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74 Glossary
network or system (your home network), but if it is not in range or
unavailable, it will select another system. International roaming is
based on agreements between network operators in different coun-
tries.
Line 1/Line 2
see Alternate Line Service above.
Menu System
is the easiest way to access all the phone’s functions. The menus are
arranged to be accessed and viewed when scrolling with the arrow
keys.
Network
a mobile phone network or system consists of a network of cells. A
radio base station serves each cell from where calls are forwarded to
and received from your mobile phone by wireless radio signals.
Operator
To be able to use your phone, you need a subscription to a network.
You get this subscription from a network operator, together with a
SIM card that you need to use with your phone.
Phone Book
a memory on your SIM-card where phone numbers can be stored and
accessed by name (alpha memory search) or position.
PIN
Personal Identification Number – a code used for all GSM-based
phones to establish authorization for access to certain functions or
information. The PIN code comes with your subscription.
PIN2
Personal Identification Number 2 – an authorization code which is
used only for special services.
PUK
Personal Unblocking Key – used to unlock a blocked SIM card. Most
operators will give you a PUK when you subscribe.
Roaming
Within your home network, this means that your mobile phone auto-
matically sets up communication procedures with different radio base
stations when on the move.