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Glossary
Gigaset S675 IP / IM-NORD EN / A31008-M1915-R201-1-PG19 / glossary.fm / 6.8.07
Ve
rs
ion 4,
16
.09.
2005
Glossary
A
ADSL
Asymmetric Digital Subscriber Line
Special form of
.
ALG
Application Layer Gateway
NAT control mechanism of a router.
Many routers with integrated NAT use
ALG. ALG lets the data packets in a VoIP
connection pass and adds the public IP
address of the secure private network.
The router's ALG should be deactivated
if the VoIP provider offers a STUN server
or an outbound proxy.
See also:
.
Authentication
Restriction of access to a network/serv-
ice by use of an ID and password to log
in.
Automatic ringback
.
B
Block dialling
Enter the complete phone number, and
correct it if necessary. Then pick up the
receiver or press the handsfree key to
dial the phone number.
Broadband Internet access
Buddy
Party with whom you exchange brief
messages on the Internet in real time
(chatting).
See also:
.
C
Call forwarding
CF
Automatic forwarding of a call to a dif-
ferent telephone number. There are
three kinds of call forwarding:
– CFU, Call Forwarding Unconditional
– CFB, Call Forwarding Busy
– CFNR, Call Forwarding No Reply
Call waiting
CW
VoIP provider feature. A beep during a
call indicates that another caller is wait-
ing. You can accept or reject the second
call. You can activate/deactivate the
feature.
Chatting
Form of communication on the Inter-
net. During a chat, brief messages are
exchanged between the communicat-
ing parties in real time. Chatting in this
sense is understood to be a written
form of communication.
Client
Application that requests a service
from a server.
Codec
Coder/decoder
Codec is a procedure that digitises and
compresses analogue voice before it is
sent via the Internet and decodes – i.e.
translates into analogue voice – digital
data when voice packets are received.
There are different codecs, with differ-
ing degrees of compression, for
instance.
Both parties involved in the telephone
connection (caller/sender and recipi-
ent) must use the same codec. This is
negotiated between the sender and the
recipient when establishing a connec-
tion.