The problem is an X.25 attachment cable, V.24. 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 |
| 272 | Any | 07F3160 | Cable, X.25 attachment cable, V.24 (3 m) | Un-P1-Cx-Ty |
| 272 | Any | 53F3927 | Cable, X.25 attachment cable, V.24 (6 m) | Un-P1-Cx-Ty |