Packet Switching and X.25 Networks. APPENDIX B 20
B 2.17.4 Diagnostic Codes
The following standard Diagnostic Codes are defined. Particular network administrations
may use additional codes. The Diagnostic field is optional.
Diagnostic Code byte
high order low order
No additional information to that given in Cause
0 0 0 0 0 0 0 0
P(S) is invalid
0 0 0 0 0 0 0 1
P(R) is invalid
0 0 0 0 0 0 1 0
|
0 0 0 1 0 0 0 0
| This packet type is not valid in the current situation
...to...
|
0 0 0 1 1 1 0 1
This packet type is not allowed
0 0 1 0 0 0 0 0
Packet cannot be identified
0 0 1 0 0 0 0 1
Call attempt on a one-way LCN
0 0 1 0 0 0 1 0
Invalid packet type on PVC
0 0 1 0 0 0 1 1
Packet on LCN not in use (no Call request)
0 0 1 0 0 1 0 0
Use of REJ packet not agreed with administration.
0 0 1 0 0 1 0 1
Not enough fields for packet
0 0 1 0 0 1 1 0
Too many fields for packet
0 0 1 0 0 1 1 1
Invalid GFI
0 0 1 0 1 0 0 0
RESTART with non-zero LCG or LCN
0 0 1 0 1 0 0 1
Incompatible packet type and facility
0 0 1 0 1 0 1 0
Unauthorized Interrupt Confirmation
0 0 1 0 1 0 1 1
Unauthorized Interrupt
0 0 1 0 1 1 0 0
Timer expiry
0 0 1 1 0 0 0 0
Timer expired on Incoming Call
0 0 1 1 0 0 0 1
Timer expired on Clear Indication
0 0 1 1 0 0 1 0
Timer expired on Reset Indication
0 0 1 1 0 0 1 1
Timer expired on Restart Indication
0 0 1 1 0 1 0 0
Could not establish Call
0 1 0 0 0 0 0 0
Facility code not allowed
0 1 0 0 0 0 0 1
Facility parameter not allowed
0 1 0 0 0 0 1 0
Called address not valid
0 1 0 0 0 0 1 1
Calling address not valid
0 1 0 0 0 1 0 0

