Mitel Application Suite is ranked 11th in Unified Communications while Siemens OpenScape is ranked 9th in Unified Communications. Mitel Application Suite is rated 0.0, while Siemens OpenScape is rated 0.0. On the other hand, Mitel Application Suite is most compared with Fortinet FortiVoice and Cisco Unified Communications, whereas Siemens OpenScape is most compared with Cisco Unified Communications, 3CX Live Chat and Kamailio SIP Server.
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