ZyXEL Communications P-2302HWUDL-P1 Guía de usuario descargar pdf (Pagina 147)

P-2302HWUDL-P1 Series User’s Guide

147

CHAPTER 10

Phone

The following sections describe how to configure the ZyXEL Device to work with analog

phones and how to configure the ZyXEL Device’s built in DECT base station to work with

DECT phones.

10.1 Analog Phone Overview

You can configure the volume, echo cancellation and VAD settings for each individual phone

port on the ZyXEL Device. You can also select which SIP account to use for making outgoing

calls.

10.1.1 Voice Activity Detection/Silence Suppression/Comfort Noise

Voice Activity Detection (VAD) detects whether or not speech is present. This lets the ZyXEL

Device reduce the bandwidth that a call uses by not transmitting “silent packets” when you are

not speaking.

When using VAD, the ZyXEL Device generates comfort noise when the other party is not

speaking. The comfort noise lets you know that the line is still connected as total silence could

easily be mistaken for a lost connection.

10.1.2 Echo Cancellation

G.168 is an ITU-T standard for eliminating the echo caused by the sound of your voice

reverberating in the telephone receiver while you talk.

10.1.3 Supplementary Phone Services Overview

Supplementary services such as call hold, call waiting, call transfer, … are generally available

from your VoIP service provider. The ZyXEL Device supports the following services:

• Call Hold

• Call Waiting

• Making a Second Call

• Call Transfer

• Call Forwarding

• Three-Way Conference

• Internal Calls

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ZyXEL Communications P-2302HWUDL-P1 Guía de usuario Pagina 147