# Twilio

## Introduction

[Twilio Elastic SIP Trunking](https://www.twilio.com/docs/sip-trunking) is a cloud-based solution that provides connectivity for IP-based communications infrastructure to connect to the PSTN for making and receiving telephone calls to the rest of the world via any broadband internet connection. Twilio’s Elastic SIP Trunking service automatically scales, up or down, to meet your traffic needs with unlimited capacity. In just minutes you can deploy globally with Twilio’s easy-to-use self-service tools without having to rely on slow providers.

Sign up for a [free Twilio trial](https://www.twilio.com/try-twilio) and learn more about [configuring your Twilio Elastic SIP Trunk](https://www.twilio.com/docs/sip-trunking)

ProSBC is connects your IP-PBX to Twilio Elastic SIP Trunking. This article describes how to connect ProSBC to Twilio Elastic SIP Trunking.

### Prerequisites

* ProSBC devices must be installed as described in their respective installation guides.
* Twilio Elastic SIP Trunking Account. Please visit the following link for more details about [Twilio Elastic SIP Trunking](https://www.twilio.com/docs/sip-trunking)

### Example Environments for SIPTrunking with Twilio

<figure><img src="/files/ChgBboVVRg5YEwE3M56A" alt=""><figcaption></figcaption></figure>

### Example Configuration

Step by step example SIP Trunk configuration.

* [Twilio Elastic SIP Trunking Configuration](/configuration-details/configuration-by-use-case/sip-trunking-configuration/sippy-sip-trunk-creation.md)
* [ProSBC Configuration for Twilio Elastic SIP Trunking](/configuration-details/configuration-by-use-case/sip-trunking-configuration/sip-trunk-configuration-instruction-with-twilio-elastic-trunking.md)

### Troubleshooting

<table><thead><tr><th width="200">Call Trace</th><th width="200">Test Call</th><th width="200">TBReport</th><th width="200">Advanced Troubleshooting of ProSBC</th></tr></thead><tbody><tr><td><ul><li><a href="/pages/wANvjzXmam8kffkMPw9X">Configure call trace</a></li><li><a href="/pages/0xUPGJa2HODY3Q6dXomj">Retrieve call trace</a></li></ul></td><td><ul><li><a href="/pages/X5qsI1juaiqbPcEAM4kK">Creating a Test Call</a></li></ul></td><td><ul><li><a href="/pages/o5WkY2J8kt6xmZ8P9npo">Capture a report of the system</a></li></ul></td><td><ul><li><a href="/pages/JtFwsTqktzofDpi5TFoE">Advanced Troubleshooting of ProSBC</a></li></ul></td></tr></tbody></table>


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