Sun Microsystems About Serial Port Jumpers, Sun Enterprise 220R Server Owner’s Guide October

Models: 220R

1 208
Download 208 pages 59.74 Kb
Page 110
Image 110
About Serial Port Jumpers

About Serial Port Jumpers

The serial port jumpers on the main logic board (J2604 and J2605) permit the configuration of the system’s two serial ports for either EIA-423 or EIA-232D signal levels. EIA-423 levels are the default standard for North American users. EIA-232D levels are required for digital telecommunication in nations of the European Community.

Configuring jumpers can only be performed by a qualified service provider. For information about configuring the jumpers, about the locations of the serial port jumpers on the main logic board, and about configuration instructions, see the Sun Enterprise 220R Server Service Manual.

For information about how jumpers are marked on the main logic board with jumper addresses, see “About the Main Logic Board Jumpers” on page 81.

82 Sun Enterprise 220R Server Owner’s Guide • October 1999

Page 110
Image 110
Sun Microsystems manual About Serial Port Jumpers, Sun Enterprise 220R Server Owner’s Guide October