Maintenance Object Repair Procedures
555-233-123
10-704 Issue 4 May 2002
Table 10-258 describes 3 of the important ICC connections.
Without the ICC properly attached, the system cannot function as a High or
Critical Reliability system.
Changing SAT terminal connections
Duplication Interface circuit pack A controls and monitors the same environment
leads that the Maintenance/Tape Processor does in a PPN a system without High
or Critical Reliability. Duplication Interface circuit pack A also supports the serial
channel to the PPN administration terminal in a High or Critical reliability PPN.
The administration terminal connects to Duplication Interface circuit pack A via a
connector on the back of carrier A labeled DOT. At any time, the administration
terminal may be disconnected from Duplication Interface circuit pack A and
connected directly to the active Maintenance/Tape Processor by attaching the
administration terminal to the connector marked TERM on the active carrier. This
connection should only be made if the administration terminal fails to function
since a problem with the Duplication Interface circuit pack A may be present.
Schematic
Figure 10-28 on page 10-705 depicts the interconnection of the Duplication
Interface circuit packs with the rest of the system. The dotted lines in Figure 10-28
on page 10-705 show the logical serial channel rather than actual physical
implementation of the serial channel. For clarity, the UARTs are not shown. The
following circuit pack abbreviations are used in Figure 10-28 on page 10-705:
■ DUPINT for Duplication Interface circuit pack
■ PI for Processor Interface
■ Net Pkt for Network Controller/Packet Interface
Table 10-258. ICC signals from the Duplication Interface circuit pack
Lead Description
Tone-Clock Indicates which Tone-Clock circuit pack is active
SPE Select Switch State Indicates the position of the SPE-select switch
Emergency Transfer Indicates whether Emergency is on or off in the PPN
cabinet
To Next Page
Loading...
