My ringtones.xml was missing
<tone name="intercom" type="intercom">
<vendor ua="Polycom.*">Auto Answer</vendor>
<vendor ua="Cisco-.*" type="call-info">auto-answer=0</vendor>
<vendor ua="optiPoint .*" type="call-info">auto-answer=0</vendor>
<vendor ua="snom.*" type="call-info"><{from-uri}>;answer-after=0</vendor>
<vendor ua="Linksys.*" type="call-info"><{from-uri}>;answer-after=0</vendor>
<vendor ua="Aastra.*" type="call-info"><{from-uri}>;answer-after=0</vendor>
<vendor type="answer-mode">Auto</vendor>
</tone>
Thanks for your help, I'm just getting started, again, evaluating snom One.