Yealink SIP-T21 E2

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
890
Navigate to:
http://<phoneIPAddress>/servlet?m=
mod_data&p=settings-voice&q=load
Details of Configuration Parameter:
Parameter
Permitted Values
Default
voice.ans_nb.enable
0 or 1
0
Description:
Enables or disables the Smart Noise Block feature on the IP phones.
0-Disabled
1-Enabled
Note: It works only if the value of the parameter “voice.tns.enable” is set to 1 (Enabled). It
is only applicable to CP920 IP phones.
Web User Interface:
Settings->Voice->Noise Proof->Smart Noise Block.
Phone User Interface:
None
To configure Smart Noise Block via web user interface:
1. Click on Settings->Voice.
2. Select the desired value from the pull-down list of Smart Noise Block.
3. Click Confirm to accept the change.
DTMF
DTMF (Dual Tone Multi-frequency), better known as touch-tone, is used for telecommunication