Siemens GIGASET C475 IP - Manual (Page 190)

189
Glossary
Gigaset C470-475 IP / EN for IM-Ost / A31008-xxxx-xxxx-x-xxxx / glossary.fm / 18.12.07
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Glossary
A
ADSL
Asymmetric Digital Subscriber Line
Special form of DSL.
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 connec-
tion 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: Firewall, NAT, Outbound proxy, STUN.
Authentication
Restriction of access to a network/service by use of an ID and password to log in.
Automatic ringback
See Ringback when the number is busy.
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
See DSL.
Buddy
Subscriber with whom you exchange brief messages on the Internet in real time (chat-
ting).
See also: Instant messaging.
C
Call waiting
CW
VoIP provider feature. A beep during a call indicates that another caller is waiting. You
can accept or reject the second call. You can activate/deactivate the feature.
Call forwarding
CF
Automatic forwarding of a call to a different telephone number. There are three kinds
of call forwarding:
– CFU, Call Forwarding Unconditional
– CFB, Call Forwarding Busy
– CFNR, Call Forwarding No Reply