Multimedia messaging service (from the English. M ultimedia M essaging Service , MFA: [ɛmɛmˈɛs] ) - a system for transmitting multimedia messages (images, melodies, videos) in cellular networks . It is an evolution of the EMS service. Allows you to send messages not only to a cell phone, but also to e-mail. MMS size is limited to 999 kilobytes (MMS 2.0 standard). The operator may impose his own restrictions on the size of the transmitted message.
Some cell phones have a MMS size limit of up to 100 kilobytes . You can insert a photo or video in 3GP format lasting about 10 seconds into this message (it all depends on the codec used, resolution and video quality), or send a small melody of various formats ( MIDI , MP3 , MMF - Synthetic Music Mobile Application Format ), or a small dictaphone recording.
Most CIS operators currently support MMS sizes up to 300 kB, which corresponds to a video lasting 20-40 seconds, or several photos.
Settings for using MMS usually come automatically. If the phone has two SIM cards, settings are made for each number. [one]
When forwarding MMS to a phone that does not support MMS, the recipient will receive a web link , using which he will be able to view this message. To receive MMS, you usually need to pre-configure MMS.
The service was developed by the Open Mobile Alliance (OMA), although it was part of the 3GPP and Wireless Application Protocol .Laziz groups during development.
Content
- 1 principle of operation
- 2 See also
- 3 notes
- 4 References
- 5 Literature
Principle of Operation
An MMS message consists of two parts. The content of the message is stored on a special operator WAP server. The second part is a special SMS message that is sent to the recipient. If the recipient's phone supports MMS, then a notification about the incoming MMS message and an offer to download the main part usually appear on the screen. If the phone does not support MMS, then most often a regular SMS message comes with a WAP-link to the main part.
Very often, the phone provides the ability to automatically download MMS messages. It is also possible to disable MMS downloading in roaming, where payment is usually charged for traffic, and not for one message.
Thus, MMS is an add-on combining SMS and WAP services. The differences are only in the positioning of the service and in a separate tariffication. MMS is most often paid by the sender at a fixed price, excluding traffic , and for the recipient they are free. However, when roaming, traffic may be charged.
See also
- MMS camera
- Value-added service
- SMS
Notes
- ↑ Why MMS is not sent from the android: the main reasons and their solution . Date of treatment January 16, 2019.
Links
- WAP MMS Architecture Overview (link not available) . WAP Forum (April 25, 2001). Date of treatment July 29, 2015. Archived March 4, 2016.
- WAP MMS Client Transactions (inaccessible link) . WAP Forum (January 15, 2002). Date of treatment July 29, 2015. Archived May 22, 2013.
- Specification Information Note for WAP MMS Client Transactions (unavailable link) . WAP Forum (October 9, 2001). Date of treatment July 29, 2015. Archived March 4, 2016.
- MMS Encapsulation Protocol (Approved Version 1.3) . Open Mobile Alliance (September 13, 2011). Date of treatment May 29, 2017.
Literature
- Le Bodick G. Mobile Communications: SMS, EMS and MMS Services and Technologies. Per. from English - M. KUDITS-IMAGE, 2005 .-- 448 with ISBN 5-9579-0057-5
- 3GPP TS 22.140 MMS Specification. Stage 1.
- 3GPP TS 23.140 MMS Specification. Functional description. Stage 2.