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time, and access points can share a data
connection. In the UMTS network, data
connections remain active during voice
calls. You can, for example, browse the
web faster than previously possible while
simultaneously speaking on the phone.
UPIN PIN code used in UMTS network.
UPUK UPIN Unblocking Key. UPUK code is
required to change a blocked UPIN code
or PIN2 code. The length of the code is 8
digits.
USIM SIM card used in UMTS network.
USSD
command
A service request, such as request to
activate an application or configure
various settings remotely, that you can
send to your operator or service provider
with your device.
VoIP Voice over IP technology. VoIP is a set of
protocols that facilitate phone calls over
an IP network, such as the internet.
VPN Virtual private network. VPN creates a
secure connection to compatible
corporate intranet and services, such as
e-mail.
WAP Wireless application protocol. WAP is an
international standard for wireless
communication.
WEP Wired equivalent privacy. WEP is an
encryption method that encrypts data
before it is transmitted in WLAN.
WLAN Wireless local area network.
WPA Wi-Fi Protected Access. Security method
for WLAN.
WPA2 Wi-Fi Protected Access 2. Security method
for WLAN.
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Glossary