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VoIP On Clear WiMax Tip

The tip: make sure all your cordless phones are DECT 6.0 models.

I’ve dumped AT&T and switched to Clear’s WiMax service.  At first, I had a lot of problems when using VoIP telephony and my normal cordless phone: I could almost always hear the other person fine, but they often had a lot of noise and dropouts on their end.

After doing a lot of testing, I found if I used a corded phone or DECT cordless phone, the quality was good; I had the problems described only when using normal phone, an older 2.4 GHz cordless model.  My theory is that the 2.4 GHz phone’s signal was interfering enough with Clearwire’s 2.5GHz signal to impact the upstream speed and latency.

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