What is the radio equipment that provides the primary communications to the subscriber's handset?

• A. Base Station Transceiver System(BTS)
• B. Base Transceiver Station (BTS)
• C. Mobile Switching Center
• D. Radio Access Network

Answer: (A)

The part that actually talks to your phone over the air is the radio equipment at the base station. This device handles the wireless link, transmitting and receiving RF signals to and from the subscriber’s handset, which is why it’s the primary communications path for the user. In many descriptions this radio portion is called the Base Station Transceiver System (often shortened to BTS), so this option reflects that fundamental role. The Mobile Switching Center sits in the core network and handles call routing and control, not the direct radio link to the handset. The Radio Access Network is the broader radio network as a whole, not a single piece of equipment, so it isn’t the direct device that provides the handset’s primary communications.