Calling Line Identification
Services (Caller ID)
Service allowing subscribers to view
or block the telephone numbers of
callers.
MMS (Multimedia Message Service)
A message service for the handset
environment, standardised by the
WAP Forum and the 3rd Generation
Partnership Program (3GPP). For
phone users, MMS is similar to Short
Message Service (SMS)-it provides
automatic, immediatedelivery of
usercreated content from phone
to phone numbers, thus the traffic
goes from phone to phone. MMS
also provides support for e-mail
addressing, so that messages can
also be sent by email. In addition
to the text content of SMS, MMS
messages can contain still images,
voice or audio clips, and later
also video clips and presentation
information.
MP3
Moving Picture Experts Group Layer-
3 Audio. A file format to provide
highquality audio whose quality is
equal to that of CD. MP3 is a digital
audio standard developed by MPEG,
or Moving Picture Experts Group and
is widely used for digital audio files.
MPEG4
Motion Picture Experts Group 4. A
digital video standard developed by
MPEG or Moving Picture Experts
Group. MPEG4 compresses video
data so that a large video file can be
transmitted, and saved more easily.
MPEG4 is suitable especially for
mobile environment.
Multimedia
Multimedia means media that include
various media data such as voice,
character string, image, and video
data. Currently, the meaning of
multimedia includes services provided
through multimedia.
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