Possible NOT to turn backlight on on XML message

[GeorgSchwarz]

Hi!

We intend to send status messgaes to our phones - mainly T26/T28s

Works like a charm.
Sometimes our software makes a "fail-safe" update just to make sure the settings are still on the display.

Is there a way to tell the phone that it should NOT turn on the Backlight in this case?

I've read through Yealink_SIP-T4X_IP_Phones_XML_Browser_Developer's_Guide_V71_150.pdf
and found no option.

Maybe this can be achieved using some other setting?

Best,
George