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# MMS (Multimedia Messaging Service) protocol overview

Caution:

- This protocol is supported for replay only. Support for this protocol will be discontinued in future versions.

- To use MMS protocol, you must first manually register the following dlls, using the regsvr32 command:

  - regsvr32 MMSEngine.dll
  - regsvr32 MM1Client.dll

The MMS protocol is useful for sending MMS messages between mobile devices.

MMS (Multimedia Messaging Service) is an extension of the SMS protocol. An MMS message typically includes a collection of attachments. MMS usually requires a third generation (3G) network.

To receive an MMS message, a mobile phone receives an MMS notification over SMS. The SMS message can be received over various SMS protocols such as SMPP, UCP, and CIMD2. The SMS message contains a unique path to the MMS message stored in the MMSC server's database and the mobile phone uses this path to download the message from the SMSC. The current version of VuGen supports the receiving of MMS notifications over the SMPP interface.

Multimedia Messaging Service Vuser scripts support the 1.0 and 1.1 versions of the MMS protocol, as defined by OMA (Open Mobile Alliance organization). Using MMS Vusers, you can send MMS messages to the MMSC server directly over the HTTP protocol.

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