# Adding ProSBC as a SIP Trunk in the Yeastar P-Series Cloud

## Introduction

This document provides instructions on how to configure Yeastar P-Series Cloud with the ProSBC as SIP trunk. Please visit the following link for more details about [Yeastar P-Series Cloud documentation](https://help.yeastar.com/en/p-series-cloud-edition/)

## Yeastar P-Series Cloud SIP Trunk Configuration

1 - Log in to PBX management portal, go to Extension and Trunk > Trunk, click Add.

<figure><img src="https://docs.telcobridges.com/w/images/thumb/a/a7/Yeastar_add_trunk_1.png/200px-Yeastar_add_trunk_1.png" alt=""><figcaption></figcaption></figure>

2 - In the Basic section, configure the following settings:

```
    Name: Enter a name to help you identify it.
    Trunk Status: Select Enabled.
    Select ITSP Template: Select General.
```

<figure><img src="https://docs.telcobridges.com/w/images/thumb/b/b9/Yeastar_add_trunk_2.png/800px-Yeastar_add_trunk_2.png" alt=""><figcaption></figcaption></figure>

3 - In the Detailed Configuration section, select the trunk type and enter the PROSBC SIP information.

```
    Select PeerTrunk (PortBased) from Trunk Type drop-down menu
    The Static IP Address and Port of the PBX will be displayed on the web page. This information will be use to configure NAP in ProSBC.
    Transport: Select the transport configured on ProSBC. In this scenario, select UDP. 
    Hostname/IP: Enter the domain name or IP address of the ProSBC. In this scenario, enter sip.provider.com. You can use IP address of the ProSBC too.
    Port: Enter the provided ProSBC port. In this scenario, enter 5060.
    Domain: Enter the domain in the SIP URI of a specific header like From, To header. In this example, enter sip.provider.com. You can use IP address 
                  of the ProSBC too.
    Click Add.
```

<figure><img src="https://docs.telcobridges.com/w/images/thumb/1/15/Yeastar_add_trunk_3.png/800px-Yeastar_add_trunk_3.png" alt=""><figcaption></figcaption></figure>


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