Gigaset N300 A IP, User Manual

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179
Glossary
Gigaset N300/N300A IP / GBR / A31008-M2214-L101-2-7619 / Glossary.fm / 16.07.13
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DSLAM
Digital Subscriber Line Access Multiplexer
The DSLAM is a switch cabinet in an
exchange at which all subscriber connectors
converge.
DTMF
Dual Tone Multi-Frequency
Another description for dual tone multi-
frequency dialling (DTMF).
Dynamic IP address
A dynamic IP address is assigned to a net-
work component automatically via
DHCP .
The dynamic IP address for a network com-
ponent can change every time it registers or
at certain time intervals.
See also: Fixed IP address
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.
Fragmentation
Data packets that are too big are split into
smaller packets (fragments) before they are
transferred. They are put together again
when they reach the recipient (defrag-
mented).
Full duplex
Data transmission mode in which data can
be sent and received at the same time.