| Cause code | Decimal code | Hexa- decimal code | Meaning | Explanation and action |
| [der] | 01 | 01 | Out of order | The PVC is out of order. Report this condition your Network Administrator. |
| [dte] | 00 | 00 | DTE originated | The logical connection between the originator and the destination was reset. This can occur during normal action, due to a BREAK, lost data, etc. You do not need to do anything. |
| [err] | 05 | 05 | Local procedure error | The logical connection was reset due to communication problems between the local PAD and the network. Contact your Network Administrator if problems persist. |
| [inc] | 17 | 11 | Incompatible destination | The destination address for the logical connection with the originator is in an incompatible format. Contact your Network Administrator. |
| [nc] | 07 | 07 | Network congestion | The logical connection was reset due to heavy network use. This is typically a temporary problem. Contact your Network Administrator if the problem persists. |
| [no] | 15 | 0F | Network operational | The PVC is operational. You do not need to do anything. |
| [ooo] | 29 | 1D | Network out of order | The logical connection was reset due to some problem within the network. This is usually a temporary condition, but this code can indicate a loss of data. Contact your Network Administrator if the problem persists. |
| [rdo] | 09 | 09 | Remote DTE operational | The PVC is operational. You do not have to do anything. |
| [rpe] | 03 | 03 | Remote procedure error | The logical connection was reset due to communication problems between the remote PAD and the network. Contact your Network Administrator if the problem persists. |