Yealink SIP VP-T49G, Developer'S Manual

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XML and Yealink IP Phones
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The XML browser feature on Yealink IP phones allows users to develop and deploy
custom services which meet user functional requirements on the server. Users can
customize practical applications, such as weather report, stock information, Google
search, news service, etc.
Phone service developers should take it into consideration that the phone is not a web
browser so it cannot parse HTML. Although the content is delivered to the phone
through HTTP messages using a web server, keep in mind that the content is not HTML.
All content comes to the IP phone either as plain text or text packaged in XML objects.
Yealink IP phones support 10 proprietary XML objects, which allow the creation of
powerful XML applications.
There are 2 types of XML objects:
UI objects: XML objects are used to control the LCD screen display of IP phones.
Non UI objects: XML objects have no direct impact on the current LCD screen display
of IP phones.
The supported objects are:

TextMenu object (UI)

TextScreen object (UI)

InputScreen object (UI)

Directory object (UI)

ImageScreen object (UI)

ImageMenu object (UI)

FormattedTextScreen object (UI)

Status object (UI)

Execute object (Non UI)

Configuration object (Non UI)