User guide

227
Glossary
Gigaset C610-C610A IP / AUS / A31008-M2312-C401-1-7619 / Glossary.fm / 03.04.12
Version 4, 16.09.2005
U
UDP
User Datagram Protocol
Transport protocol. Unlike TCP, UDP is a
non session-based protocol. UDP does not
establish a fixed connection. The data pack-
ets ("datagrams") are sent as a broadcast.
The recipient is solely responsible for mak-
ing sure the data is received. The sender is
not notified about whether it is received or
not.
URI
Uniform Resource Identifier
Character string for identifying resources
(e.g., e-mail recipient, http://gigaset.com,
files).
On the Internet, URIs are used as a uniform
identification for resources. URIs are also
described as SIP addresses.
URIs can be entered in the phone as a
number. By dialling a URI, you can call an
Internet subscriber with VoIP equipment.
URL
Universal Resource Locator
Globally unique address of a domain on the
Internet.
A URL is a subtype of the URI. URLs identify a
resource by its location on the Internet. For
historical reasons the term is often used as a
synonym for URI.
User ID
See User name.
User name
Name/number combination for access e.g.,
to your VoIP account or your private address
directory on the Internet.
V
Voice codec
See Codec.
VoIP
Voice over Internet Protocol
Telephone calls are no longer placed and
transmitted over the telephone network but
over the Internet (or other IP networks).
VoIP provider
A VoIP, SIP or Gateway provider is an Inter-
net service provider that provides a Gate-
way for Internet telephony. As the phone
works with the SIP standard, your provider
must support the SIP standard.
The provider routes calls from VoIP to the tel-
ephone network (analogue, ISDN and
mobile) and vice versa.
W
WAN
Wide Area Network
Wide-area network that is unrestricted in
terms of area (e.g., Internet).