Digium Asterisk is ranked 4th in Unified Communications while Siemens OpenScape is ranked 9th in Unified Communications. Digium Asterisk is rated 0.0, while Siemens OpenScape is rated 0.0. On the other hand, Digium Asterisk is most compared with Kamailio SIP Server, 3CX Live Chat, Cisco Jabber and Cisco Unified Communications, whereas Siemens OpenScape is most compared with 3CX Live Chat, Cisco Unified Communications, Cisco UCM, Mitel Application Suite and Cisco Jabber.
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