AT&T 3B2/300 Technical Reference Manual page 85

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Domestic AT&T XM/405$/900$ (ED-3T010-30)
Major Assemblies
Figure 2-13 shows a typical domestic AT&T XM/405S/900S. The major assemblies include a
power supply, a bridge controller, and three hard disk drives. The major assemblies are listed below:
• Power Supply Unit (TRW #095-10064-02) set for 115 volt AC operation
• Bridge Controller (WP91205,L3)
• Three 135-megabyte (total of 405 megabytes) Hard Disk Drives, KS-23371,L13
or
Three 300-megabyte (total of 900 megabytes) ESDI Hard Disk Drives, KS-23371,L31 and L33.
EQUIPMENT DESCRIPTION 2-61