Yealink SIP-T21 E2 Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
900
Parameters
Permitted Values
Default
features.dtmf.transfer = 123
Note: It works only if the value of the parameter “features.dtmf.replace_tran” is set to 1
(Enabled).
Web User Interface:
Features->General Information->Tran Send DTMF
Phone User Interface:
None
To configure transfer via DTMF via web user interface:
1. Click on Features->General Information.
2. Select the desired value from the pull-down list of DTMF Replace Tran.
3. Enter the specified DTMF digits in the Tran Send DTMF field.
4. Click Confirm to accept the change.
DTMF Send Event Flash
Generally, the IP phones support 16 encoded DTMF signals (0 to 15), represented by the ten
digits, the letters A to D, and the symbols # and *. DTMF send event flash feature allows IP
phones to send Event Flash (DTMF signal 16) by transforming the letter E.
The following table summarizes the DTMF-related named events within the telephone-event
payload format:

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English