> ## Documentation Index
> Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SIP Connections

> Configure SIP connections on Telnyx for inbound and outbound calling. Choose credential, IP, FQDN, or token authentication and apply call routing rules.

Provision SIP trunks, configure inbound/outbound settings such as failover, number format, codecs, encryption and more.