CCITT Clear and Reset Causes for X.25

AIXLink/X.25 1.1 for AIX: Guide and Reference

This section gives the CCITT meanings for cause codes given in clear-indication and reset-indication packets:

CCITT clear causes.
CCITT reset causes.
CCITT restart causes.
Note: A RESET procedure is invoked to recover a single virtual circuit. A RESTART procedure is invoked when all virtual circuits on a link are to be reinitialized.

The CCITT defines the X.25 clear cause codes as follows:

List of CCITT Clear Causes
Hex	Dec	Meaning
00	00	Originated by the remote X.25 data terminal equipment (DTE).
01	01	Number busy.
03	03	Incorrect facility request.
05	05	Network congestion.
09	09	Out of order.
0B	11	Access barred.
0D	13	Not obtainable.
11	17	Remote procedure error.
13	19	Local procedure error.
15	21	RPOA out of order.
19	25	Reverse charging acceptance not subscribed.
21	33	Incompatible destination.
29	41	Fast select acceptance not subscribed.
80	128	80 through FF not defined by CCITT, but used by SNA.

The CCITT defines the X.25 reset cause codes as follows:

List of CCITT Reset Causes
Hex	Dec	Meaning
00	00	Originated by the remote X.25 data terminal equipment (DTE).
01	01	Out of order.
03	03	Remote procedure error.
05	05	Local procedure error.
07	07	Network congestion.
09	09	Remote DTE operational.
0F	15	Network operational.
11	17	Incompatible destination.
1D	19	Network out of order.
80	128	Originated through FF DTE.