Yealink SIP-T2xP Auto Provisioning Manual page 195

Parameter
features.dtmf.hide =
features.dtmf.hide_delay =
(not applicable to SIP-T20P IP phones)
features.dtmf.repetition =
features.dtmf.replace_tran =
Permitted Values
automatically.
The default value of delay time is 4.
It enables or disables the phone to suppress
the display of DTMF digits.
0-Disabled
0 or 1
1-Enabled
The default value is 0.
It enables or disables the phone to display
the DTMF digits for a short period before
displaying as asterisks when the parameter
"features.dtmf.hide" is set to 1 (Enabled).
0 or 1
0-Disabled
1-Enabled
The default value is 0.
It configures the repetition times for sending
the DTMF packets.
1, 2 or 3
The default value is 3.
It enables or disables the phone to send
0 or 1
DTMF sequences for transfer function when
pressing the transfer soft key or the TRAN
Descriptions
Features->General
Information->Suppress DTMF Display
Features->General
Information->Suppress DTMF Display
Delay
Features->General
Information->DTMF Repetition
Features->General
Information->DTMF Replace Tran
Appendix
Web Setting Path
185