What is first preference condition matched in a SIP-enabled incoming dial peer?
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A. B. C. D.A.
https://www.cisco.com/c/en/us/support/docs/voice/ip-telephony-voice-over-ip-voip/211306-In-Depth-Explanation-of-Cisco-IOS-and-IO.html#anc8In Cisco Unified Communications Manager (CUCM), a dial peer is used to define how calls are routed. When a SIP-enabled incoming dial peer is configured, the router will examine the incoming call and use a set of conditions to determine how to route the call. These conditions are evaluated in a specific order, and the first condition that matches will be used.
The four conditions that can be used to match a SIP-enabled incoming dial peer are:
A. Incoming URI: This condition matches based on the Uniform Resource Identifier (URI) of the incoming call. The URI is a string that identifies the recipient of the call, and can include information such as the phone number, SIP address, or other identifier.
B. Target carrier-ID: This condition matches based on the carrier-ID that is assigned to the incoming call. The carrier-ID is a numeric identifier that is used to identify the carrier or service provider that is responsible for the call.
C. Answer-address: This condition matches based on the answer-address that is specified in the incoming call. The answer-address is the IP address or hostname that is used to deliver the call to the recipient.
D. Incoming called-number: This condition matches based on the phone number that is dialed by the calling party.
When a call arrives, the router will evaluate each of these conditions in order, starting with the incoming URI. If the incoming URI matches a configured value in the dial peer, then that dial peer will be selected as the route for the call. If the incoming URI does not match, the router will move on to the next condition, and so on, until a match is found.
Therefore, the answer to the question "What is first preference condition matched in a SIP-enabled incoming dial peer?" depends on the specific configuration of the dial peer and the characteristics of the incoming call. It is possible that any of the four conditions listed above could be the first preference condition matched, depending on the specifics of the call and the configuration of the router.