P-2302R Series User’s Guide

Voice Coding

The Prestige can use the following voice codecs (coder/decoders).

•G.711

•G.729

Voice Activity Detection/Silence Suppression

Voice Activity Detection (VAD) reduces the bandwidth that a call uses by not transmitting when you are not speaking.

Comfort Noise Generation

The Prestige generates background noise to fill moments of silence when the other device in a call stops transmitting because the other party is not speaking (as total silence could easily be mistaken for a lost connection).

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 or T.38.

Auto-provisioning

Your voice service provider can automatically update your Prestige’s configuration via an auto-provisioning server.

Auto Firmware Upgrade

The Prestige gives you the option to upgrade to a newer firmware version if it finds one during auto-provisioning. Your voice service provider must have an auto-provisioning server and a server set up with firmware in order for this feature to work.

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Chapter 1 Introducing the Prestige