The problem is an X.25 attachment cable, V.35. 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 |
| 273 | 9117-MMA | 07F3171 | Cable, X.25 attachment cable, V.35 (3 m) | Un-P1-Cx-Ty |
| 273 | 9117-MMA | 53F3928 | Cable, X.25 attachment cable, V.35 (6 m) | Un-P1-Cx-Ty |