User's Manual

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ABOUT ADSL
ADSL MODEM is a broadband Internet access device, which utilizes the high frequency
segment of the phone line to transmit high-speed data without interfering with the voice transmission.
The frequency of ADSL signal is higher than that of voice, so voice and ADSL signal can coexist in
one line by using a splitter to insulate each from the other. ADSL data transfer on the asymmetry way.
The upload speed is up to 1Mbps and download speed is up to 8 Mbps. It is an ideal device for
broadband access.
The 4-port DB120 is a powerful Ethernet ADSL MODEM. It supports PnP and direct access to
Internet with no need to configure. It is easy to install and use. With 4-port switch function, the
DB120 just likes to integrate a HUB device, so it can provide flexible networking solutions and
shared connections for many users. The DB120 can be smoothly updated to support ADSL2/2+.
However, it has powerful software performance such as: remote update and management, multicast
functions, DHCP server and routing capabilities etc. In a word, the DB120 is adaptive to small
LAN’s connection to Internet.
FEATURES and SPECIFICATION
FEATURES
• Support Plug & Play, no need to configure
• Pure bridge mode, Supports up to 12 PVCs
• Maximum upstream transmission rates of 1Mbps.
• Maximum downstream transmission rates of 24Mbps.
• Transmission distance up to 5.5km.
• 4 ethernet ports
• Multicast functions
• Support remote update and management
• DHCP server, NAT, and DMZ
TECHNOLOGY PARAMETERS
ADSL Standards
• ANSI T1.413 Issue2
• ITU-T G.992.1 (G.DMT)
• ITU-T G.992 .3(ADSL2)
• ITU-T G.992 .5(ADSL2plus)
Protocols
Support encapsulation protocols, include:
• RFC2516 PPPoE LLC SNAP / VC MUX
• RFC2364 PPPoA LLC SNAP / VC MUX