Nokia E51

Page 124
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SIP
Session initiation protocol. SIP is used for
creating, modifying, and terminating
certain types of communication sessions
with one or more participants.
SSID
Service set identifier. SSID is the name
that identifies the specific WLAN.
Streaming
Streaming audio and video files means
playing them directly from the web
without downloading them first to your
device.
UMTS
Universal mobile telecommunications
system. UMTS is a 3G mobile
communication system. Besides voice
and data, UMTS enables audio and video
delivery to wireless devices.
When you use your device in GSM and
UMTS networks, multiple data
connections can be active at the same
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 internet protocol 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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