Auerswald COMpact 3000 analog Operating Manual page 583

Glossary
Terminology and Functions
D
D
D-Channel
Control information, such as telephone numbers, units, services, etc. is transmitted on the D-
channel, the signaling channel for the ISDN.
DDI
The DDI (Direct Dialling In) is the extension number for dialling directly to a specific subscriber
on a telephone system. Example: In the number 0 53 06 / 92 00 - 700, 700 is the extension
(DDI) for the Auerswald info-line.
DHCP
DHCP (Dynamic Host Configuration Protocol) is a client/server protocol for dynamically
allocating IP addresses and network parameters. The IP addresses are requested by the
DHCP clients (PCs in the network) on the DHCP server (for example, a router or the Internet
service provider). The DHCP server takes these IP addresses from a set address pool and
sends them to the client. In addition, the client receives additional information (for example, the
addresses for the standard gateway and DNS server).
The IP address is temporarily allocated for a certain amount of time. If the address is no longer
required by the client, the server has access to it again and can allocate it to another client.
DiffServ
The Differentiated Services Flag (DiffServ) is evaluated by active network components such as
routers or switches in networks in order to forward packets according to their priority. This is
necessary, for example, to give voice packets (VoIP) priority and to achieve better voice quality.
Direct Exchange Line Access
If the telephone has been configured as a direct exchange access point on the PBX, you will
hear an external dial tone directly after picking up the receiver. You can directly dial the
telephone number without the leading 0.
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COMpact 3000 analog/ISDN/VoIP - Firmware V4.0 - Operating Manual V06 12/2020