Using Enhanced DSS Keys on Yealink IP Phones 
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Using Enhanced DSS Keys on Yealink IP Phones 
This guide provides detailed information for system administrators on how to set up enhanced 
DSS keys (EDK) on Yealink IP phones. 
The features introduced in this guide apply to Yealink SIP-T54S, SIP-T52S, SIP-T48G/S, 
SIP-T46G/S, SIP-T42G/S, SIP-T41P/S, SIP-T40P, SIP-T40G, SIP-T29G, SIP-T27P/G, SIP-T23P/G, 
SIP-T21(P) E2, SIP-T19(P) E2 and CP860 IP phones running firmware version 81 or later. 
Introduction 
Enhanced DSS Keys (EDK) enables users to customize the functions of a phone’s DSS keys (line 
keys, programmable keys and ext keys) and assign functions to custom soft keys. You can use 
EDK to assign frequently-used function to DSS keys and custom soft keys or to create menu 
shortcuts to frequently-used phone settings as needed. 
The following shows the line keys and soft keys on SIP-T46G IP phones: 
 
Note 
Application scenarios involve the following: 
  Adding new DSS keys or soft keys to simplify the operation of common telephony tasks 
that may need more than one key press with the default configuration. 
  Removing certain default DSS keys or soft keys for the functions that may be redundant 
or never used. 
EDK provides a method of creating interactive macro call sequences that can be executed by the 
The line keys are not applicable to SIP-T19(P) E2/CP860 IP phones. The ext keys are only 
applicable to SIP-T54S/T52S/T48G/T48S/T46G/T46S/T29G/T27P/T27G IP phones. And to 
customize the functions for ext keys, you have to connect the expansion module to the IP phone 
in advance.