---
title: "0X4020 Error Message Displayed on Poly IP Phones"
slug: "0x4020-error-message-displayed-on-poly-ip-phones"
updated: 2026-05-21T18:32:56Z
published: 2026-05-21T21:27:00Z
canonical: "help.8x8.com/0x4020-error-message-displayed-on-poly-ip-phones"
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.

# 0X4020 Error Message Displayed on Poly IP Phones

## Symptom

Your Poly phone's screen shows the error *0x4020*.

## Applies To

- Poly IP Phones

## Resolution

### Check and Set Time Server

For this process, you will first need your phone's. (See [What is the administrator password for my phone or adapter?](/docs/viewArticle.html) ) After you have that, continue below. **On your phone:**

1. Press the **Menu/Home** button.
2. Select **Settings**.
3. Select **Advanced**.
4. Enter **phone password**, then press **Enter**.
5. Select **Admin Settings**.
6. Select **Network Configuration**.
7. Scroll down to **SNTP** and ensure the address is set to **pool.ntp.org**.
8. Press **OK** (if time server had to be set), then press **Back**.
9. Select **Save Config**.
10. Back all the way out to the main screen.

**If date and time continue to flash:** The SNTP may not be able to reach the designated time server. Instead of pool.ntp.org, try setting one of the following IP addresses:

- 15.185.186.215
- 204.2.134.163
- 204.2.134.164
- 209.114.111.1

Or **ping pool.ntp.org** and use the reply address as the SNTP address.

### Set a Static IP

If manually setting the SNTP time server did not resolve the error, it may help to set a static IP on the phone. You can set a static IP either on the phone itself or via the phone's web interface (GUI). For detailed instructions, see [Set a Static IP on a Poly Phone](/support/docs/set-a-static-ip-on-a-poly-phone) .

> [!NOTE]
> ***Note:***
> 
> *if available, we highly recommend consulting an IT or networking professional when dealing with network issues.***Before you begin**

1. Obtain the phone's password.
2. Set a static IP. See [Determine a Static IP Address to Set on an IP Phone](/support/docs/determine-a-static-ip-address-to-set-on-an-ip-phone) .

**Set in Phone Web GUI (Recommended):**

1. Ensure the phone is powered on and connected to the network.
2. In a web browser on a computer on the same network as the phone, enter the phone's IP address.
3. Log in as **Admin** and enter **phone password**.
4. Click **Settings** > **Network** > **Ethernet**.
5. Set **DHCP** to **Disable**.
6. Enter intended static **IP address**.
7. Enter **Subnet Mask**.
8. Enter **IP Gateway**.
9. For **DNS Server**, enter: **8.8.8.8**.
10. For **DNS Alt**, enter: **8.8.4.4**.
11. On the bottom right, click **Save**.
12. Wait for the phone to reboot. If it does not reboot, verify the information, then manually power-cycle the phone (remove it from the power source, wait at least a full minute, then plug it back in and power it on).

**Set on Phone:**

1. Disable DHCP: **Menu** > **Settings** > **Advanced** > **Admin Settings** > **Network Config** > **DHCP Client**.
2. Set static IP: **Menu** > **Settings** > **Advanced** > **Admin Settings** > **Network Config**.
3. Set the following:
  - IP address
  - Subnet Mask
  - Gateway
  - DNS 1: 8.8.8.8
  - DNS 2: 8.8.4.4
4. Save settings by backing out and rebooting.

## Cause

This error typically indicates that the time server needs to be programmed, or that the phone is unable to reach the time server.