OPTIONAL FEATURES11-15Edition OneXC1000 Service The DPF LED is lit when a drive-module power failure was detected. The TER LED is lit when a terminator error exists. The enhanced-small-device-interface (ESDI) terminators are in the wrong position andneed to be changed to an alternate position. The file card cannotaccess the drives when this condition exists. The A LED is lit to show that the file card is part of redundant card set A. The B LED is lit to show that the file card is part of redundant card set B. The ACT LED is lit when the file card is active. The SBY LED is lit when the file card is in standby mode.11.6.4 Status CodesThe Standby-Redundancy feature provides new status-log entries. Refer tosection 7.3 for information about the XC1000 status-log entries for standbyredundancy.The location codes for the card slots in a redundant XC1000 are differentfrom the location codes for the card slots in a nonredundant XC1000.Redundant card-slot-location codes are shown in Table 11-3.Table 11-3. Standby Redundancy Card-Slot-Location Codes.LocationCodeRedundant Card Nonredundant CardCabinet 106 System File A side System File01 System File B Side Message File02 Message File A Side Monitor03 Message File B Side CPU04 Monitor Spare05 ACP ACPCabinet 246 Spare Spare41 Spare Spare42 CPU A Side Spare43 CPU B Side Spare11.7 HIGHLIGHTS The optional ACP feature allows a single XC1000 to support multiple,asynchronous data-link connections with multiple-switch access (MSA)software. This feature supersedes the MSLU feature. The ACP/MTA feature supersedes the MTA feature. Both allow up toseven system-management terminals to access maintenance andadministration menus on a single XC1000.SECTION 11.7 – 11.8
