Panasonic EB-SC3 - Manual (Page 123)

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Glossary of Terms
PIN Personal Identification Number used for SIM card
security. Supplied by your service provider. If the PIN or
PIN2 is entered incorrectly several times (three times for
PIN2), the PIN or PIN2 will be blocked.
PIN2
PLMN
Public Land Mobile Network. A network that provides land
mobile telecommunications services.
PUK PIN or PIN2 Unblocking Key. Used to unblock the PIN or
PIN2 code. Supplied by your service provider. If the PUK
or PUK2 is entered incorrectly 10 times, your SIM card
will be blocked permanently. All information stored in the
SIM card will be lost and the SIM card will need to be
replaced.
PUK2
Roaming
The ability to use your phone on networks other than your
home network.
SDN
Service Dialling Number. This number enables you to
access special services provided by your network
operator, such as customer support, emergency services,
etc.
Service
provider The organisation responsible for providing
supplementary services and applications to phones.
SIM
Subscriber Identity Module. A small smart-card which
stores unique subscriber and user-entered information
such as Contacts entries and SMS messages. Supplied
by your service provider.
STK
SIM Tool Kit. Supplied by your service provider. It is
included in the SIM card to offer value-added services.
WAP
Wireless Application Protocol. The communication
standard which enables you to download resources from
the Internet to your phone.