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The Poly Phones Knowledge Base is live! We look forward to helping you with common issues and troubleshooting advice!
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‎01-04-2023 12:23 PM

HP Recommended

Hi, just wondering if anyone has purchased VVX250 recently? I bought a few of them and because of the new hardware the only firmware version it supports is 6.4.3. And this firmware version doesn't play well with MS Teams SIP gateway. The older version VVX250 can be downgraded to 6.3.1 which works well with MS Teams SIP gateway. I hope Poly can work with Microsoft together to fix this issue so version 6.4.3 can work with Teams SIP gateway.

25 REPLIES 25

‎01-04-2023 01:57 PM

HP Recommended

Hello @grca2022 ,

 

Welcome to the Poly Community.

 

We are working with our partner Microsoft on the new release. Due to the holiday season, this is delayed.

 

If you require an official answer the best and quickest way forward is to contact our Support organization as the community is run by volunteers only.


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

Best Regards

Steffen Baier

------------------------------------------------
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN
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‎01-04-2023 05:14 PM - last edited on ‎03-08-2024 07:51 AM by Level 14

HP Recommended

If it's the "SSL/TLS handshake failed" error you are seeing, see this article for a workaround: Unable to sign into the Microsoft SIP Gateway using Poly VVX due SSL/TLS handshake failed

 

Note that despite what the article says, this workaround cannot be set using Poly Lens; you must apply it manually through the web interface of the device. 

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‎01-05-2023 03:26 AM

HP Recommended

Hello @rgsteele1 

 

I have updated my article as I believed information I was given.

 

@grca2022 

 

We are working with our Partner Microsoft but due to the holidays, a change freeze has stopped them from rolling out the corrected software.

 

Best regards

 

Steffen Baier

------------------------------------------------
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN
Was this reply helpful? Yes No

‎01-05-2023 08:09 AM

HP Recommended

I did see the TLS handshake error which I was able to get around by changing the settings. But version 6.4.3 has major issues with Teams, the phone can login ok but it can't make or receive calls at all. This is a known issue and that's why Microsoft pulled this version off their website, reverted back to 6.3.1.

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‎01-05-2023 12:06 PM

HP Recommended

We have a number of VVX450 phones running 6.4.3.5059 that are working with the Teams SIP Gateway, but there may be something specific to your configuration causing the issue. If you contact Poly Support, perhaps they can provide a hotfix release.

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‎01-06-2023 10:52 AM

HP Recommended

Thanks, that's good to know. But it is true Microsoft knows there're issues with the newer version, and that's why they first pushed out the 6.4.3 and then reverted back to 6.3.1. I had this issue when all my phones got updated automatically by Micrsoft, I opened a case with both Poly and Microsoft and Poly support confirmed that the newer firmware is causing issue. I'm surprised to know it works for you, maybe the VVX250 and VVX450 work differently.

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‎01-06-2023 02:11 PM

HP Recommended

Hello @grca2022 

 

do you have any Microsoft reference for the dropped/unable to make call issue?

 

I have checked with my internal contacts dealing with our Partner Microsoft and they are not aware of an issue.

 

Best Regards

 

Steffen Baier

------------------------------------------------
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN
Was this reply helpful? Yes No

‎01-06-2023 02:19 PM

HP Recommended

The case number I had with Poly was 34317815. The case number with Microsoft was 32633732

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‎01-12-2023 05:31 AM

HP Recommended

Hello @grca2022  and @rgsteele1 

 

UC Software 6.4.4 is now active in Lens and I did a quick test using the Microsoft SIP gateway and this works and is not downgraded.

 

Best Regards

 

Steffen Baier

------------------------------------------------
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN
Was this reply helpful? Yes No
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† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.