Data connection
A data connection is a broadband connection to a packet-oriented network such as the Internet , which enables services such as telephony , television , radio , WWW and e-mail ( triple play ) via a single connection.
The data connection can be wired over the last mile ( unbundled DSL via the subscriber line of the telephone network , cable internet via the cable television network , data cables made of copper or fiber optics) or wirelessly via a cellular- based access or using a wireless local loop .
In particular , data connections based technically on the regulated bit stream access or on the completely unbundled subscriber line can create far-reaching competition between Internet service providers and telephone companies despite a natural network monopoly of the subscriber network .
With the transition from the classic separate connections to a uniform data connection, “multimedia sockets ” with different connections for telephones, televisions, radios and LAN data connections are offered, for which only a single special cable has to be laid. This multimedia socket with different connections can later be replaced by a socket with a uniform data connection.
If, as with the conventional telephone network, communication with the police or fire brigade is to be possible via the data connection in the event of a power failure in the local power grid, the subscriber-side network termination must be supplied with emergency power independently of the local power supply, for example by means of a UPS . Power over Ethernet is used to connect end devices in the LAN to this autonomous energy supply .