If you're looking for a doc there is none.
The proof is that the possible actions you can use with a call are listed under the softkey layout per call state. If they're not listed there, how could you possible configure them?? You do not get the transfer option for ring in.
If that's not good enough, then explain them how transfer works in Cisco.
You put a call on hold and then start a new one..., how can you put a call on hold when you haven't even answered it??
Get in touch with your Account Manager and he'll help you out if you want to submit a PER.
HTH
java
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www.cisco.com/go/pdihelpdesk
HTH
java
if this helps, please rate