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Problems with wideband negotiation on VTX 1000

Occasional Contributor

Problems with wideband negotiation on VTX 1000

Has anyone successfully debugged problems with wideband negotiations on the VTX 1000?  We've had these devices for years and they've been really solid.  We changed to a new voice provider and they were working until a few months ago.  Now our chance of a successful negotiation is well under 50%.


Our voice service is preseted to our switch as a PRI, but I know that it's converted to IP upstream from our switch.  There's an Adtran box in our server room that's taking IP voice and presenting it to us as a PRI.  This worked fine, ,but then something changed and now we've got problems.  Does anyone have any experience with this?



Message 1 of 3
Polycom Employee & Community Manager

Re: Problems with wideband negotiation on VTX 1000

Hello ppters86,

welcome to the Polycom Community.

Our support page holds this document => here <=


Most likely its your IP connection using some codec or other.

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

Best Regards

Steffen Baier

Polycom Global Services


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. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
Message 2 of 3
Occasional Contributor

Re: Problems with wideband negotiation on VTX 1000

I've reviewed the documentation that you suggested.  Given that I have no control over what codecs are being used in transit, this is a real problem.  


Do you folks know of any carriers that will provide a codec free guarantee on calls?  Given that I only control one end of the conversation, I'm not even sure that would guarantee no problems.


Is there newer technology available that would provide good call quality without the codec sensitivity of the VTX 1000?



Message 3 of 3