Gigaset DE310 IP PRO / en / A31008-M2218-L101-5-7619 / glossary.fm / 27.09.2012
PRO Version 3, 30.05.2012
133
Glossary
VoIP telephones behind a NAT router cannot be reached by VoIP servers (on account of the
private IP address). To "bypass" NAT it is possible to either use ALG in the router, STUN in
the VoIP telephone or an outbound proxy for the VoIP provider.
If an outbound proxy is made available you must allow for this in the VoIP settings for your
phone.
Network
Group of devices. Devices can be connected in either wired or wireless mode.
Networks can also differ in range and structure:
– Range: Local networks (LAN) or wide-area networks (WAN)
– Structure: Infrastructure network or ad hoc network
Network subscriber
Devices and PCs that are connected to each other in a network, e.g., servers, PCs and
phones.
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 a SIP proxy server. They control data traffic through the firewall.
Outbound proxy and STUN servers should not be used simultaneously.
See also: STUN and NAT.
P
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.
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 to the
port that the data is intended for. 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 else it is newly assigned with each
access.
The combination of IP address/port number identifies the recipient or sender of a data
packet within a network.
Prepare dialling
See Block dialling.
Private IP address
See Public IP address.
