---
title: "Announcement Technologies FreePBX (Asterisk) Server NIC Layout"
slug: "announcement-technologies-freepbx-asterisk-server-nic-layout"
updated: 2024-12-19T06:36:17Z
published: 2024-12-19T06:36:17Z
canonical: "docs.telosalliance.com/announcement-technologies-freepbx-asterisk-server-nic-layout"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.telosalliance.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Announcement Technologies FreePBX (Asterisk) Server NIC Layout

## Scope

Here we will discuss the numbering of each network interface on an Announcement Technologies FreePBX (Asterisk) server, often provided as part of a Telos VX system.

*Any information provided here regarding "Asterisk" or "FreePBX" servers refers only to Telos-commissioned FreePBX (Asterisk) servers used with Telos Alliance telephony products. While these are third-party servers and software, we are able to provide limited pointers and advice (like this article) under normal support.*

> [!NOTE]
> We are also happy to provide advanced, dedicated support and training on a VX and FreePBX system through various paid [TelosCare Service Level Agreement](http://telosalliance.com/teloscare) options, or a la carte via our Dedicated Remote and Onsite Support service. Please use the Contact Us link above for more information on these options. We can guide you through this entire process.

## Network interface layout

The Announcement Technologies FreePBX (Asterisk) servers come with either four or six network interfaces. A common question is "how are the network interfaces numbered?"

There are four network interfaces on the motherboard, clustered in a 2x2 grid, numbered eth0 - eth3.

Optionally, if ordered, there are two additional network interfaces on a PCIe NIC, eth4 - eth5.

This illustrates the layout of the network interfaces as viewed from the rear of the server:

![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/d5657874-e32e-4add-aa19-9a3f676b00a4-image.png)

> [!NOTE]
> There is an additional network interface to the left of the 2x2 eth0 - eth3 cluster. This is the [SuperMicro IPMI interface](https://en.wikipedia.org/wiki/Intelligent_Platform_Management_Interface), used for out of band management of the server. This network interface is not accessible to the server operating system and thus is not used for day-to-day operation of your Telos VX system. It can be ignored unless your IT department is familiar with IPMI.