asterisk users - Nov 2010 - Polycom dial w/o "Dial", while on-hook?

I've had phones before where, with the phone on-hook, it still implements
the local dialplan.  E.g., if I dialed "0" (on-hook), after three
seconds,
it would dial the operator, and have the call on speakerphone.  Does
Polycom allow this functionality?  Clearly, not a necessary feature... but
it would be a nice one.

Thanks!

-Ken


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