---
title: "Call Quality Issue When Calls Answered Using Sennheiser Headset"
slug: "call-quality-issue-when-calls-answered-using-sennheiser-headset"
updated: 2026-05-15T16:52:28Z
published: 2026-05-21T21:28:00Z
canonical: "help.8x8.com/call-quality-issue-when-calls-answered-using-sennheiser-headset"
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.

# Call Quality Issue When Calls Answered Using Sennheiser Headset

## Symptom

Users experienced call quality issues when calls are answered using a Sennheiser headset.

## Applies To

- Sennheiser DW BS ML headsets
- Poly VVX 600

## Resolution

Disable Echo Cancellation.

## Cause

The issue was caused by the Echo Cancelation option being enabled, which is not required with Sennheiser headsets. In this case, the 8x8 Phone System configuration included Sennheiser DW BS ML headsets plugged into Poly VVX 600 physical phones.