Siemens Gigaset A580IP Manual page 184

Symmetric NAT
A symmetric NAT assigns different external IP addresses and port numbers to the
same internal IP addresses and port numbers – depending on the external target
address.
T
TCP
Transmission Control Protocol
Transport
terminates a connection between sender and recipient for transporting data.
TLS
Transport Layer Security
Protocol for encrypting data transmissions on the Internet. TLS is a superordinated
Transport
Toggling Toggling allows you to switch between two callers or between a conference call
and an individual caller without allowing the waiting caller to listen to the call.
Transmission rate
Speed at which data is transmitted in the
measured in data units per unit of time (Mbit/s).
Transport protocol
Controls data transport between two communication partners (applications).
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UDP, TCP, TLS.
U
UDP
User Datagram Protocol
Transport
establish a fixed connection. The data packets ("datagrams") are sent as a broad-
cast. The recipient is solely responsible for making sure the data is received. The
sender is not notified about whether it is received or not.
URI
Uniform Resource Identifier
Character sequence 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 dialing a URI you can call an Inter-
net subscriber with VoIP equipment.
URL
Universal Resource Locator
Globally unique address of a domain on the Internet.
A URL is a subtype of URI. URLs identify a resource by its location on the Internet.
For historical reasons the term is often used as a synonym for URI.
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User ID User
protocol. Session-based transmission protocol: it sets up, monitors and
protocol.
protocol. Unlike TCP,
identification.
WAN or LAN. The transmission rate is
UDP is a non session-based protocol. UDP does not
Glossary
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