> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/configuration-details/configuration-by-use-case/sip-trunking-configuration/configuration-files-for-sip-trunking-scenario.md).

# Configuration Files for SIP Trunking Scenario

## Introduction

ProSBC Configuration Files for SIP Trunking Scenario Tutorial provides you with a scenario-based approach to configuring of ProSBC systems, using sample configuration files. Complete general installation configuration steps, before you begin configuring your specific application.

### Prerequisites

ProSBC devices must be installed as described in their respective installation guides.

### Typical SIP Trunking Sample without NAT

<figure><img src="https://docs.telcobridges.com/w/images/thumb/a/a3/SIP-Trunk-sample-config.png/800px-SIP-Trunk-sample-config.png" alt=""><figcaption></figcaption></figure>

### Typical SIP Trunking Sample with NAT

<figure><img src="https://docs.telcobridges.com/w/images/thumb/5/5c/SIP-Trunk-sample-config-NAT.png/800px-SIP-Trunk-sample-config-NAT.png" alt=""><figcaption></figcaption></figure>

### Modifying configuration file

You can download sample configuration for the SIP Trunking scenario from below;

{% file src="/files/YDPPRxFCWYKDeiPeDqxP" %}

{% file src="/files/A1XaLBuxu8dFWzeMknUa" %}

* Open the JSON file with a text editor
* Replace the following parameters in the file
  * \[tbsbc] with the hostname that you gave on the installation stage
  * \[WAN\_00\_IP] and \[LAN\_00\_IP] with IP addresses
  * \[WAN\_00\_Subnet] and \[LAN\_00\_Subnet] with IP subnets
  * \[WAN\_00\_Gateway] and \[LAN\_00\_Gateway] with Gateway IP addresses
  * \[WAN\_00] and \[LAN\_00] with currently configured IP interfaces (for example voip0 and voip1)
  * \[ITSP\_Proxy\_IP] with SIP Trunk Service Provider IP address (2 addresses in the file)
  * \[Local\_Proxy\_IP] with Local Proxy IP address (2 addresses in the file)
* If you downloaded Remote Office/Workers Sample Configuration with NAT file please replace the following parameter too
  * \[NAT\_IP\_Address] with your External IP (Public IP of the NAT device)
* Save the file

### Uploading and activating the sample configuration

* You need to use an SFTP client to upload the configuration file to ProSBC
* After upload the file using the following commands from CLI
* For SIP Trunking Sample Configuration without NAT

```
 tbconfig -u root -p root -C /configurations SIP_Trunk_main_config.json name="main_config"
 tbconfig -u root -p root -U /systems/system_1/target_configuration="main_config"
```

* For SIP Trunking Sample Configuration with NAT

```
 tbconfig -u root -p root -C /configurations SIP_Trunk_main_config_nat.json name="main_config" -u root -p root
 tbconfig -u root -p root -U /systems/system_1/target_configuration="main_config"
```


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