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Soundstructure Voip DTMF not working


Soundstructure Voip DTMF not working

Hi There,


I have a Soundstructure C16 with a VoIP interface UC version Now once I dial onto a bridge/conference and the call is connected I am unable to dial directly anything further like extensions/password via DTMF. 

I doubt it has anything to do with SIP Inbound (RFC2833) or SIP INFO (RFC2976) settings or any other settings as the above scenario works perfectly using a Polycom Soundpoint IP450 over the same line and connecting to the same server/Provisioning Server.


Any help/insight would be useful.

Message 1 of 2
Polycom Employee & Community Manager

Re: Soundstructure Voip DTMF not working

Hello saj4jc,

welcome to the Polycom Community.

UCS 5.0.0 is a completely outdated Software and you did not post the SPIP450 Software Version in comparison.


In order to troubleshoot this we require a wireshark trace and phone logs.


Please work with your Polycom reseller to brings this to the attention of Polycom support.

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

Please be aware:

The purpose of these forums is to allow community members collaborate and help each other.
Questions posted here do not follow Polycom’s SLA guidelines.
If you require assistance from Polycom technical support, please open a
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The above is necessary in order to track issue internally within Polycom.

You are welcome to post more questions or configuration or logs for other community members to look at but if your issue requires a fix via Polycom you must go via the official support structure.

Please ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's

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This forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer.
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Message 2 of 2