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Glossary
Gigaset DL500A analog / IM-NORD EN / A31008-N3103-R201-2-7619 / Glossary.fm / 20.01.11
Version 4, 16.09.2005
DynDNS
Dynamic DNS
Domain names and IP addresses are
assigned via DNS. For Dynamic IP addresses
this service is enhanced with "Dynamic
DNS". This permits the use of a network com-
ponent with a dynamic IP address as a
Server on the Internet. DynDNS ensures
that a service can always be addressed on
the Internet under the same Domain name,
regardless of the current IP address.
E
ECT
Explicit Call Transfer
Participant A calls participant B. The partici-
pant puts the connection on hold and calls
participant C. Rather than connect everyone
in a three-party conference, A now transfers
participant B to C and hangs up.
EEPROM
Electrically Eraseable Programmable Read Only
Memory
Memory building block in your phone with
fixed data (e.g., default and customised set-
tings) and data saved automatically (e.g., call
list entries).
Ethernet network
Wired LAN.
F
Firewall
You can use a firewall to protect your net-
work against unauthorised external access.
This involves combining various measures
and technologies (hardware and/or soft-
ware) to control the flow of data between a
private network you wish to protect and an
unprotected network (e.g., the Internet).
See also: NAT.
Firmware
Device software in which basic information
is saved for the functioning of a device. To
correct errors or update the device software,
a new version of the firmware can be loaded
into the device's memory (firmware update).
Fixed IP address
A fixed IP address is assigned to a network
component manually during network con-
figuration. Unlike the Dynamic IP address, a
fixed IP address does not change.
Flat rate
Billing system for an Internet connection.
The Internet provider charges a set monthly
fee. There are no additional charges for the
duration of the connection or number of
connections.
Full duplex
Data transmission is a mode in which data
can be sent and received at the same time.
G
G.711 a law, G.711 μ law
Standard for a Codec.
G.711 delivers a very good voice quality that
corresponds to that in the ISDN network. As
there is little compression, the necessary
bandwidth is around 64 kbit/s per voice con-
nection, but the delay caused by coding/
decoding is only approx. 0.125 ms.
"a law" describes the European standard and
"μ law" describes the North American/Japa-
nese equivalent.
G.722
Standard for a Codec.
G.722 is a broadband language codec with a
bandwidth of 50 Hz to 7 kHz, a net transmis-
sion rate of 64 kbit/s per voice connection
and integrated speech pause recognition
and comfort noise generation (silence sup-
pression).
G.722 delivers very good voice quality. A
higher sampling rate provides clearer and
better voice quality than with other codecs
and enables a speech tone in High Definition
Sound Performance (HDSP).
G.726
Standard for a Codec.
G.726 delivers a good voice quality. It is infe-
rior to the quality with codec G.711 but bet-
ter than with G.729.
