Aastra Clearspan is ranked 25th in Unified Communications while Avaya one-X [EOL] doesn't meet the minimum requirements to be ranked in Unified Communications. Aastra Clearspan is rated 0.0, while Avaya one-X [EOL] is rated 8.0. On the other hand, the top reviewer of Avaya one-X [EOL] writes "Allows users to be on the move and still provide them with the ability to answer their desk phone". Aastra Clearspan is most compared with , whereas Avaya one-X [EOL] is most compared with Toshiba IPedge.
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