McDewey

© 2020 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 50 Network Topology Figure 1 Network Topology • The network topology includes the Cisco UCM Cluster, Unity Voicemail system and 2 Cisco Endpoints. Cisco UCM has a trunk configured to Cisco UBE’s Virtual IP Address. Sparklight 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 Unified Border Element and Cisco UCM is TCP and to Sparklight 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 Sparklight IP UDP with RTP Voice Mail Support YES Session Refresh YES Early Media support with PRACK YES