Abstract
The high data rates required to properly support emerging multimedia internet applications far exceed the capabilities of voiceband modems. For example, seamless real-time delivery of digital video clips might require connections up to 100 times faster. Asymmetric digital subscriber line (ADSL) modems provide residential internet users with a much-needed solution to this remote access bandwidth shortage. ADSL modems connected directly to the internet are installed in the telephone company central office, allowing remote access over the copper twisted pair telephone line by remote transceivers in the homes of residential customers. Because the internet data does not have to pass through the telephone switching network, the ADSL link can provide data rates in the Mbit/sec range. However, for ADSL modems to gain broad acceptance an displace their low rate voiceband counterparts, low cost, ease of installation, and high quality of service must be achieved.
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