© Copyright IBM Corp. 1997 - 2004. All rights reserved. 259Draft Document for Review October 18, 2004 5486Towr.fmChapter 15. Towers, racks, andhigh-speed linkTo house components beyond the capability of the system unit, towers areadded. Expansion towers are offered for new or migrated PCI features. Rackmounting options are available for select systems and towers. Towers andrack-mounted devices are connected to each other using high-speed links (HSL)(HSL or HSL-2/RIO-G).For information about the software required to support towers and input/output(I/O) on iSeries servers, refer to Informational APAR II13440 on the Web at:http://www.ibm.com/support/us/For information about planning for iSeries racks, including PDU specifications,the number of PCI cards supported, and the number of EIA units, refer to the“iSeries Racking” presentation at:http://www.ibm.com/servers/eserver/support/iseries/planningMigration Towers are not supported by the Model 520, 550, 570, 595, 800, 810,825, 870 and 890 models and are withdrawn from IBM marketing. Refer to“Migration towers” on page 315 for a brief description of the #5033, #5034,#5035, and #5077 Migration Towers. Refer to the IBM Eserver iSeries andAS/400e System Builder, SG24-2155, for detailed information.15
