300-070 Question #140: Real Exam Question with Answer & Explanation

The correct answer is B: add PSTN route patterns pointing to the gateway. To route outbound PSTN calls through an H.323 gateway in Cisco Unified CallManager, two tasks are essential: (B) Add PSTN route patterns pointing to the gateway - route patterns define the dial strings (e.g., 9.@ or 9.[2-9]XXXXXXXXX) that CUCM uses to match outbound PSTN calls an

Question

Which two Cisco Unified CallManager tasks are required to route calls from Cisco Unified CallManager to the PSTN via an H.323 gateway? (Choose two.)

Options

Aconfigure the IP phones with an external phone number mask
Badd PSTN route patterns pointing to the gateway
Cadd a gatekeeper from the Device menu
Dconfigure the signaling protocol used on the voice circuit
Econfigure the voice endpoints in Cisco Unified CallManager
Fadd an H.323 gateway from the Device menu

Explanation

To route outbound PSTN calls through an H.323 gateway in Cisco Unified CallManager, two tasks are essential: (B) Add PSTN route patterns pointing to the gateway - route patterns define the dial strings (e.g., 9.@ or 9.[2-9]XXXXXXXXX) that CUCM uses to match outbound PSTN calls and route them to the correct gateway or route group; and (F) Add an H.323 gateway from the Device menu - you must explicitly define the H.323 gateway in CUCM (Device > Gateway) so CUCM knows the gateway's IP address and can send H.225/H.245 signaling to it. External phone number masks, gatekeepers, and endpoint configuration in CUCM are optional or unrelated tasks for basic PSTN routing.

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