August 2000
Intermediate to advanced
896 pages
28h 17m
English
book
UNIX System Administration Handbook, Third Edition
by Scott Seebass, Garth Snyder, Evi Nemeth, Trent R. Hein
Content preview from UNIX System Administration Handbook, Third Edition
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7.1 SERIAL STANDARDS
Most serial ports obey some variant of the standard known as RS-232. This standard specifies the electrical characteristics and meaning of each signal wire, as well as pin assignments on the traditional 25-pin (DB-25) serial connector shown in Exhibit A.
Exhibit A A male DB-25 connector
Full RS-2321 is overkill for all real-world situations, as it defines numerous signals that are unnecessary for basic communication. DB-25 connectors are also inappropriately large for use on patch panels and laptop computers. As a result, a number of alternative connectors have come into widespread use. These are described in the section ...
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