Glossary - Siemens Gigaset CE450 IP R User Manual

CE 450 IP R / IM-Ost english / A31008-M1817-R601_1-7619 / glossary.fm / 02.03.2007

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
Broadband Internet access
See DSL.
C
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
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.
CAT5 cable
Network cables in the category "CAT-5 cable" are nowadays the most-used base stations
that are being installed. They are used for signal transmission with high data transfer
rates. The specific standard description is EIA/TIA-568. Cat-5 cables are intended for
operating frequencies of up to 100 MHz.
CF
Call Forwarding
See Call forwarding.
Client
Application that requests a service from a server.
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