ZyXEL Communications 2002 Series - Manual (Page 19)

Prestige 2002 Series User’s Guide
Chapter 1 Introducing the Prestige 19
Voice Activity Detection/Silence Suppression
Voice Activity Detection (VAD) reduces the bandwidth that a call uses by not transmitting
“silent packets” when you are not speaking.
Comfort Noise Generation
When the Prestige uses VAD, it generates and sends comfort (background) noise when you are
not speaking.
Echo Cancellation
The Prestige supports G.168, an ITU-T standard for eliminating the echo caused by the sound
of your voice reverberating in the telephone receiver while you talk.
QoS (Quality of Service)
Quality of Service (QoS) mechanisms help to provide better service on a per-flow basis. The
Prestige supports Type of Service (ToS) and Differentiated Services (DiffServ). This allows
the Prestige to tag voice frames so they can be prioritized over the network.
Fax Tone Detection and Pass-through
The Prestige automatically detects fax messages and sends them over PCM G.711.
Auto-provisioning
Auto-provisioning automatically updates your Prestige’s configurable settings via a TFTP
server.
Firmware Upgrades
Use the web configurator to upload updated firmware to your Prestige.
Ease of Installation
Your Prestige is designed for quick, intuitive and easy installation. Physically, its compact size
and lightness make it easy to position anywhere in your busy office.
1.4 Applications
Here are some examples of how you can use your Prestige.
1.4.1 Make Calls via Internet Telephony Service Provider
In a home or small office environment, you can use the Prestige to make and receive VoIP
telephone calls through an Internet Telephony Service Provider (ITSP).