DRAG DROP
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Explanation:
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Cisco 642-437 Exam
In the case of Digital Interfaces, when the PBX or central office (CO) switch sends a setup message thatcontains all the digits necessary to fully route the call, those digits can be mapped to an outbound Voiceover IP (VoIP) dial-peer (or hairpin to plain old telephone service (POTS) dial- peer directly). The router/gateway does not present a secondary dial tone to the caller and does not collect digits. It forwards the calldirectly to the configured destination. In the case of analog interfaces, the user only hears the dial tone once(either local or remote), and then dials the digits and gets through to the destination phone. This is calledone stage dialing. When one receives an inbound call from a POTS interface, the Direct Inward Dial (DID)feature in dial-peers enables the router/gateway to use the called number (dialed number identificationservice (DNIS)) to directly match an outbound dial-peer. When DID is configured on the inbound POTS dial-peer, the called number is automatically used to match the destination pattern for the outbound call leg. Theincoming called number command will match the dial-peer that has the DID configured. http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a00800e00d0.shtml