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Subscriber
Identity Module
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n |
ISO
compliant removable smart card, with limited storage and
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computational
functionality
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n |
necessary
for operation of mobile station, and involved in
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location
management, authentication, and ciphering
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n |
one
or more directory numbers per SIM, one or more SIMs per
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subscriber
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n |
SIM
realizes model of “personal mobility” (e.g., the subscriber
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is
the focus of attention and it is he/she who is mobile)
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Mobile
Equipment
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n |
only
emergency calls allowed without SIM
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n |
calls
routed to SIM, not mobile equipment
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