Aastra 5000 is ranked 24th in Unified Communications while Siemens OpenScape is ranked 9th in Unified Communications. Aastra 5000 is rated 0.0, while Siemens OpenScape is rated 0.0. On the other hand, Aastra 5000 is most compared with , whereas Siemens OpenScape is most compared with 3CX Live Chat, Cisco Unified Communications, Cisco UCM, Digium Asterisk and Alcatel-Lucent OpenTouch.
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