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Glossary
Gigaset C590 IP / IM-OST EN / A31008-M2215-R601-1-TE19 / Glossary.fm / 22.12.10
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M
MAC address
Media Access Control address
Hardware address by means of which
each network device (e.g., network card,
switch, phone) can be uniquely identified
worldwide. It consists of six parts
(hexadecimal numbers) separated by "-"
(e.g., 00-90-65-44-00-3A).
The MAC address is assigned by the manu-
facturer and cannot be changed.
Mbps
Million bits per second
Unit of the transmission speed in a network.
MRU
Maximum Receive Unit
Defines the maximum user data volume
within a data packet.
MTU
Maximum Transmission Unit
Defines the maximum length of a data
packet that can be carried over the network
at a time.
Music on hold
Music that is played while you are on a
The waiting participant hears music while
on hold.
N
NAT
Network Address Translation
Method for converting (private)
to one or more (public) IP
addresses. NAT enables the IP addresses of
s
(e.g., VoIP telephones)
to be concealed behind a shared
IP address for the
on the
VoIP telephones behind a NAT router cannot
be reached by VoIP servers (on account of
the private IP address). To "get around" NAT,
it is possible to use either
in the router,
in the VoIP telephone, or for the VoIP
provider to use an
If an outbound proxy is made available, you
must allow for this in the VoIP settings for
your phone.
Network
Group of devices. Devices can be connected
in either wired or wireless mode.
Networks can also differ in range and struc-
ture:
– Range: Local networks (
) or wide-
area networks (
– Structure:
ad-hoc network
Network subscriber
Devices and PCs that are connected to each
other in a network e.g., servers, PCs and
phones.
O
Outbound proxy
Alternative NAT control mechanism to STUN
and ALG.
Outbound proxies are implemented by the
VoIP provider in firewall/NAT environments
as an alternative to
. They
control data traffic through the firewall.
Outbound proxy and STUN servers should
not be used simultaneously.
and
