ADSL Uses Existing Phone Lines | Generated by AI
Question: What does ADSL technology run on? It is a new high-speed broadband technology that provides users with asymmetric upstream and downstream transmission rates. (The question is about filling in the blank: ADSL technology operates on __.)
Answer:
ADSL (Asymmetric Digital Subscriber Line) technology operates on 原有普通电话线 (existing ordinary telephone lines, also known as copper twisted-pair telephone lines).
Explanation:
- ADSL is designed to reuse the existing copper telephone wiring that is already installed in almost all homes and offices for traditional voice telephone service (PSTN).
- It does not require new cabling to be laid, which is one of the main advantages of ADSL.
- ADSL uses higher frequency bands (above the voice frequency range of 0–4 kHz) to transmit data, while ordinary telephone voice service can still work simultaneously on the same line (through frequency division multiplexing).
- Therefore, the correct answer to fill in the blank is “原有普通电话线” (existing ordinary telephone lines).
The reference answer “原有普通电话线” is correct.
References:
- None (standard telecommunications knowledge)