# Avaya IP Office Trunk Creation

## Introduction

This document provides instructions on how to add a SIP Trunk to Avaya IP Office to work with the ProSBC. Please visit the following link for more details [Avaya Support](https://support.avaya.com/products/P0160/ip-office-platform).

## Avaya IP Office SIP Trunk Configuration

1\. First, please ensure that the Avaya IP Office SIP Trunk Channels license key is available to allow SIP trunking.

<figure><img src="https://docs.telcobridges.com/w/images/thumb/2/2a/Avaya_license.png/500px-Avaya_license.png" alt=""><figcaption></figcaption></figure>

2\. The Avaya IP Office LAN settings in this example are shown below. The IP address in the one that was set for the ProSBC NAP as shown in the LAN Settings -> IP Address. Ensure that SIP Trunks Enable option is set to allow SIP trunking. Ensure that Firewall/NAT Type configurations are set to your local requirements.<br>

<figure><img src="https://docs.telcobridges.com/w/images/thumb/e/ee/Avaya_system_settings.png/500px-Avaya_system_settings.png" alt=""><figcaption></figcaption></figure>

3\. The Telephony settings are mostly use defaults. The Inhibit Off-Switch Forward/Transfer must be disabled to allow call forwarding or call transferring towards the SIP Trunk of the Avaya IP Office.<br>

<figure><img src="https://docs.telcobridges.com/w/images/thumb/3/3b/Avaya_telephony_settings.png/500px-Avaya_telephony_settings.png" alt=""><figcaption></figcaption></figure>

4\. Please ensure that at minimum the G.711 codecs are set and the RFC2833 Default payload value conforms to the one set in the ProSBC Profile

<figure><img src="https://docs.telcobridges.com/w/images/thumb/7/7b/Avaya_voip_settings.png/500px-Avaya_voip_settings.png" alt=""><figcaption></figcaption></figure>

5\. The ProSBC related SIP Line here is used as follows<br>

<figure><img src="https://docs.telcobridges.com/w/images/thumb/2/26/Avaya_sip_settings.png/500px-Avaya_sip_settings.png" alt=""><figcaption></figcaption></figure>

* The ITSP Domain Name is left blank as this allows using the provided ITSP Proxy Address field value that will be set in the Transport tab.
* In Service must be selected for enabling the SIP Line.
* Check OOS is also set for enabling SIP Options as a keep alive.

6\. The ITSP Proxy Address is set to the ProSBC IP address. You can change the Network Configuration values or leave as their defaults.<br>

<figure><img src="https://docs.telcobridges.com/w/images/thumb/f/fc/Avaya_transport_settings.png/500px-Avaya_transport_settings.png" alt=""><figcaption></figcaption></figure>

7\. The '*Call Details* of the ProSBC related SIP line are used as shown below<br>

<figure><img src="https://docs.telcobridges.com/w/images/thumb/e/eb/Avaya_calldetails_settings.png/500px-Avaya_calldetails_settings.png" alt=""><figcaption></figcaption></figure>

8\. The Codec Selection is used with a Custom codec selection.In our example, we used G.711 codec. You can select other codecs too. But you need to be sure the ITSP must support other codecs too. Otherwise, you will need to use a transcoding device. You can select Re-Invite Supported and other parameters too.<br>

<figure><img src="https://docs.telcobridges.com/w/images/thumb/7/79/Avaya_codec_settings.png/500px-Avaya_codec_settings.png" alt=""><figcaption></figcaption></figure>

9\. Short Code Section you can configure which codes will passthrough through ProSBC.

<figure><img src="https://docs.telcobridges.com/w/images/thumb/8/89/Avaya_shortcode_settings.png/500px-Avaya_shortcode_settings.png" alt=""><figcaption></figcaption></figure>

10\. The Incoming Call Route entry for the ProSBC is shown next. The dot symbol for the Destination value matches the Incoming Number field. In this example this field is blank, so any destination value will match.<br>

<figure><img src="https://docs.telcobridges.com/w/images/thumb/f/f5/Avaya_incomingroute_settings.png/500px-Avaya_incomingroute_settings.png" alt=""><figcaption></figcaption></figure>


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