---
title: "How to Determine if an OBi300 is Defective"
slug: "how-to-determine-if-an-obi300-is-defective"
updated: 2026-05-17T16:47:05Z
published: 2026-05-21T21:27:17Z
canonical: "help.8x8.com/how-to-determine-if-an-obi300-is-defective"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.8x8.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Determine if an OBi300 is Defective

## Objective

Determine whether an Obihai 300 is in a good working status.

## Applies To

- Poly OBi300
- Overhead Paging
- Fax

## Procedure

### Gather the IP Address of the Obihai

1. Connect an analog phone to the Obihai adapter.
2. Dial #123 to retrieve the IP and note it down.
3. Navigate to this IP address in a browser, on a computer that is on the same network and the adapter.

### Log in to the Adapter

1. Log in to web GUI of the OBI 300.
2. From the Status Menu, select PHONE Port Status.
3. If the Line Port status or Port Status doesn't have any entries or Voltage value, it's defective. ![Obi300_bad.JPG](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/2284)

Example of a good, working OBI 300 ![obi300_good.JPG](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/2285)