I was thinking along the same lines. Check to see if you can get the same data rate via ethernet connection. If that works, the issue is with the wifi setup or with the capability of what you are trying to connect to. If you have a reduced data rate, then possibly the issue is with the cabling that exists between the two devices. As an example, troubleshooting a similar issue today for a wired connection, I was maxing out at approx 200 Mb/s sec in my office, and 50 Mb/s in an upstairs room. After replacing a connector, which did nothing to help at all, I noticed that the basement DLink switch which was standing vertically, resulted in the connector to the upstairs room backing out of its port on the back of the switch ever so slightly. Lay the switch flat and voila, 200 Mb/s upstairs. So, small issues like that were not detectable at lower data rates, but now with the CGN3 pushing higher rates, attention to details, like ratings on connector cables, the quality of the connectors, etc, are warranted. Having a test platform that you know will support those higher data rates is another requirement. If you still have problems, can you post a description of the complete circuit, end to end.
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