice Browser uses to tear down a RTP stream and cause it to be redirected
somewhere else.
ISN IP Takeback and Transfer
A powerful feature of the ISN is its ability to re-route a call through the IP network by doing a takeback
of the outbound call and transferring the call to a new destination.
of the outbound call and transferring the call to a new destination.
shows an example of an ISN IP takeback and transfer.
Note
The call flow in
presumes the call was previously routed by the ISN to GW_2, using IP
Transfer.
Figure 1-18 ISN IP Takeback and Transfer
The takeback and transfer flow in
is as follows:
1.
An agent initiates call transfer.
2.
The NAM/ICM sends route information and instructions informing the Application Server to
transfer the call.
transfer the call.
3.
The Application Server generates a VXML page with instructions and sends it to the Voice Browser.
4.
The Voice Browser conducts a lookup at its Gatekeeper to determine the IP address where the call
should be transferred.
should be transferred.