---
title: "Unable to Make Calls in 8x8 Work for Desktop After Update"
slug: "unable-to-make-calls-in-8x8-work-for-desktop-after-update"
updated: 2026-04-16T12:51:08Z
published: 2026-05-21T21:27:46Z
canonical: "help.8x8.com/unable-to-make-calls-in-8x8-work-for-desktop-after-update"
---

> ## 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.

# Unable to Make Calls in 8x8 Work for Desktop After Update

## Symptom

After updating to 8x8 Work for Desktop, you see an error that reads, *"Connecting to Phone Service"* and *"Unable to Connect to Phone Service."* Users are unable to make or receive calls in 8x8 Work for Desktop after updating.

## Applies To

- 8x8 Work for Desktop

## Resolution

Log in to the web GUI for your router and ensure that TCP ports 5196-5199 are not blocked on the firewall.

## Cause

A change was made to the signaling ports that 8x8 Work for Desktop uses.