Yealink SIP-T21 E2 Administrator's Guide

Configuring Audio Features
897
3. Click Confirm to accept the change.
Suppress DTMF Display
Suppress DTMF display allows IP phones to suppress the display of DTMF digits during an
active call. DTMF digits are displayed as “*” on the LCD screen. Suppress DTMF display delay
defines whether to display the DTMF digits for a short period of time before displaying as “*”.
Procedure
Configuration changes can be performed using the following methods.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure suppress DTMF display and
suppress DTMF display delay.
Parameters:
features.dtmf.hide
features.dtmf.hide_delay
Web User Interface
Configure suppress DTMF display and
suppress DTMF display delay.
Navigate to:
http://<phoneIPAddress>/servlet?p=f
eatures-general&q=load
Details of Configuration Parameters:
Parameters
Permitted Values
Default
features.dtmf.hide
0 or 1
0
Description:
Enables or disables the IP phone to suppress the display of DTMF digits during an active
call.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), the DTMF digits are displayed as asterisks.
Web User Interface:
Features->General Information->Suppress DTMF Display
Phone User Interface:
None
features.dtmf.hide_delay
0 or 1
0

Yealink SIP-T21 E2 Specifications

General

Lines	2
SIP Accounts	2
Power over Ethernet	Yes (IEEE 802.3af)
Wall Mountable	Yes
HD Voice	Yes
Operating Humidity	10% to 90% (non-condensing)
Network Ports	2 x 10/100 Mbps Ethernet ports
Audio Codecs	G.711, G.722, G.726, G.729, iLBC
Protocols Supported	SIP
Headset Port	RJ9
Power Supply	AC 100-240V input, DC 5V/1A output
Operating Temperature	0 to 40°C
Certifications	CE, FCC, RoHS