---
title: "Poly Sidecar or Expansion Module Continuously Reboots"
slug: "poly-sidecar-or-expansion-module-continuously-reboots"
updated: 2026-05-21T18:31:31Z
published: 2026-05-21T21:27:00Z
canonical: "help.8x8.com/poly-sidecar-or-expansion-module-continuously-reboots"
---

> ## 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.

# Poly Sidecar or Expansion Module Continuously Reboots

## Symptom

After connecting a Poly Sidecar or Expansion Module to the physical device, the sidecar boots up continuously. The desk phone is connected and working properly, yet the sidecar does not come up with the lines configured in Admin Console. Rebooting the desk phone and sidecar does not fix the issue.

## Applies To

- Admin Console
- Poly Phones
- Sidecar or Expansion Module

## Resolution

Replace the desk phone the sidecar is connected to, as the AUX port might be faulty.

## Cause

This is due to a faulty or defective AUX port on the desk phone.