IBM 8239 Token-Ring Stackable Hub, Setup And User Manual

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Installing a RI/RO Module
Perform these steps to install a RI/RO Module:
1. Remove power from the 8239 by unplugging the power cord.
2. If a RI/RO Module was not already installed in this 8239, remove the slot cover
and store it in a safe place.
3. Slide the module into the slot along the grooves of the guide rail until it is
seated and flush with the front panel.
4. Tighten the thumbscrews by turning them clockwise.
5. Connect the cables connecting RI on the 8239 RI/RO Module to RO on the
external device and RO on the 8239 RI/RO Module to RI on the external
device.
¹
For the Optical Fiber RI/RO Module:
Figure 3-3. Cabling for the Optical Fiber RI/RO Module
a. Connect the RI receive port to the RO transmit port on the external
device.
b. Connect the RI transmit port to the RO receive port on the external
device.
c. Connect the RO receive port to the RI transmit port on the external
device.
d. Connect the RO transmit port to the RI receive port on the external
device.
¹
For the RJ-45 RI/RO Module:
Chapter 3. Installing Features
3-3