asterisk users - Apr 2007 - 7970 Config Question

Anyone knows what the XML tag is for the 7970 to enable:

Display On When Incoming Call

So far I have set up these settings:

<daysDisplayNotActive>1,7</daysDisplayNotActive>
<displayOnTime>09:00</displayOnTime>
<displayOnDuration>8:30</displayOnDuration>
<displayIdleTimeout>00:01</displayIdleTimeout>


but they don't seem to affect that other setting at all.

any ideas ?