READ Free Dumps For Cisco- 400-051
| Question ID 12927 | In a SIP REFER-based call transfer, which SIP message is being used by the recipient to
notify the originator that the final recipient was successfully contacted?
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| Option A | 200 OK
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| Option B | NOTIFY with a message body of 200 OK
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| Option C | 202 Accepted
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| Option D | 100 Trying
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| Option E | 200 BYE
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| Correct Answer | B |
Explanation Explanation: The Refer method always begins within the context of an existing call and starts with the originator. The originator sends a Refer request to the recipient (user agent receiving the Refer request) to initiate a triggered Invite request. The triggered Invite request uses the SIP URL contained in the Refer-To header as the destination of the Invite request. The recipient then contacts the resource in the Refer-To header (final-recipient), and returns a SIP 202 (Accepted) response to the originator. The recipient also must notify the originator of the outcome of the Refer transaction--whether the final-recipient was successfully or unsuccessfully contacted. The notification is accomplished using the Notify Method, SIPs event notification mechanism. A Notify message with a message body of SIP 200 OK indicates a successful transfer, while a body of SIP 503 Service Unavailable indicates an unsuccessful transfer. If the call was successful, a call between the recipient and the final-recipient results.
| Question ID 12928 | Which device is the initiator of a StationInit message in a Cisco Unified Communications
Manager SDI trace?
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| Option A | Cisco Unified Communications Manager
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| Option B | MGCP gateway
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| Option C | Cisco Music on Hold server
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| Option D | SCCP IP phone
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| Option E | SIP Proxy Server
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| Correct Answer | D |
Explanation Explanation: Station Init means that an inbound Transmission Control Protocol (TCP) message from a Skinny station reached CallManager. A Skinny station is any endpoint that uses the Skinny protocol to communicate with CallManager.