Auerswald COMpact 3000 analog Operating Manual page 602

Glossary
Terminology and Functions
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location of the gateway may affect any charges associated with the call. This applies especially
to international calls that may be more expensive than simple calls on a public switched
network if the gateway is located domestically.
VPN
A VPN (Virtual Private Network) connects remote or neighboring networks (LAN) to the internal
network using what is called a VPN tunnel. The tunnel functions basically as a channel in which
embedded data is transported from one network to the other.
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Wake-up Functions
To be reminded of one-time or recurring appointments, every user can configure different wake-
up times for his telephone.
WAN
A public network, e.g., the Internet, is also called a WAN (Wide Area Network).
Wideband Sound Quality (G.722)
In the field of telephony, this describes a higher level of speech quality. This level of speech
quality is achieved through the speech codec G.722, which uses a broader frequency spectrum
from 100 to 7000 Hz but only requires 64 kbps of bandwidth. In conventional PSNT telephony,
only a frequency spectrum of 300 to 3400 Hz is used; this also uses 64 kbps.
The best possible sound quality depends on the end device used.
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COMpact 3000 analog/ISDN/VoIP - Firmware V4.0 - Operating Manual V06 12/2020