Glossary

Music on hold

Music that is played while you are Consultation call or Toggling. The waiting participant hears music while on hold.

N

NAT

Network Address Translation

Method for converting (private)

IP addresses to one or more (public) IP addresses. NAT enables the

IP addresses of Network subscribers (e.g. VoIP telephones) in a LAN to be concealed behind a shared IP address for the Router on the Internet.

VoIP telephones behind a NAT router cannot be reached by VoIP servers (on account of the private IP address). In order to "get around" NAT, it is possible to use (alternatively) ALG in the router, STUN in the VoIP telephone, or for the VoIP provider to use an Outbound proxy.

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 networkNetwork subscribers

Devices and computers 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 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 in order to access a protected area.

You can protect your base station configuration data with a system PIN (4-digit number combination).

Port

Data is exchanged between two applications in a Network via a port.

Port forwarding

The Internet gateway (e.g. your router) forwards data packets from the Inter- net 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 subscribers. 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 uniquely identifies the recipient or sender of a data packet within a network.

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