FreeBSD Handbook
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# Chapter 27 Serial Communications

# 27.1 Synopsis

UNIX® has always had support for serial communications as the very first UNIX machines relied on serial lines for user input and output. Things have changed a lot from the days when the average terminal consisted of a 10-character-per-second serial printer and a keyboard. This chapter covers some of the ways serial communications can be used on FreeBSD.

After reading this chapter, you will know:

- How to connect terminals to a FreeBSD system.

- How to use a modem to dial out to remote hosts.

- How to allow remote users to login to a FreeBSD system with a modem.

- How to boot a FreeBSD system from a serial console.

Before reading this chapter, you should:

- Know how to configure and install a custom kernel.

- Understand FreeBSD permissions and processes.

- Have access to the technical manual for the serial hardware to be used with FreeBSD.

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