What are the several options listed in user preferences means?

Hi ,

What these param actually implies in the userpreferences.xml.

UserPreference xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <AutoPresence>true</AutoPresence>

  <RingPCAndHeadset>false</RingPCAndHeadset>

  <KeepLinkUp>false</KeepLinkUp>

  <IncomingCall>Pause</IncomingCall>

  <CallEnded>Play</CallEnded>

  <DONAction>DoNothing</DONAction>

  <DOFFAction>DoNothing</DOFFAction>

  <DefaultSoftPhone />

  <ETVSoftphone />

  <FileOrigin Component="Spokes" Applied="true" />

</UserPreference>

Does we can change these entries manually.

thanks

Meenakshi