IBM Serial I/O 128P Expandable Subsystem Hardware Installation Manual
3-6
Figure 3-6. Hardware Configuration Illustrating Maximum Distance Permitted Between Expansion Modules
Up to four Expansion Modules can be interconnected at distances of
up to 200 feet (61 m) between one another as shown in Figure 3-6.
When distances between Expansion Modules exceed 200 feet (61m)
or when the peripheral devices are located in a different building, a
Multiplexer Set should be used. Refer to the Serial I/O
Multiplexer
Installation section (Chapter 4) for this information.
