Gigaset C530 IP Owner's Manual page 149

Glossary
O
Outbound Proxy
Alternative NAT control mechanism to STUN and ALG.
Outbound proxies are implemented by the VoIP provider in firewall/NAT environments as an
alternative to SIP proxy servers. They control data traffic through the firewall.
Outbound proxy and STUN servers should not be used simultaneously.
See also: STUN and NAT.
P
Paging (handset search)
(German: Funkruf )
Base function for locating the registered handsets. The base establishes a connection to
every registered handset. The handsets start to ring.
PIN
Personal Identification Number
Protects against unauthorised use. When the PIN is activated, a number combination has to
be entered to access a protected area.
You can protect your base configuration data with a system PIN (4-digit number
combination).
Port
Data is exchanged between two applications in a Network across a port.
Port forwarding
The Internet gateway (e.g. your router) forwards data packets from the Internet that are
directed to a certain Port to the port concerned. This allows servers in the LAN to offer
services on the Internet without you needing a public IP address.
Port number
Indicates a specific application of a Network subscriber. Depending on the setting in the
LAN, the port number is permanently assigned or it is assigned with each access.
The combination of IP address/Port number uniquely identifies the recipient or sender of a
data packet within a network.
Pre-dialling
See Block dialling.
Private IP address
See Public IP address.
Protocol
Describes the agreements for communicating within a Network. It contains rules for
opening, administering and closing a connection, about data formats, time frames and
possible error handling.
Proxy/Proxy server
Computer program that controls the exchange of data between Client and Server in
computer networks. If the phone sends a query to the VoIP server, the proxy acts as a server
towards the phone and as a client towards the server. A proxy is addressed via IP address/
Domain Names and Port.
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