# 3CX

## Introduction

This Configuration Instruction describes how to set up a Telcobridges ProSBC for interworking between an ITSP’s SIP Trunk or remote client access for 3CX server.

### Prerequisites

* ProSBC devices must be installed as described in their respective with release 3.0.x/3.1.x. Release 3.0.x is not supported for TCP connections installation guides.
* 3CX.For additional information on 3CX, visit [3CX official web site](http://www.3cx.com/).

### Example Environments for SIPTrunking with 3CX

<figure><img src="https://3811773442-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FiK3TemJSDhHz3xNMOvvk%2Fuploads%2FdtOeQinraQODAJ753BFM%2Fimage.png?alt=media&#x26;token=195f9dac-5e2a-46b3-b711-d05b12922d40" alt=""><figcaption></figcaption></figure>

### Example Configuration

Step-by-step example SIP Trunk configuration.

* [Adding ProSBC as a SIP Trunk in 3CX Server](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-use-case/3cx-phone-provisioning-configuration/configuration-for-3cx-pbx-server-with-the-prosbc-as-sip-trunk)
* [SIP Trunk Configuration Instruction with 3CX](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-use-case/sip-trunking-configuration/sip-trunk-configuration-instruction-with-3cx)
* [T.38 Fax Configuration with 3CX](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-use-case/3cx-phone-provisioning-configuration/configuration-for-3cx-pbx-server-with-the-prosbc-to-receive-t38-faxes)

### Example Environments for Remote Workers with 3CX

<figure><img src="https://3811773442-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FiK3TemJSDhHz3xNMOvvk%2Fuploads%2FCr297Mq9GVVBlT6U5g7L%2Fimage.png?alt=media&#x26;token=70e49aac-a934-445d-ad32-0d77861e9348" alt=""><figcaption></figcaption></figure>

### Example Configuration

Step-by-step example Remote workers configuration.

* [3CX Phone Provisioning Settings](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-use-case/3cx-phone-provisioning-configuration)
* [Remote Workers Configuration Instruction with 3CX](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-use-case/remote-workers/remote-workers-configuration-instruction-with-3cx)

### 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="../../troubleshooting-and-support/troubleshooting-tips-and-actions/configuring-call-trace">Configure call trace</a></li><li><a href="../../troubleshooting-and-support/troubleshooting-tips-and-actions/configuring-call-trace/retrieving-call-trace">Retrieve call trace</a></li></ul></td><td><ul><li><a href="../../troubleshooting-and-support/troubleshooting-tips-and-actions/creating-a-test-call">Creating a Test Call</a></li></ul></td><td><ul><li><a href="../../troubleshooting-and-support/troubleshooting-tips-and-actions/tbreport">Capture a report of the system</a></li></ul></td><td><ul><li><a href="../../troubleshooting-and-support/troubleshooting-common-problems">Advanced Troubleshooting of ProSBC</a></li><li><a href="https://docs.telcobridges.com/wiki/FreeSBC:3CX:CSTA_Calls_never_ends">CSTA calls never ends</a></li></ul></td></tr></tbody></table>