> For the complete documentation index, see [llms.txt](https://support.portsip.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.portsip.com/portsip-communications-solution/configuring-sip-trunks/voxtelesys-sip-trunk.md).

# Voxtelesys SIP Trunk

[Voxtelesys ](https://voxtelesys.com/sip-trunking)offers secure, Reliable, and cost-effective SIP solutions tailored to industry needs.

PortSIP PBX integrates with [Voxtelesys SIP Trunking](https://voxtelesys.com/sip-trunking) to support voice calls and SMS/MMS messaging, enabling a simple and efficient deployment for modern business communications.

This article covers the following topics:

* [Purchase a DID on Voxtelesys Platform](/portsip-communications-solution/configuring-sip-trunks/voxtelesys-sip-trunk/purchase-a-did-on-questblue-platform.md)
* [Configuring Voxtelesys IP Authentication Trunk](/portsip-communications-solution/configuring-sip-trunks/voxtelesys-sip-trunk/configuring-questblue-ip-authentication-trunk.md)
* [Configuring Voxtelesys Register Authentication Trunk](/portsip-communications-solution/configuring-sip-trunks/voxtelesys-sip-trunk/configuring-questblue-register-authentication-trunk.md)
* [Configuring Outbound & Inbound Calls](/portsip-communications-solution/configuring-sip-trunks/voxtelesys-sip-trunk/configuring-outbound-and-inbound-calls.md)
* [Voxtelesys SMS Integration](/portsip-communications-solution/configuring-sip-trunks/voxtelesys-sip-trunk/voxtelesys-sms-integration.md)