What does ttyUSB mean? Sometimes, the embedded microcontroller does not come with a hardware USB interface. While it is possible to use a software-only USB stack, the additional constraints put onto the CPU and the usually small storage size often lead board designers to include a dedicated UART to USB bridge.
Because of a busy weekend I didn't really follow up other than via emails and this still hasn't been resolved. The consistent word from them was that porting a number sometimes takes 24 to 48 hours.. I spoke to a rep by phone today who promised it would be done within 2 to 4 hours.. It wasn't.
So my question is, how long does it take after porting out a phone number (to Google Voice or to anywhere else) before your service is fully disconnected? I asked three customer reps and got three different answers (one had no idea, one said 3-5 hours, and one said end of the billing cycle).