Card Technology - IBM AS/400e User Handbook Manual

• System Console/Communications Adapter
– #5540 System Console on twinaxial workstation controller
• #4746 PCI Twinaxial IOA
• #9771 Base PCI 2-Line WAN with Modem
– #5544 System Console on Operations Console
• #0367 Operations Console PCI Cable
• #4745 PCI Two Line WAN IOA
• #9771 Base PCI 2-Line WAN with Modem
• Uninterruptible Power Supply (UPS)
An external UPS is recommended to protect the system unit and any external
components against utility power outages. The AS/400 CPM/UPS Models 9910-080,
9910-140, and 9910-180, which were previously used with the 9406 Model 170, can also
be used with the Model 270. The Model 270 does not include an internal battery.
An external UPS, combined with abnormal IPL improvements in OS/400, provides an
equivalent level of power protection and fast recovery in the event of power failure.
Continuously Powered Main store (CPM) is not supported on the Model 270.

Card Technology

PCI architecture offers advantages in flexibility over non-AS/400 system structures. Prior
AS/400 models required input/output processors (IOPs) to be in specific slots in the system
and expansion towers. If high performance in a particular area was required, a single
input/output adapter (IOA) may have been assigned to a single IOP. This resulted in
unassigned slots in the tower, leaving valuable slots empty.
With the implementation of new PCI technologies, the Model 270 provides more flexibility in
the placement of IOPs and IOAs. This results in more efficient use of card slots, potentially
resulting in a lower cost of implementation. Increased flexibility of configuration adds a
degree of complexity to the configuration process. A full understanding of configuration rules
associated with the various I/O features of the 270 system is required.
The fundamental bus architecture of the AS/400 system is unchanged when using PCI
adapters. The AS/400 IOP continues to off load the main processor; isolate the host from
adapter and network errors; and manage, configure, and service the adapters.
The following functions do not have equivalent function PCI cards for the Model 270:
• ASCII Adapter
• V.25 Autocall cable
• Select standby mode
AS/400e server 270
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AS/400e server 270