Appendix A. NLI Messages

Appendix A. NLI Messages
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Table A-1 lists the downstream messages and associated outgoing X.25 packets.

Table A-1. Downstream Messages and Associated Outgoing X.25 Packets

NLI Message	X.25 Packet
N_CI	Connect Request
N_CC	Connect Response
N_Data	Data
N_DAck	Data Acknowledgment
N_EData	Expedited Data
N_EAck	Expedited Data Acknowledgment
N_RI	Reset Request
N_RC	Reset Response
N_DI	Disconnect Request

Table A-2 lists the upstream messages and associated incoming X.25 packets.

Table A-2. Upstream Messages and Associated Incoming X.25 Packets

NLI Message	X.25 Packet
N_CI	Connect Indication
N_CC	Connect Confirmation
N_Data	Data
N_DAck	Data Acknowledgment
N_EData	Expedited Data
N_EAck	Expedited Data Acknowledgment
N_RI	Reset Indication
N_RC	Reset Confirmation
N_DI	Disconnect Indication
N_DC	Disconnect Confirmation

Note: The NLI PVC messages PVC Attach and PVC Detach do not have corresponding X.25 packets.

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