Which access technology allows simultaneous voice and high-speed data transmission?

Asymmetric Digital Subscriber Line (ADSL) is the correct choice because it is specifically designed to allow for simultaneous transmission of voice and high-speed data over traditional copper telephone lines. ADSL separates the frequency bands of voice and data, which enables both to occur at the same time without interference.

This technology utilizes higher frequency bands for data transmission, while leaving the lower frequency bands free for voice calls. This capability allows users to make phone calls and access the internet at high speeds concurrently, which is a significant advantage in communication technologies.

Fiber Optic Technology allows for high-speed data transmission and can also carry voice, but it is not traditionally associated with the simultaneous capabilities of voice and data over the existing phone lines that ADSL utilizes. Satellite Internet access provides internet connectivity but often experiences latency and is not designed for the simultaneous use of voice and high-speed data in the same effective manner. Local Area Networks (LANs) can support simultaneous data and voice transmission, but they operate primarily within a local context rather than over the broader telecommunication lines used for ADSL.