My OBi100/Google-Voice setup worked well with U-verse Motorola Gateway for over two years. Because of Google Voice not supporting Obihai devices after May 15, I did a 30-day trial with magicJack PLUS, which worked fairly well with the Motorola Gateway.
Then, I switched to Cox and was provided a Gearhead Wireless Cable Gateway CG3000D, and both the OBi100/Google-Voice setup and the magicJack PLUS setup stopped working properly. The main problem is the callee doesn't always receive sound. That is, if I say one, two, three, four, five, six, the callee may not hear one or two numbers. The same situation exists for automated equipment when I key in a series of numbers or speak them.
Obihai Support suggests the Gateway needs prioritizing for upload bandwidth of 100 Kbps by adjusting the Quality of Service (QoS). However, there is no such adjustment on my Gearhead Gateway as there is on a Linksys Gateway, for example. Further, Cox Support says such changes aren't recommended.
Has anyone experienced the situation I've presented? If so, please tell me how the problem was corrected.