CDMA 850 is CDMA technology operating in the Cellular (850 MHz) frequency band. Before the existence of GSM 850, the Cellular band was often referred to as the "800 MHz" band. "850 MHz" implies a ...
Cellphones use the GSM or CDMA technology, whereas the desktop phones that connect to an in-house PBX or key system convert speech to a digital signal (see sampling). THIS DEFINITION IS FOR ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果