Siemens Gigaset A580 IP User Manual page 194

Ringback when the number is busy
= CCBS (Completion of Calls to Busy Subscriber). If a caller hears the busy tone,
he or she can activate the ringback function. As soon as the connection is free
the caller is rung back. As soon as the caller lifts the receiver the connection is
made automatically.
S
Server Provides a service to other
cate a computer/PC or an application. A server is addressed via
Domain names
SIP (Session Initiation Protocol)
Signalling 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
£
VoIP
SIP provider
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 net-
work configuration. Unlike a
change.
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,
Segment of a Network.
Subnet
Subnet mask
IP addresses
number. The network number is identical for all
of the network 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.
Symmetric NAT
A symmetric NAT assigns different external IP addresses and port numbers to
the same internal IP addresses and port numbers – depending on the external
target address.
Network subscribers
and Port.
that is used to send and receive SIP signalling data for VoIP.
provider.
Outbound
consist of a fixed network number and a variable subscriber
Dynamic IP address, a static IP address does not
proxy.
Network
(Clients). The term can indi-
IP address/
subscribers. The size
Glossary
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