SMC Networks SMC7904WBRAS-N2 V2 - QUICK, User Manual

Page: 86 / 156

C
HAPTER
7
| WAN Settings
ADSL Settings
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ADSL S
ETTINGS
The ADSL Settings page configures the ADSL modulation type, ADSL2+
related parameters, capabilities and the ADSL tone mask.
Figure 43: ATM Settings
The following items can be enabled on this page:
◆
ADSL Modulation — ADSL Modulation refers to a frequency-division
multiplexing (FDM) scheme utilized as a digital multi-carrier
modulation method for DSL. A large number of closely-spaced
orthogonal sub-carriers are used to carry data. The data is divided into
several parallel data streams or channels, one for each sub-carrier.
Each sub-carrier is modulated with a conventional modulation scheme
(such as G.lite, ADSL2, etc. or more commonly ADSL2+).
■
G.lite — A standard that defines the more economical splitterless
ADSL connection that transmits data at up to 1.5 Mbps downstream
and 512 Kbps upstream. This ADSL option can be installed without
an on-site visit by the service provider.
■
G.dmt — A standard that defines full-rate ADSL, and utilizes
Discrete Multi-Tone (DMT) signaling to transmit data at up to 8
Mbps downstream and 640 Kbps upstream.
■
T1.413 — ANSI standard that defines the requirements for ADSL
for the interface between the telecommunications network and the
customer installation in terms of their interaction and electrical
characteristics. (The Gateway complies with Issue 2 of this
standard.)