Siemens Gigaset A580IP Manual page 183

Glossary
Ringback when the call is not answered
= CCNR (Completion of Calls on No Reply). If a participant does not respond when
called, a caller can arrange an automatic ringback. As soon as the destination
phone has completed a call and is free again, the caller is rung back. This feature
must be supported by the exchange. The ringback request is automatically can-
celed after about 2 hours (depending on the VoIP provider).
S
Server Provides a service to other
computer/PC or an application. A server is addressed via
names and Ports.
SIP (Session Initiation Protocol)
Signaling protocol independent of voice communication. Used for establishing and
ending a call. It is also possible to define parameters for voice transmission.
£
SIP address URI.
SIP port/Local SIP port
(Local) Port
SIP provider
£
VoIP
SIP proxy server
IP address of your VoIP provider's gateway server.
Static IP address
A static IP address is assigned to a network component manually during network
configuration. Unlike a
STUN
Simple Transversal of UDP over NAT
NAT control mechanism.
STUN is a data protocol for VoIP telephones. STUN replaces the private IP address in
the data packets of the VoIP telephone with the public address of the secure private
network. To control data transfer, a STUN server is also required on the Internet.
STUN cannot be implemented with symmetric NATs.
£
ALG, Firewall, NAT,
Subnet Segment of a Network.
Subnet mask
IP addresses
The network number is identical for all
work number part is determined in the subnet mask. In the subnet mask
255.255.255.0, for example, the first three parts of the IP address are the network
number and the last part the subscriber number.
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Network subscribers
that is used to send and receive SIP signaling data for VoIP.
provider.
Dynamic IP
Outbound
consist of a fixed network number and a variable subscriber number.
(Clients). The term can indicate a
address, a static IP address does not change.
proxy.
Network subscribers. The size of the net-
IP addresses/Domain