---
title: "How to troubleshoot the “Please check your internet connection” error"
slug: "how-to-troubleshoot-the-please-check-your-internet-connection-error"
description: "Learn how to overcome internet-related errors with ease."
tags: ["bandwidth", "connection issue", "internet issues", "Product error ", "VPN"]
updated: 2026-03-04T01:27:22Z
published: 2026-03-04T01:27:22Z
---

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

# How to troubleshoot the “Please check your internet connection” error

No one likes an error message, and the '*Please check your internet connection'* error is no exception.

Let's go over the steps to troubleshoot this error.

> [!NOTE]
> Note
> 
> This article is for corporate networks only. If you are troubleshooting your home network, please follow the instructions in this [Help Center article.](/v1/docs/home-network-troubleshooting-tips)

## Bandwidth

To avoid call quality issues, we recommend using a high-speed DSL, cable, or fibre-optic internet connection. Make sure your connection has a dedicated upload and download voice bandwidth of 100 kilobits/sec for each voice line.

## FQDNs

Dialpad requires [specific FQDNs](/v1/docs/network-setup-recommendations#fqdns) to be allowed for routing, security, system maintenance, and remote device management communication.

## Open ports

After reassuring that the traffic is whitelisted to the above-mentioned FQDNs, you’ll need to open certain ports. The ports vary depending on the type of Dialpad clients (native app, Obihai, mobile) you plan to use on a given network.

### **For Desktop Native, Mobile, & Browser Applications**

| **Port** | **Protocol** | **Traffic Type** |
| --- | --- | --- |
| 443 | HTTPS (TCP) | Product features (images, social profiles etc) |
| 443 | HTTPS (TCP) WSS (TCP) | Messaging, images, social profiles. |
| 5060, 7060 | UDP and TCP | Transport |
| 443, 5061 | WSS (TCP) SIP/TLS (TCP) | Call Signaling |
| 16384 to 32768 | SRTP (UDP) | Call Media (audio and video data), active calls, RP & SRTP |
| 19301 to 19302 | UDP | STUN for NAT traversal |
| 443 | UDP and TCP | TURN for NAT traversal |
| 53 | DNS (SRV records) | Server Discovery |

### **For Desk Phones - Poly, Obi-Edition & UCS and Yealink**

| **Port** | **Protocol** | **Traffic Type** |
| --- | --- | --- |
| 443 | HTTPS (TCP) | Provisioning |
| 5060, 7060 | UDP and TCP | Transport |
| 5061 | SIP/TLS (TCP) | Call Signaling |
| 16384 to 32768 | STRP (UDP) | Call Media |
| 443 | TCP | Poly Zero Touch (ZTP) |
| 80, 443 | TCP | Firmware Downloads |
| 123 | NTP (UDP) | Network Time Service |

> [!NOTE]
> Note
> 
> The issue should be corrected after setting your FQDNs, verifying the open ports, and checking for sufficient bandwidth. If the issue persists, please contact [Customer Care.](https://dialpad.com/contact-support)

For additional setup instructions, please visit our detailed Network Setup Recommendations in this [Help Center article](/v1/docs/network-setup-recommendations).

## Related

- [Network Setup Recommendations](/network-setup-recommendations.md)
- [Home Network Troubleshooting Tips](/home-network-troubleshooting-tips.md)
- [Network Terms](/network-terms.md)