User manual

Atrie DB108Ethernet User Manual
Page 3 Total 17 Pages
1.OVERVIEW
1.1 ABOUT ADSL
An ADSL MODEM is a broadband Internet access device, which utilizes the high frequency segment of
the phone line to transmit high-speed data without affecting the voice transmission. The frequency of the 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 adapts the asymmetry model. It supports upload transmission
speed up to 1Mbps and download speed up to 8 Mbps (24Mbps for ADSL2+). ADSL is an ideal device for
broadband access.
1.2 ABOUT ADSL2/2+
Transmission performance of ADSL2 is improved comparing with the first generation of ADSL. These
improvements are mainly concerned with long distance, anti-line-loss, anti-noise, etc. By doubling the
transmission bandwidth, ADSL2+ has implemented a downlink rate as high as 24 Mbps. Therefore, Internet
applications such as synchronous transmission of multi video stream, online games and huge capacity of
downloading files are made possible.
1.3 FEATURES
1、 Support ANSI T1.413 ISSUE 2、 ITU G.992.1 (G.DMT)、ITU G.992.2 (G.LITE)、ITU G992.3、
ITU G992.5
2、 Web-based configuration and monitoring.
3、 Support up to 4 PVCs.
4、 Routing function.
5、 NAPT、DHCP function.
6、 Maximum downstream transmission rates of 8 Mbps（24Mbps for ADSL2+）.
7、 Maximum upstream transmission rates of 1Mbps
8、 Transmission distance up to 5.5 km.