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03-08-2013 01:21 PM
welcome to the Polycom Community. I have moved your post to the correct section.
It depends how you are dialing. Off hook or on hook.
The communitys VoIP FAQ contains this post here:
Oct 7, 2011 Question: Phone unable to Dial a number when Off Hook or on 2nd Call in a Conference
Resolution: Please check => here <=
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Polycom Global Services
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