Yealink SIP-T54S Administrator's Manual page 861

phones:
Australia

Austria

Brazil

Belgium

China

Czech

Denmark

Finland

France

Germany

Great Britain

Greece

Hungary

Lithuania

India

Italy

Japan

Mexico

New Zealand

Netherlands

Norway

Portugal

Spain

Switzerland

Sweden

Russia

United States

Chile

Czech ETSI

Configured tones can be heard on IP phones for the following conditions.
Condition
Dial
Secondary Dial
Description
When in the dialing interface
When adding a comma "," to the digit map (For
more information on digit map, refer to
using Digit Map String Rules)
Configuring Audio Features
Dial Plan
835