CCX400/600 starts randomly stuttering

Occasional Contributor

CCX400/600 starts randomly stuttering

We've discovered that the CCX400 and 600 has a stuttering bug. On a random moment the speaker or headset starts to turn green and white very quickly en you hear the speaker or horn starts to stutter the tone. The only temporary fix for this is to restart the phone.

We manage the phones using the teams portal.


Teams Admin Agent:
Company Portal App: 5.0.4771.0
OEM Agent App: 1.0.16
Teams App: 1449/
Message 1 of 3
Polycom Employee & Community Manager

Re: CCX400/600 starts randomly stuttering

Hello @KoenSupport ,


Welcome to the Poly Community.

The software you are running is not a GA software so this tenant maybe some part in the Microsoft TAP.


Microsoft and Poly are aware of this issue and Microsoft is adding a fix for this into the Teams IP Phone Android app.


The issue is tracked by Microsoft and the only workaround, for now, is to Downgrade at least the CCX500 to the original


Within Poly we are tracking this as EN-180835


Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier


If official support is required please check how to phone or open a case here

The title Poly Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


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Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
Please also ensure you always check the VoIP , Video Endpoint , Microsoft Voice , PSTN or other FAQ's in the different sections
Message 2 of 3
Occasional Contributor

Re: CCX400/600 starts randomly stuttering

The problem seems to be fixed in the new firmware update: 6.2.21.xxxx

Message 3 of 3