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Figure
3-4. Cabling for the RJ-45 RI/RO Module
a. Connect RI on the 8239 to RO on the external device.
b. Connect RO on the 8239 to RI on the external device.
Attention:
¹
Be sure that you connect RI/RO cables at both ends before enabling these
interfaces. Any of these interfaces that are not going to be used should be
administratively disabled.
¹
Use caution when implementing a network with more than one RI/RO
interface per stack. Multiple RI/RO connectors between two ring segments
or between two 8239 Model 1s in the same stack can cause undesirable
results, such as a division of the ring into two independent segments.
6. Provide power to the 8239.
The RI/RO ports are disabled by default. To enable them, issue the ENABLE
RING_IO command or the UNWRAP RING_IO command; these commands are
equivalent.
3-4
8239 Setup and User’s Guide
Summary of Contents for 8239 Token-Ring Stackable Hub
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