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Chapter 1 - Getting to Know DSL-2120/2120W
Your DSL-2120/2120W integrates high-speed 10/100Mbps auto-negotiating LAN
interface(s), USB port and a high-speed ADSL port. The DSL-2120/2120W is perfect for
making LAN-to-LAN connections to remote networks and for high-speed Internet browsing.
The DSL-2120/2120W provides lightning-fast Internet access to multiple users by combining
Direct Subscriber Line (DSL) and Network Address Translation (NAT).
The Web-based Graphical User Interface (GUI) allows easy management and is not
dependent on any single operating system to use.
1.1 Features of the DSL-2120/2120W
High Speed Internet Access
The DSL-2120/2120W ADSL 2/2+ router support downstream transmission rates of up to
24Mbps and upstream transmission rates of 1Mbps.
PPPoE Support (RFC2516)
Point-to-Point Protocol over Ethernet (PPPoE) emulates a dial-up connection. It allows
your Internet Service Provider (ISP) to use its existing network configuration with newer
broadband technologies such as ADSL. The PPPoE driver on the DSL-2120/2120W is
transparent to the computers on the LAN. Computers see only Ethernet and are not aware of
PPPoE; you don't have to manage PPPoE clients on individual computers.
Network Address Translation (NAT)
Network Address Translation (NAT) allows the conversion of an Internet protocol (IP)
address used within one network, such as a private IP address used in a LAN, to a different IP
address known within another network, such as a public IP address used on the Internet.
Universal Plug and Play (UPnP)
Using the standard TCP/IP protocol, the DSL-2120/2120W and other UPnP enabled
devices can dynamically join a network, obtain an IP address and convey its capabilities to
other devices on the network.
10/100M Auto-negotiation Ethernet/Fast Ethernet Interface
Auto-negotiation allows the DSL-2120/2120W to detect incoming transmissions' speeds
and make necessary adjustments without manual intervention. It also allows data transfer
rates of either 10 Mbps or 100 Mbps, in either half-duplex or full-duplex mode, depending on
your Ethernet network.
Dynamic DNS Support
With Dynamic DNS support, you can have a static hostname alias for a dynamic IP
address, allowing the host to be more easily accessed from other locations on the Internet.
Proprietary & Confidential
Revision: V1.0
Page 6 of 86
Apr. 23, 2008
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