Hello everyone！
Today we will discuss the ADSL standard.
ADSL (Asymmetric Digital Subscriber Line) has 3 standards:
ITU G.992.1(G.dmt)
ITU G.992.2(G.Lite)
ANSI T1.413
Both ITU G.922.1 (G.dmt) and ANSI T1.413 are the Standards of full-rate ADSL, ITU G.922.2 (G.Lite) is the standard of ADSL without a signal splitter.
We know ADSL uses the higher frequency carriers to carry data service and the lower frequency carries the analog voice, the data service signal is processed by an ADSL modem and the voice signal is processed by phone. So, we have to use a signal splitter on the copper line and split the lower and higher frequency, and direct them to separate devices.
In G.dmt mode, ADSL needs voice splitters and cannot connect the devices manufactured by different vendors. However, in G.Lite mode, ADSL does not need voice splitters and cuts down the cost of chips and installation.
Features of the low-speed G.Lite
1.G.Lite cuts down costs and needs no splitter.
2.G.Lite uses the DMT line encoding mode that performs the anti-interference well.
3.G.Lite provides asymmetrical rate, 512 kbps for upstream and 1.5 Mbps for downstream.
4.G.Lite extends the transmission distance to 7 km at most.
Through G.Lite don't need the cost of a splitter, but as the data rate is significantly lower than full data rate ADSL, it's not very commonly used while taking bandwidth and market into account.
That's all, welcome to leave a message to discuss.
Thank you!
