guides:virtual_modem
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guides:virtual_modem [2019-11-18 02:00] omolini [About this site] |
guides:virtual_modem [2019-11-18 23:41] omolini |
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| In this four-part tutorial we will build a Raspberry Pi that will act as a serial modem to a legacy computer which will enable a straightforward connection to Internet using a pre-existing serial port on any computer with support for [[wp>Point-to-Point Protocol|PPP]], this includes all Windows computers starting from Windows 3.0 and early Macintosh classics. But PPP support is not strictly required, and even simple serial terminals can connect to the Internet using Linux as a login host. In other words we'll use a Raspberry to convert a serial connection to an Ethernet connection. When all is said and done, your legacy computer will think it's calling a real [[wp>Internet Service Provider]] and establishing an Internet link with them! Your Raspberry Pi will just be telling your computer what it wants to hear, and is actually the one providing access to the Internet using your pre-existing Internet connection. | In this four-part tutorial we will build a Raspberry Pi that will act as a serial modem to a legacy computer which will enable a straightforward connection to Internet using a pre-existing serial port on any computer with support for [[wp>Point-to-Point Protocol|PPP]], this includes all Windows computers starting from Windows 3.0 and early Macintosh classics. But PPP support is not strictly required, and even simple serial terminals can connect to the Internet using Linux as a login host. In other words we'll use a Raspberry to convert a serial connection to an Ethernet connection. When all is said and done, your legacy computer will think it's calling a real [[wp>Internet Service Provider]] and establishing an Internet link with them! Your Raspberry Pi will just be telling your computer what it wants to hear, and is actually the one providing access to the Internet using your pre-existing Internet connection. | ||
| - | {{ :guides:pics:netscape-navigator-4-0-header-2.png?nolink |}} | + | {{ :guides:pics:vmodem-header.png?nolink |}} |
| The [[.:virtual_modem:script|Virtual Modem script]] will not only allow you to connect your old computer to the Internet, it will allow you to use the serial connection to login to the console of the Raspberry Pi or fake [[wp>Bulletin board system|BBS]] phone calls for example. The VModem script was designed to be modular, and allows you to assign your own Linux scripts to specific phone numbers, accessed with standard Hayes "ATD12345"-style commands, and the scripts will be able to do whatever you would like them to do. I will be writing more specific tutorials about these functions at a later time, so stay tuned! | The [[.:virtual_modem:script|Virtual Modem script]] will not only allow you to connect your old computer to the Internet, it will allow you to use the serial connection to login to the console of the Raspberry Pi or fake [[wp>Bulletin board system|BBS]] phone calls for example. The VModem script was designed to be modular, and allows you to assign your own Linux scripts to specific phone numbers, accessed with standard Hayes "ATD12345"-style commands, and the scripts will be able to do whatever you would like them to do. I will be writing more specific tutorials about these functions at a later time, so stay tuned! | ||
| + | {{ :guides:pics:win95-dialup-setup-11-nomark.png?nolink |}} | ||
| My goal is to have a Raspberry Pi simulate a Standard 56K modem. Your client computer will be able to communicate with it over serial, and through the Raspberry, connect to the Internet. The baud rate can be changed to your liking. I've tested the virtual modem at the following symbol rates: 9600, 19200, 38400 and 57600 baud. | My goal is to have a Raspberry Pi simulate a Standard 56K modem. Your client computer will be able to communicate with it over serial, and through the Raspberry, connect to the Internet. The baud rate can be changed to your liking. I've tested the virtual modem at the following symbol rates: 9600, 19200, 38400 and 57600 baud. | ||
| - | {{ :guides:pics:vmodem-header.png?nolink |}} | + | {{ :guides:pics:netscape-navigator-4-0-header-2.png?nolink |}} |
| This guide is useful for anyone who would like to do PPP networking experimentation or have a computer connect to the Internet without a network card. It could also be useful for anyone who would like to experiment with a Virtual Modem. Since pretty much every IBM compatible computer has a RS-232 serial port, technically you could connect any computer to the Internet, or any other network, as long as there is a way to use dial-up PPP. Windows 3.0, 3.1 and 3.11 will need an extra program called Trumpet Winsock, but Windows 95 and later operating systems have built-in Dial-up networking. | This guide is useful for anyone who would like to do PPP networking experimentation or have a computer connect to the Internet without a network card. It could also be useful for anyone who would like to experiment with a Virtual Modem. Since pretty much every IBM compatible computer has a RS-232 serial port, technically you could connect any computer to the Internet, or any other network, as long as there is a way to use dial-up PPP. Windows 3.0, 3.1 and 3.11 will need an extra program called Trumpet Winsock, but Windows 95 and later operating systems have built-in Dial-up networking. | ||
guides/virtual_modem.txt · Last modified: 2022-12-17 19:37 by omolini
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