Frequency Division Multiplexing (FDM)
ADSL.
3g is mobile internet and adsl is a type of home internet so adsl is better
Dialup is slow, ADSL is fast
Asymmetric Digital Subscriber Line(ADSL)
Splitter
ADSL and VDSL
ADSL (Asymmetric Digital Subscriber Line) divides the bandwidth of a twisted pair cable using frequency division multiplexing. It allocates lower frequencies for voice calls, allowing traditional telephone services to operate simultaneously with internet data. Higher frequencies are reserved for upstream and downstream data transmission, with downstream speeds typically being greater than upstream speeds, hence the term "asymmetric." This separation enables efficient use of the same line for both voice and data services without interference.
For troubleshooting tips for your adsl modem you can read about go to support.hubris.net/dsl/troubleshooting.html. For more help you can go to www.eternalmart.com/tag/adsl-troubleshooting-speed/.
Speed is the difference between HDSL and ADSL. HDSL has high upload and download speeds whereas ADSL has a slow upload speed coupled with a high download speed.
ADSL is simply a version or 'flavour' of DSL. The 'a' refers to asymmetric, meaning 'not the same'. Hence, ADSL usually has different downstream and upstream rates (e.g. 1536/256 is a common speed of ADSL available in Australia, where downstream the link speed is 1536kbps and upstream is 256kbps).
I believe your Internet Service Provider must sell you this option. Once you pay for it your router should be working at the speed of ADSL. I am currently using ADSL, but will be going to a faster speed.
Yes, you have to have an ADSL splitter before your router to route the packets from the Internet. There are numerous router which have an inbuilt ADSL supporting varying speeds like 54Mbps etc etc. You can choose one from them if you do not want to have separate ADSL and Router installed separately.