User guide

Simply IP Phone Trouble Shooting
- 26 -
2) In the “Expansion” filed, enter the specific number.
3) Press Confirm button to save the changes.
Tone Settings
You can define the frequency and time period of all the following tones：
 Dial
 Ring Back
 Busy
 Congestion
 Call Waiting
 Dial Recall
 Record
 Info
 Stutter
 Message
 Auto Answer
To edit the tone filed via Web interface:
1) Choose Phone->Tones.
2) Enter the frequency and time period(in ms) as the following format:
Frequency /Time Period (for example 400/200).
3) Press Confirm button to save the changes, or Cancel to cancel the changes.
Note:
1. Please contact your system administrator for more information about the
frequency and time period parameters. You can enter up to 8 groups for each tone.
2. If the frequency is set as 0, it means silence.
Voice
To edit the Voice filed via Web interface:
1）Choose Phone->Voice.
2) Set the following parameters shown in the table.
Parameter Description
Echo canceller Defines whether to enable the echo canceller.
VAD Voice activity detection (VAD), also known as speech activity
detection or speech detection, is a technique used in speech
processing in which the presence or absence of human speech is
detected.
CNG A comfort noise generator (CNG) is a program used to generate