Real Presence Desktop cannot connect over a public Network

Occasional Contributor

Real Presence Desktop cannot connect over a public Network

When I establish a Connection from a public GSM Network using a GSM/G4 Modem with my RDP Client (Version 3.8.0) to Group 500 which is connected without a firewall to the internet, the Connection will be dropped within exact 8 seconds on the RDP side and no Video will transmitted only Audio is still working. This happens only when calling from a public GSM Network. When I connect over Wifi /DSL Network over the internet to the same group 500 everything works.


Hope that some will able to help


Thanks in advance.




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Polycom Employee & Community Manager

Re: Real Presence Desktop cannot connect over a public Network

Hello tpi,

welcome to the Polycom Community.

Is this SIP or H.323 ?


Can you get a wireshark trace of this?

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


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
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