[Freeswitch-users] Dialplan detect user on call

Hi, I have an issue that is the result of Cisco shortsightedness. The Cisco SPA5xx phones support auto-answer. However, if the user is on the phone, the caller is slammed on hold and the auto-answer picks up. The person on hold is left wondering why they got thrown away with no warning. At a minimum, Cisco should allow you to select which behavior you want. Anyway, how can I detect (in an XML dialplan) if the extension is currently on a call? For those that don't know me, I have limited scripting skills. Can a script be used to detect this and return a value to a dialplan condition? Thanks, Sean