3Com 10-Port 100BASE-FX Quick Start Manual page 7

10-Port 100BASE-FX and 20-Port 10/100BASE-TX Fast Ethernet Layer 2 Switching Modules Quick Start Guide
In the 16-slot chassis:
Do not install the module in slot 8 or slot 9. These slots are
reserved for GEN Switch Fabric Modules.
Install the module in slot 1, 2, 3, 4, 5, 6, 7, 10, 11, or 12.
3Com recommends that you do not install the module in slot 13,
14, 15, or 16 because these slots have only one connection to the
GEN Switch Fabric Module.
Table 1, Table 2, and Table 3 list the relationship between the
following:
24-port GEN Switch Fabric Module (SFM) (Model Number 3CB9FG24
or Model Number 3CB9FG24T)
10-port 100BASE-FX FEN Switching Module
Switching module slots in the 7-slot chassis, 8-slot chassis, and 16-slot
chassis, respectively
Table 4, Table 5, and Table 6 list the relationship between the following:
24-port GEN Switch Fabric Module (SFM)
20-port 10/100BASE-TX FEN Switching Module
Switching module slots in the 7-slot chassis, 8-slot chassis, and 16-slot
chassis, respectively
Table 7 and Table 8 list the relationship between the following:
9-port GEN Switch Fabric Module (SFM) (Model Number 3CB9FG9)
10-port 100BASE-FX FEN Switching Module
Switching module slots in the 7-slot chassis and 8-slot chassis,
respectively
Table 9 and Table 10 list the relationship between the following:
9-port GEN Switch Fabric Module (SFM)
20-port 10/100BASE-TX FEN Switching Module
Switching module slots in the 7-slot chassis and 8-slot chassis,
respectively
Use the table information to help select a slot for your module, as well as
administer the system after you have completed the installation.
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