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Incoming call on gateway IP

Occasional Visitor

Incoming call on gateway IP

We've had a situation pop-up when a video call is happening between two internal sites, where an incoming call window will pop-up (4-8 times in a 2 hour meeting), that incoming call is listed as the gateway IP. We've create a DMZ subnet for video conferencing/calls that allows outside calls, nothing blocked. Obviously this message is concerning as it could be an outside threat trying to gain access into our network. So my questions are: has anyone experienced this? Is it a bug in the equipment software or should it be viewed as an infiltration attack? Is there a way to configure access so that outside calls can be accepted without risking infiltration? Currently the meeting attendees just decline the call attempt. 


As I mentioned this seems to only happen when the video calls are between two internal sites. The equipment on one site is a Soundstation 2 with a module connecting to both the wall jack and Soundstation 2. The equipment ont the other sides is a Soundstation Premier, with no module. 


I have part and serial numbers of each unit, but unfortunately I can't provide software revs at this time. I'm a networking engineer brought into this because of the incoming gateway call, not the person who maintains the rev levels on the devices themselves.



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Polycom Employee & Community Manager

Re: Incoming call on gateway IP

Hello JenniMcW,

welcome to the Polycom Community.

I am unsue how the SoundStations would have anything to do with any messages on the screens as they are both analog Phones that would have no real connection to a codec.


In addition it would be usefull to know what Video codecs we are discussing here.


A wireshark trace from a spanned port should show you what IP address the call is coming from and also if this is a SIP call or a H.323.

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

The title Polycom 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.


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
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