---
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: 2026-08-04T17:24:39Z
published: 2026-08-04T17:24:39Z
canonical: "help.dialpad.com/how-to-troubleshoot-the-please-check-your-internet-connection-error"
---

> ## 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**

| **Traffic Type** | **Protocol** | **Domain** | **Port** |
| --- | --- | --- | --- |
| Product features (images, social profiles etc) | HTTPS (TCP) | *.dialpad.com *.dialpadcdn.com | 443 |
| Messaging | HTTPS (TCP) WSS (TCP) | *.dialpad.com *.ubervoip.net | 443 |
| Transport | UDP and TCP | *.dialpad.com *.ubervoip.net | 5060, 7060 |
| Call Signaling | WSS (TCP) SIP/TLS (TCP) | *.dialpad.com *.ubervoip.net | 443, 5061 Note: Port 5061 is only used with the mobile app. |
| Call Media | SRTP (UDP) | No specific domain or IP | 16384 to 32768 |
| Customer Media (contact, avatar, MMS images) | HTTP (TCP) | No specific domain or IP | 443 |
| STUN | UDP and TCP | turn.ubervoip.net | 443 (Native and Web) 19302 (Mobile only) |
| TURN | UDP and TCP | turn.ubervoip.net | 443 |
| Server Discovery | DNS (SRV records) | google-public-dns-a.google.com google-public-dns-b.google.com | 53 |

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

| **Traffic Type** | **Protocol** | **Domain** | **Port** |
| --- | --- | --- | --- |
| Provisioning | HTTPS (TCP) | prov.dialpad.com prov10.dialpad.com prov10.ubervoip.net prov12.dialpad.com prov12.ubervoip.net activation.ubervoip.net | 443 |
| Transport | UDP and TCP | ubervoice.ubervoip.net ubervoice2.ubervoip.net | 7060 |
| Call Signaling | SIP/TLS (TCP) | ubervoice.ubervoip.net ubervoice2.ubervoip.net | 5061 |
| Call Media | STRP (UDP) | ubervoice.ubervoip.net ubervoice2.ubervoip.net | 16384 to 32768 |
| Poly Zero Touch (ZTP) | TCP | *.poly.com | 443 |
| Firmware Downloads | TCP | downloads.polycom.com storage.googleapis.com | 80, 443 |
| Network Time Service | NTP (UDP) | pool.ntp.org time.google.com time2.google.com | 123 |
| Directory Services (LDAP) | TCP | devicesldap.dialpad.com | 389 |
| Yealink Remote Provisioning Services (RPS) | TCP/UDP | *.yealink.com | 443 |
| Yealink Management Cloud Service | DM and HTTPS | *.ymcs.yealink.com *.yealink.com | 443, 8110, 8443, 8445, 8446 |
| Grandstream Device Management Service | TCP | firmware.grandstream.com *.gdms.cloud | 443, 8443 |
| Mitel Redirection and Configuration Service ([RCS](https://www.mitel.com/document-center/devices-and-accessories/ip-phones/general-ip-phone-documentation/all-releases/en/redirection-and-configuration-service-rcs-user-guide)) | TCP/UDP | rcs.mitel.com | 443 |

> [!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)