The MMSC receives the MMS message submission and validates the message sender. ![]() Some devices will use wireless profiled HTTP and TCP through a WAP 2.0 proxy server, while other devices will use the Wireless Session Protocol, WSP, through a conventional WAP proxy server/gateway.) (Note: In most environments, the HTTP POST will be routed through a proxy server. The encoded MMS message includes all of the content of the MMS message, as well as header information, including a list of intended recipients for the message. The sending phone performs an HTTP POST to an MMSC of the MMS message encoding in the MMS Encapsulation Format, as defined by the Open Mobile Alliance.The sending phone initiates a data connection that provides TCP/IP network connectivity, usually over GPRS. ![]() In a typical phone-to-phone MMS transaction, the process of sending and receiving the MMS message works like this: ![]() This URL pointer is a dynamically generated URL for the MMS message content which is stored on the MMSC.
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