HPlogo X25/9000: X.25/9000 Programmer's Guide > Appendix A  X.25 Packet Formats

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The packets described here are listed below:

  • CALL REQUEST/INDICATION packet

  • CALL ACCEPTED/CONNECTED packet

  • CLEAR REQUEST/INDICATION packet

  • DATA packet

  • INTERRUPT packet

  • INTERRUPT CONFIRMATION packet

  • RESET REQUEST/INDICATION packet

  • RESET CONFIRMATION packet

This appendix does not describe the use and range of possible values for the packets and their fields. It is here to describe how the X.25 applications can access the features defined in the X.25 recommendations.

Several packets are not accessible to X.25 applications. These packets are listed below:

  • DIAGNOSTIC packet

  • REJ (retransmission) packet

  • REGISTRATION packet

  • REGISTRATION CONFIRMATION packet

  • CLEAR CONFIRMATION packet

  • RECEIVE READY packet

  • RECEIVE NOT READY packet

X.25 Level 3 handles these packets according to the X.25 recommendations without the need for any intervention by the user application. X.25 does not support REGISTRATION packets.