How do you integrate the dial engine into an existing network that runs an earlier version of Cisco Unified CallManager and does not have native SIP trunk support?
A. This integration can be accomplished by using a Cisco IOS router that runs Cisco Unified CallManager Express as the SIP provider and configuring an H.323 Intercluster Trunk (ICT) between the Cisco Unified CallManager and the SIP provider. For detailed information, refer to the Solution Reference Network Design (SRND) for Cisco IPICS Release 2.0(1).
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