The 8-port asynchronous EIA-232/RS-422 adapter might be failing.
Use the following table to determine the part number for the field replaceable unit (FRU).
| CCIN or FFC | Type and model | Part number | Description | Location code |
| 686 | Any | 93H6541 | 8-port asynchronous EIA-232/RS-422 adapter |
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