Specifications

About This Guide
1
XML browser simply means that the SIP phones’ LCD screen display can be managed
by external applications.
This Developers’ Guide shows you how to use XML API to control the LCD screen
display of Yealink IP phones as well as its configuration. The XML API is intended to
provide you with flexibility in developing applications on the phones while tightly
integrating into the phone’s telephony capabilities and functions.
This guide is intended for Yealink SIP-T4X IP phones with firmware version 71or later.
This guide is designed specifically to provide development engineers, system
administrators, or network engineers with information for developing and deploying
customized client services to Yealink SIP-T4X IP phones via using the XML browser
feature.
This guide is not intended for end users and does not provide user-level information on
how to use any specific XML applications.
Before reading this guide, you should be familiar with the following:
 Basic text editors, or full IDE-like Eclipse or Microsoft Visual Studio for creating or
writing code.
 General application and software development.
 Adequate planning, creating, and testing resources needed to produce a fully
deployable Web-based application.
 Yealink T4X IP phones and provisioning methods.
 How to use an XML editor.
 The XML-based schema and syntax.
This section describes the changes to this guide for each release and guide version.
Major updates have occurred to the following sections:
 Yealink IP Phone XML Objects on page 9.