Integration of Exchange Online UM with Cisco CUCM

Customer: University

University have a Cisco IP telephony estate and wanted to leverage their investment in Office 365 for voicemail services using Exchange Online. As direct connectivity between Cisco and Exchange Online is not supported, I deployed two Sonus Session Border Controllers with failover routing in between Cisco and Exchange Online.

  • Sonus Session Border Controller installation
  • Sonus Session Border Controller configuration including SIP, TLS, Transformation Rules
  • Integration with Cisco CUCM for voicemail
  • Exchange Online UM configuration