ADSL MODEM

ADSL modem or DSL modem is a device used to connect a computer or router to the phone line, to use the ADSL service. Like other types of modem, ADSL modem is a transceiver. DSL is also called a transceiver or atu-R. Singkata NTBBA (Network Termination Broad Band Adapter, Network Termination Broad Band Acces) is also often found in some countries.

Some ADSL modems also manage and share the connection from the ADSL service with several computers. In this case, the ADSL modem to function as a DSL router or residential gateway. Block in the DSL router there is a duty, in the process of framing, while the other blocks perform Asynchronous Transfer Mode Segmentation and Reassembly, IEEE 802.1D bridging and IP routing. A common interface found on the ADSL modem is USB and Ethernet. Although the ADSL modem work in bridge mode and do not need a public IP address, ADSL modem with fixed IP address for management functions such as the IP address 192.168.1.1.

source:
wikipedia