McDewey

© 2018 Cisco Systems, Inc. All rights reserved. Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com Page 5 of 48 Network Topology Figure 1 Network Topology  The network topology includes the Cisco UCM Cluster, Unity Voicemail system, Cisco Fax gateway and 2 Cisco Endpoints. Cisco UCM has a trunk configured to Cisco UBE’s Virtual IP Address. CableOne was used as the service provider with SIP trunk to the Cisco UBE using the WAN Virtual IP Address.  2 Cisco Unified Border Elements are used here for High Availability.  SIP Trunk transport type used between Cisco UBE and Cisco UCM is TCP and to CableOne is UDP. Cisco UCM and Cisco UBE Settings: Setting Value Transport from Cisco UBE to Cisco UCM TCP with RTP Transport from Cisco UBE to CableOne UDP with RTP Voice Mail Support YES Session Refresh YES