Yealink SIP-T21 E2

Configuring Audio Features
901
Event
encoding (decimal)
0-9
0-9
*
10
#
11
A-D
12-15
Flash
16
The following figure shows the Flash event sent by the IP phone when transmitting DTMF digit
using the RFC 2833 DTMF type:
Procedure
Configuration changes can be performed using the configuration files.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure DTMF send event flash
feature.
Parameter:
features.dtmf.dtmf_flash
Details of Configuration Parameter:
Parameter
Permitted Values
Default
features.dtmf.dtmf_flash
0 or 1
0
Description:
Enables or disables the IP phone to send Event Flash by transforming the letter E.
0-Disabled