A friend received phone calls from people include me who use I-Talk Global phone system.
She picked up, they can't hear her,she can't hear them either. However, if she called right back, it's no problem, they can hear her, and they told her: they can only hear the Du Du soound when they called vonage.
This is happening for all my friends who is using Italkbb to call Vonage phone.
Anyone experience such issue, I don't know which one Italk or vonage to blame now.
I have Italk, but no Vonage.