The UCX server supports 5 different Telephony Trunk technologies and one Custom Telephony Trunk type. As part of the planning process you will need to identify the types of trunks that will be used for calls external to the UCX system and the number of trunks required that will support the expected inbound and outbound call volumes. Trunk Traffic Engineering is beyond the scope of this document.

Each provider is different and requires different configuration settings. It is recommended that you use the IP Trunk Assistant page to configure the known SIP trunk providers. The list continues to be updated as new providers are added.

For other SIP trunk providers, please refer to the SIP Trunk Configuration Checklist.