Possible transport layer erors.
| Ok | Everything good so far. |
| WrongHost | Host doesn't exist. |
| WrongConnection | Connection doesn't exist. |
| WrongChannel | Channel doesn't exist. |
| NoResources | No internal resources ro acomplish request. |
| BadMessage | Obsolete. |
| Timeout | Timeout happened. |
| MessageToLong | Sending message too long to fit internal buffers, or user doesn't present buffer with length enouf to contain receiving message. |
| WrongOperation | Operation is not supported. |
| VersionMismatch | Different version of protocol on ends of connection. |
| CRCMismatch | Two ends of connection have different agreement about channels, channels qos and network parameters. |
| DNSFailure | The address supplied to connect to was invalid or could not be resolved. |