elmeg IP140 / en / elmeg140_v1 / glossary.fm / 09.04.2014
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Glossary
DSL
Digital Subscriber Line
Data transfer technology which allows Internet access over conventional phone lines. Pre-
requisites: DSL modem and the appropriate service offered by the Internet provider.
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 network component automatically via
DHCP
. The
dynamic IP address for a network component can change every time it registers or at certain
time intervals.
See also:
Fixed IP address
.
DynDNS
Dynamic DNS
DNS
is used to assign domain names and IP addresses. For
dynamic IP addresses
this service
is now enhanced with Dynamic DNS. This permits the use of a network component 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 participant puts the connection on hold and calls par-
ticipant C. Rather than connect everyone in a three-party conference, A now transfers partic-
ipant B to C and hangs up.
EEPROM
Electrically Erasable Programmable Read-Only Memory
Memory building block in your phone with fixed data (e.g., default and customised settings)
and data saved automatically (e.g., call list entries).
Encryption
Encryption protects confidential information against unauthorised access. With an encryption system,
data packets can be sent securely over a network.
Ethernet network
Wired
LAN
.
Ethernet uses a base band cable for data transmission with a transmission rate of 10 or 100
Mbps or 1 Gbps.
