# 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="/files/EUvxXYCsVdvm3wa5H5Uk" alt=""><figcaption></figcaption></figure>

### Example Configuration

Step-by-step example SIP Trunk configuration.

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

### Example Environments for Remote Workers with 3CX

<figure><img src="/files/O4yWob84PFi9IW9Af5qu" alt=""><figcaption></figcaption></figure>

### Example Configuration

Step-by-step example Remote workers configuration.

* [3CX Phone Provisioning Settings](/configuration-details/configuration-by-use-case/3cx-phone-provisioning-configuration.md)
* [Remote Workers Configuration Instruction with 3CX](/configuration-details/configuration-by-use-case/remote-workers/remote-workers-configuration-instruction-with-3cx.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><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>


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