In a Cisco Unified Communications Manager design where +E.164 destinations are populated in directory entries, which call routing practice is critical to prevent unnecessary toll charges caused by internal calls routed through the PSTN?
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In a Cisco Unified Communications Manager (CUCM) design where +E.164 destinations are populated in directory entries, it is critical to prevent unnecessary toll charges caused by internal calls routed through the PSTN. To address this issue, the call routing practice that should be used is forced on-net routing.
Forced on-net routing is a call routing practice that forces calls to stay within the enterprise network and not be routed through the PSTN. It ensures that internal calls between endpoints within the enterprise network are not unnecessarily routed through the PSTN and incur toll charges. By using forced on-net routing, the call is directed to the destination endpoint within the enterprise network through the most direct and cost-effective path.
Automated alternate routing is another call routing practice that is used to reroute calls through an alternative path when the primary path is unavailable. It is not directly related to preventing toll charges for internal calls.
Forced authorization codes and client matter codes are call routing practices used to restrict or track calls made by specific users or groups. They are not related to preventing toll charges for internal calls.
Tail-end hop-off is a call routing practice used in the context of VoIP-to-TDM gateways. It involves the transfer of responsibility for call routing and termination from the VoIP network to the PSTN network at the point closest to the destination. It is not related to preventing toll charges for internal calls.
Therefore, the correct answer is A, forced on-net routing.