The reference architecture in this document provides an end-to-end design for the BYoPSTN option. This architecture is validated by Cisco and uses Cisco Unified Border Element (CUBE) as the Session Border Controller (SBC) for call traffic between BroadWorks and Webex Meetings.

For details, see: Bring Your Own PSTN Solution Guide for Webex for Cisco BroadWorks (Last updated: March 08, 2022)