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M-P
MMS
Multimedia Messaging Service is a new standard that is being defined for use
in advanced wireless terminals. The service concept is derived from Short
Message Service and allows for non-real-time transmission of various kinds of
multimedia contents like images, audio, video clips, etc. As a further evolution
of the current text mail, for example, electronic postcards, audio/video clips,
etc. can be sent.
MPEG4
MPEG4 is a technology for compressing voice, video and related control data
and is one of the MPEG (Moving Picture Experts Group) international
standards. It is currently a focus of attention due to the fact that it enables
high speed and stable video transmission even in heretofore difficult
environments such as mobile communication. Incorporation of this leading
edge technology will imbue 3G terminals with a rich multimedia capability.
MS
Mobile Switching Center. Equipped with a switching function for mobile
communication.
NMT
Nordic Mobile Telephone. Analog cellular system originally developed for use
in Finland, Sweden, Denmark, Norway and Iceland. NMT is operated in 450
MHz and 900 MHz bands.
PACKET SWITCHING SERVICE
A communication system whereby data is divided and transmitted in packets
of set size. Its special feature is that communication between terminals with
differing speeds and formats is possible since transmission/ reception is
performed after data has first been stored at the exchange. In contrast to
circuit-switching where a circuit is occupied until all data transfer has been
completed, packet-switching improves efficiency through common use of
circuits.
PCN
Personal Communications Network. A standard for digital mobile phone
transmissions operating at a frequency of 1800 MHz (also referred to as OSM
1800). Adopted mainly in urban areas of Europe.
PCS
Personal Communication Service. Digital mobile phone network which
operates at the 1900 MHz frequency band. GSM 1900 is one of the
technologies used in building PCS networks (also referred to as PCS 1900 or
DCS 1900). Such networks employ a range of technologies including GSM,
TDMA and cdmaOne.
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