Cisco VoIP PBX is ranked 2nd in IP PBX while Yeastar K2 is ranked 4th in IP PBX. Cisco VoIP PBX is rated 8.0, while Yeastar K2 is rated 0.0. The top reviewer of Cisco VoIP PBX writes "Provides support for help/service desk to be knowledgeable about all eGov infrastructure". On the other hand, Cisco VoIP PBX is most compared with 3CX Live Chat and Yeastar S-Series VoIP PBX, whereas Yeastar K2 is most compared with 3CX Live Chat.
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