X.25 Packet Types
| Packet Type | DCE → DTE | DTE → DCE | Service | VC | PVC |
|---|---|---|---|---|---|
| Call setup and Clearing | Incoming Call | Call Request | X | ||
| Call Connected | Call Accepted | X | |||
| Clear Indication | Clear Request | X | |||
| Clear Confirmation | Clear Confirmation | X | |||
| Data and Interrupt | Data | Data | X | X | |
| Interrupt | Interrupt | X | X | ||
| Interrupt Confirmation | Interrupt Confirmation | X | X | ||
| Flow Control and Reset | RR | RR | X | X | |
| RNR | RNR | X | X | ||
| REJ | REJ | X | X | ||
| Reset Indication | Reset Request | X | X | ||
| Reset Confirmation | Reset Confirmation | X | X | ||
| Restart | Restart Indication | Restart Request | X | ||
| Restart Confirmation | Restart Confirmation | X | |||
| Diagnostic | Diagnostic | X | |||
| Registration | Registration Confirmation | Registration Request | X |
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