Which device is the initiator of a StationInit message in a Cisco Unified Communications Manager SDI trace?
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A. B. C. D. E.D.
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.
In a Cisco Unified Communications Manager (CUCM) environment, a StationInit message is used to initiate the registration process of an IP phone. This message is sent by the IP phone itself to the CUCM server to request registration and to establish a communication channel between the phone and the CUCM.
Therefore, the correct answer to the question is D. SCCP IP phone, as the IP phone is the initiator of the StationInit message.
Option A, Cisco Unified Communications Manager, is not correct because the CUCM server does not initiate the StationInit message. It only responds to the request by sending back the necessary information for the phone to complete its registration process.
Option B, MGCP gateway, is also not correct because MGCP is a different protocol used to control media gateways, and it does not apply to the registration process of IP phones.
Option C, Cisco Music on Hold server, is not correct because the music on hold server is not involved in the registration process of IP phones.
Option E, SIP Proxy Server, is not correct because the SIP protocol is a different protocol used for VoIP communications and is not used in the registration process of SCCP IP phones in a Cisco Unified Communications Manager environment.
In summary, the SCCP IP phone is the initiator of the StationInit message in a Cisco Unified Communications Manager SDI trace.