How does a modem work for both broadband and dialup connections?

[electroon]

can anyone tell me clearly in broader sense how modem work for both broadband and dialup connections like dialup is only 52kbps wheras broadband has higher connecting as well as download speeds i want to know basics plzzzzzz help thanks in advance

 

[abuantenna]

Re: plz help in basics

Dial-up access
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Dial-up access is an inexpensive but slow form of Internet access in which the client uses a modem connected to the computer and a telephone line to dial the Internet service provider's (ISP) node, a dial-up server type such as the Point-to-Point Protocol and TCP/IP protocols to establish a modem-to-modem link, which is then routed to the Internet. It is currently regarded as legacy technology given the advent of widely available broadband Internet access in the Western world, though many people worldwide still use it simply because they do not have access to a faster connection technology.

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Availability
Dial-up requires no additional infrastructure on top of the telephone network. As telephone points are available throughout the world, dial-up remains useful to travellers. Dial-up is usually the only choice available for most rural or remote areas where getting a broadband connection is impossible due to low population and demand, but services like Direcway, internet accessable by satellite, make this reason obsolete. Sometimes, dial-up access may also be an alternative to people who have limited budgets, though broadband is now increasingly available at lower prices due to market competition.

Dial-up requires time to establish a telephone connection and perform handshaking before data transfers can take place, potentially a source of frustration. In locales with telephone connection charges, each connection incurs an incremental cost. If calls are time-charged, the duration of the connection incurs costs.

Dial-up access is a transient connection, because either the user or the ISP terminates the connection. Internet service providers will often set a limit on connection durations to prevent hogging of access, and will disconnect the user — requiring reconnection and the costs and delays associated with that.

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Performance
Dial-up modems typically have a maximum theoretical speed of 56 kbps (using the V.92 protocol), although in most cases only up to 53 kbps is possible due to overhead. Also, these speeds are the maximum possible; in almost all cases transfer speeds will be lower, averaging about 32 kbps. Other factors such as line noise further reduce achieved transfer rates.

Dial-up connections usually have high latency that can be as high as 200ms or even more, which can make online gaming or videoconferencing difficult, if not impossible. Some games, such as Star Wars: Galaxies and The Sims Online are capable of running on 56K dial-up. Often times, gamers with dial up are disconnected game servers due to the "lag".

Broadband Internet access (mostly via cable and DSL) have been replacing dial-up connections in the last five years. The reason for this replacement is mostly because broadband connections usually have speeds which far exceed the capacity of dial-up, usually in excess of 1 Mbps. An increasing amount of Internet content such as Macromedia Flash, online gaming and streaming media require large amounts of bandwidth. Many computer games released in 2005 (such as Battlefield 2 or Star Wars: Battlefront) are not compatible for online play with dial-up modems. Some of those that can be played with dial-up access, such as Unreal Tournament 2004, latency can be such that it can make the game unplayable. It is likely that an increasing number of games will demand high-speed connections.

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