Các yêu cầu để chuyển tiếp tin nhắn ( yêu cầu) trên giao diện MM4 cho phép một tin nhắn đa phương tiện được chuyển giao giữa hai môi trường MMS. Nếu được yêu cầu của các MMSC khởi, MMSC người nhận thừa nhận các yêu cầu về phía trước với một phản ứng về phía trước ( phản ứng). | 296 Mobile Messaging Technologies and Services two distinct MMS environments is provided in Section . The following sections present transaction flows for message forward delivery report forward and read-reply report forward. Routing Forward a Message The request for forwarding a message request over the MM4 interface allows a multimedia message to be transferred between two MMS environments. If requested by the originator MMSC the recipient MMSC acknowledges the forward request with a forward response response . The transaction flow for the transfer of a message over the MM4 interface is shown in Figure . The request is composed of the information elements parameters listed in Table . If requested by the originator MMSC the recipient MMSC acknowledges the forward request with a forward response response . The response is composed of the information elements parameters listed in Table . Unlike forward requests the addressing of forward responses is related to neither the message originator nor the message recipient. Instead the addressing of a forward response is related to special system addresses. The value to be assigned to the To parameter is the value assigned to the X-MMS-Originator-System parameter of the corresponding forward request usually a special system address identifying the originator MMSC . The value to be assigned to the Sender parameter is a special address identifying the recipient MMSC. It is suggested that special system addresses should be formatted in the form system-user@ If the forward request has been processed without error by the recipient MMSC the following value is assigned to the request status code information element X-Mms-Request-Status-Code parameter . Ok this status code indicates that the corresponding request has been processed without errors. If errors occurred during the processing of the forward request the .
