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NTP – Network Time Protocol
Synchronisation protocol which syn
-
chronises the time within IP-based
networks and the Internet. NTP is
realised via decentral and synchro
-
nised time servers which are located
on the Internet. Without a central
time server, time differences could
arise between devices in IP-based
networks. Significant time differ-
ences can lead to malfunctions
within IP-based networks.
Operating manual
Current Access system documenta
-
tion including all changes to hard
-
ware and software components.
In addition, responsible contact
partners, regular measures for safe
-
guarding operation and instructions
for emergencies can be documented
(logbook).
PoE – Power over Ethernet
Power over Ethernet supplies an
indoor station or another PoE-
capable device via the connected
network cable. Network-capable
devices can be decentrally and indi
-
vidually supplied with PoE injectors
or centrally supplied via PoE-capable
distribution components (e.g.
switches). PoE is divided into various
power classes. PoE is standardised
according to IEEE 802.3… and is
continually developed and improved.
QoS – Quality of Service
Process for determining the transfer
behaviour of selected services in net
-
works. With QoS, different network
protocols are parametrised in order
to influence factors such as band-
width and transport priority of a net
-
work protocol to ensure the required
network behaviour. For example,
QoS provides high transport priority
and bandwidth for the telephony
in an IP-based network in order to
ensure that it works correctly.
Router
Network components which connect
two or more IP-based networks with,
if necessary, different network proto
-
cols and/or network address spaces
and enable data traffic between
these networks or even the Internet.
A router can also be used within an
IP-based network for the internal
separation or connection of several
private networks with different net
-
work address spaces. Routers come
in a variety of designs with different
equipment versions relating to the
range of functions and the security
functions.
->
NAT
RTP – Real-Time Transport
Protocol
Protocol for continuous and packet-
based transmission of real-time
sensitive multimedia data streams
(audio, video, text, etc.) in IP-based
networks. RTP is used with SIP
to transport the audio and video
streams of the call and is normally
operated via the UDP protocol.
->
SIP, UDP
SIP – Session Initiation Protocol
Network protocol for standardised
control and implementation of a
communication connection (session)
between at least two location-
independent users in IP-based net-
works. SIP is used as a protocol in
the Access system and IP telephony
(VoIP). SIP is internationally accepted.
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VoIP,
SIP Client
SIP Client
Hardware or software-based applica-
tion which uses the SIP standard for
location-independent communica-
tion with other SIP-capable applica-
tions within IP-based networks. SIP
clients include SIP telephones (VoIP)
or VoIP apps on mobile phones, for
example.
