There are numerous brands supplying ADSL routers. These include the following: Airlive, Apple, Asus, Belkin, Billion, Cisco, Draytek, Netgear and NetComm.
"One router that has an average rating of 4.5 stars with over 6,500 reviews is the TP-Link Cable/DSL Wired Router. Another brand that is well known and gets good reviews is Linksys. D-Link also has high marks and is a brand that has a track record for quality."
Traditional ADSL will only work over copper. There are newer services, like FiOS from Verizon that is technically ADSL but it runs over Fiber. I am a Provisoiner of Broadband Services (ADSL, Cable, T-1, Frame, EVDO, etc...) I run into Fiber issues all the time. Even if it is copper to your nieghborhood and then fiber, or vice versa, traditional ADSL will not work.
Cisco 877 is a router with an ADSL interface and four ethernet ports. Simply speaking it is a rather intelligent version of a usual ADSL modem (or ADSL router) most of us have at home. 877 provides features geared towards small business use from dynamic routing to IPv6, tunelling etc. 877 also uses the standard operating software which is same as many other high end Cisco devices. This makes it practical to deploy 877 in an ISP (Internet Service Provider) environment so that a unique platform can be deployed from Core level to the end-users. It also has a wireless version, called 877W, which offers wi-fi capabilities on top of everything a standard 877 does.
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
No, a cable modem cannot be used for an ADSL connection. Cable modems are designed to work with cable internet services, which use coaxial cables, while ADSL (Asymmetric Digital Subscriber Line) requires a DSL modem that connects via telephone lines. Each type of modem is specifically engineered for its respective technology, making them incompatible with each other.
ADSL and VDSL
Wireless routers connect computers to the internet without using a cord. This is for convenience. These routers allow you to move about anywhere within a certain range and stay connected to the internet without be bound and tangled up with a cord.