There are two important standards that define MMS technology, one published by the 3GPP (3GPP TS 23.140), and the other a series of MMS specifications published by the Open Mobile Alliance (OMA). These two standard bodies cooperate to define the MMS protocols.
When MMS is discussed, you will often hear details of different MMS related protocols, such as MM1, MM3, MM4, MM7, as well as proprietary protocols such as EAIF, and various vendor specific proprietary variations of MM7. (You might also wonder about MM2, MM5, MM6, MM8, MM9, and others, but they are beyond the scope of this document, and are defined in 3GPP TS 23.140.) http://www.nowsms.com/faq/how-mms-works
另外，还有个TS26.140定义了Multimedia Messaging Service (MMS); Media formats and codecs。 作者: hendouse 时间: 2011-12-28 09:06:24