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Cisco Internet Service Node (ISN) Product Description
OL-1250-03
Chapter 4 VoIP Routing
Call Transfers and Outbound Routing
In the Comprehensive mode of ISN there is also a switched transfer that occurs when there is a need to
perform ASR/TTS IVR treatment. In this case, the transfer is always to a Cisco VXML-enabled voice
gateway. Only voip dial-peers are involved in that transfer (no pots dial-peer). The target voip dial-peer
must be configured for G711Ulaw since that is the only codec that is supported as of this writing by the
known ASR/TTS vendors.
perform ASR/TTS IVR treatment. In this case, the transfer is always to a Cisco VXML-enabled voice
gateway. Only voip dial-peers are involved in that transfer (no pots dial-peer). The target voip dial-peer
must be configured for G711Ulaw since that is the only codec that is supported as of this writing by the
known ASR/TTS vendors.
Note
For more information on Prompt Codec and IPCC Transfer Codec commands, see the Cisco Internet
Service Node (ISN) Configuration and Administration Guide.
Service Node (ISN) Configuration and Administration Guide.
IP Transfer Example (ACD Routing)
The ISN uses a Gatekeeper to determine the correct VoIP endpoint to transfer calls to when it uses the
IP mode. In
IP mode. In
, our endpoints are two Voice Gateways, Moe and Larry, which provide redundant
access to a call center ACD. Moe has the IP address 10.10.10.1, while Larry has the IP address
10.10.10.2. For simplicity’s sake, we assume the Gateways and the ISN are in the same H.323 zone,
controlled by Gatekeeper Stooge.
10.10.10.2. For simplicity’s sake, we assume the Gateways and the ISN are in the same H.323 zone,
controlled by Gatekeeper Stooge.
Figure 4-3
IP Transfer Example
In this example, the ACD uses a numbering plan in the format xxxxyyzzzz, where:
•
xxxx is a location code.
•
yy is the destination trunk group on the ACD.
•
zzzz is the DNIS (Dialed Number Identification Service), identifying an ACD agent skill group,
service, extension, etc.
service, extension, etc.
The ISN initiates the transfer using all these digits:
•
The Gatekeeper uses the xxxx digits to determine a destination Gateway (8888 for the ACD in our
example).
example).
•
The Gateway uses the yy digits to determine the correct ACD trunk group.
•
The Gateway outpulses the zzzz digits to the proper ACD trunk group, which uses them to connect
the call to an agent.
the call to an agent.