Mitel Communications Director is ranked 11th in IP Telephony & Unified Communications while Polycom ATX doesn't meet the minimum requirements to be ranked in IP Telephony & Unified Communications. Mitel Communications Director is rated 9.0, while Polycom ATX is rated 0.0. The top reviewer of Mitel Communications Director writes "An easy to use product. Numerous applications are available for it". On the other hand, Mitel Communications Director is most compared with , whereas Polycom ATX is most compared with .
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