SMC Networks SMC7003USB V.2 - Manual (Page 15)

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NTRODUCTION
The EZ Connect ADSL USB Modem (SMC7003USB V.2) provides
high-speed Internet access over existing phone lines by making use of
previously unused frequency bandwidth above the voice band. By placing
ADSL (Asymmetric Digital Subscriber Line) signals above the frequency
of the voice signal, ADSL service can coexist on the same line with your
telephone service. ADSL is asymmetric in that it provides a higher data
rate in the downstream (receive) direction than in the upstream (transmit)
direction. Asymmetric operation is ideal for typical home and small office
use where files and information are downloaded more frequently than
uploaded.
The EZ Connect ADSL USB Modem supports both full-rate Discrete
Multi-Tone (G.dmt) connection (T1.413, Issue II) and the more
economical G.lite connection (G.992.2). This modem delivers concurrent
data and voice over a single connection. It also supports a Rate Adaptive
algorithm to maintain high data integrity under existing conditions,
including varied connection lengths and degraded signal quality. Because
all data is encapsulated in ATM frames, the EZ Connect ADSL USB
Modem can be connected directly to any standards-compliant DSL Access
Multiplexer (DSLAM) at your service provider’s central office, data is then
sent through an ATM backbone, and out to the Internet via an ISP router.
Moreover, there is no need to install any new line.