Dial-up connection

Dial-up Internet access is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line. The user's computer or router uses an attached modem to encode and decode information into and from audio frequency signals, respectively.

In 1979, Tom Truscott and Steve Bellovin, graduate students for Duke University, created an early predecessor to dial-up Internet access called the USENET. The USENET was a UNIX based system that used a dial-up connection to transfer data through telephone modems.[1] Dial-up Internet has been around since the 1980s via public providers such as NSFNET-linked universities and was first offered commercially in July 1992 by Sprint.[2] Despite losing ground to broadband since the mid-2000s, dial-up may still be used where other forms are not available or the cost is too high, such as in some rural or remote areas.

Dialup internet service is a service that allows connectivity to the internet through a standard telephone line. By connecting the telephone line to the modem in your computer and inserting the other end into the phone jack, and configuring the computer to dial a specific number provided by your internet service provider (ISP) you are able to access the internet on your computer.

Dial up internet service is provided through several ISP. The majority of internet service providers give you a set of telephone numbers either national or local that allows you to dial into a network that feeds into the internet. This allows you to receive and send email, search the World Wide Web, participate in chat rooms and plenty of other features the web has to offer.

In order to get a dial up internet service a person must definitely have a computer and even more important a modem. There are different types of modems, and most of them are inexpensive to purchase. You can have an internal modem installed in a free slot of your computer, or you can have an external modem that's hooked up to the computer through cables. A telephone line is linked to the modem.

The modem whether external or internal is controlled by software on the computer. With Microsoft Windows operating system that software is the Network Connection utility which allows you to connect to the internet. How? In the Network Connection utility you have to set up ISP profile so that the modem knows what phone number to dial so that you can connect to the internet.

Once you have found an internet service provider and joined you must choose a password and username. Why? When the modem dials the phone number you are given by your ISP, a connection is made, and then information is swap between the modem and the remote server. A remote server is the computer and related software that is established to handle users who want to access a network remotely. The username and password you choose for the modem allows access to the dial up gateway to the internet. The gateway to the internet is a network that allows entry into another network.

If you are looking for an inexpensive internet service dial up is the way to go. Not only is it the cheapest but also the slowest type of access you can get. Since the bandwidth is limited it will take some time for the modem to send and receive information. It will be slow loading web pages, listening to music and watching videos online. There are all kinds of software available that can help speed up your dial up internet.

With dial up internet you cannot use the phone and search the web at the same time. How come? Remember while one end of the telephone is linked to the modem the other end is in the phone outlet. There are internet services available that allows you to use the phone at the same time and be online.

So as you can see dial up internet has its pros and its cons. If you are looking for a inexpensive internet service and don't mind not being able to talk on the phone and use the web at the same time then dial up is definitely for you!

Dialup modem

News wire services in the 1920s used multiplex devices that satisfied the definition of a modem. However, the modem function was incidental to the multiplexing function, so they are not commonly included in the history of modems. Modems grew out of the need to connect teleprinters over ordinary phone lines instead of the more expensive leased lines which had previously been used for current loop–based teleprinters and automated telegraphs.

In 1941, the Allies developed a voice encryption system called SIGSALY which used a vocoder to digitize speech, then encrypted the speech with one-time pad and encoded the digital data as tones using frequency shift keying.

Mass-produced modems in the United States began as part of the SAGE air-defense system in 1958 (the year the word modem was first used[1]), connecting terminals at various airbases, radar sites, and command-and-control centers to the SAGE director centers scattered around the United States and Canada. SAGE modems were described by AT&T's Bell Labs as conforming to their newly published Bell 101 dataset standard. While they ran on dedicated telephone lines, the devices at each end were no different from commercial acoustically coupled Bell 101, 110 baud modems.

The 201A and 201B Data-Phones were synchronous modems using two-bit-per-baud phase-shift keying (PSK). The 201A operated half-duplex at 2,000 bit/s over normal phone lines, while the 201B provided full duplex 2,400 bit/s service on four-wire leased lines, the send and receive channels each running on their own set of two wires.

The famous Bell 103A dataset standard was also introduced by AT&T in 1962. It provided full-duplex service at 300 bit/s over normal phone lines. Frequency-shift keying was used, with the call originator transmitting at 1,070 or 1,270 Hz and the answering modem transmitting at 2,025 or 2,225 Hz. The readily available 103A2 gave an important boost to the use of remote low-speed terminals such as the Teletype Model 33 ASR and KSR, and the IBM 2741. AT&T reduced modem costs by introducing the originate-only 113D and the answer-only 113B/C modems.