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Glossary
Gigaset DE900 IP PRO / en / A31008-M2210-R101-5-7619 / glossary.fm / 17.09.2012
PRO Version 3, 30.05.2012
The choice of codec is a compromise between voice quality, transmission speed and the
necessary bandwidth. A high level of compression, for example, means that the band-
width required for each voice connection is low. However, it also means that the time
needed to compress/decompress the data is greater, which increases execution time for
data in the network and thus impairs voice quality. The time required increases the delay
between the sender speaking and the recipient hearing what has been said.
COLP/COLR
Connected Line Identification Presentation/Restriction
Feature provided by a VoIP connection for outgoing calls.
COLP displays the phone number accepting the call on the calling party's display unit.
The number of the party accepting the call is different to the dialled number, e.g., if the call
is diverted or transferred.
The called party can use COLR (Connected Line Identification Restriction) to prevent the
number from appearing on the calling party's display.
Consultation call
You are on a call. With a consultation call, you interrupt the conversation briefly to estab-
lish a second connection to another participant. If you end the connection to this partici-
pant immediately, then this was a consultation call. If you switch to and fro between the
first and second participants, it is called call swapping.
CW
Call waiting
See Call waiting.
D
DHCP
Dynamic Host Configuration Protocol
Internet protocol that regulates the automatic assignment of IP addresses to network
subscribers. The protocol is made available in the network by a server. A DHCP server can,
for example, be a router.
The phone contains a DHCP client. A router that contains a DHCP server can assign the IP
addresses for the phone automatically from a defined address block. This dynamic assign-
ment means that several network subscribers can share one IP address, although they use
it alternately and not simultaneously.
With some routers you can specify that the IP address for the phone is never changed.
Displayed name
VoIP provider feature. You can specify any name that is to be shown to the other party dur-
ing a call instead of your phone number.
DMZ (Demilitarised Zone)
DMZ describes a part of a network that is outside the firewall.
A DMZ is set up, as it were, between a network you want to protect (e.g., a LAN) and a non-
secure network (e.g., the Internet). A DMZ permits unrestricted access from the Internet to
only one or a few network components, while the other network components remain
secure behind the firewall.
