> For the complete documentation index, see [llms.txt](https://docs.cebodtelecom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cebodtelecom.com/microsoft-teams-integration/direct-routing-user-guide/voice-activation-and-setup/8.-on-premises-pstn-connectivity.md). # 8. On-premises PSTN Connectivity #### Assigning a phone number to On-premises PSTN Connectivity Under Users, click Account tab, select Edit and select Phone number type "Direct Routing", Assigned phone number “1999999999” and Phone number extension (if any), and then click Apply.