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Glossary – Siemens GIGASET C475 IP User Manual

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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

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