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Back to Back Connections
Bad Line Configuration
Cable Pin-outs
Line Debugging
Possible Dead Line
X.25 Diagnostic Codes

X.25 Diagnostic Codes

Diagnostic DecimalValue
No Additional Information 0

1

2

15

  invalid P(S)
  Invalid P(R)
   
Packet Type Invalid 16
  For state r1 17
  For state r2 18
  For state r3 19
  For state p1 20
  For state p2 21
  For state p3 22
  For state p4 23
  For state p5 24
  For state p6 25
  For state p7 26
  For state d1 27
  For state d2 28
  For state d3 29
    31
Packet Not Allowed 32
  unidentifiable packet 33
  call on one-way logical channel 34
  invalid packet type on a permanent virtual circuit 35
  packet on an unassigned logical channel 36
  REJECT not subscribed to 37
  packet too short 38
  packet too long 39
  invalid General Format Identifier 40
  Restart or Registration packet with nonzero logical channel identifier 41
  packet type not compatible with facility 42
  unauthorized INTERRUPT CONFIRMATION 43
  unauthorized INTERRUPT 44
  unauthorized REJECT 45
    47
Timer Expired 48
  for INCOMING CALL (or DTE timer expired for CALL REQUEST) 49
  For CLEAR INDICATION (or for DTE Timer expired or retransmission count surpassed for CLEAR REQUEST 50
  For RESET INDICATION (or for DTE Timer expired or retransmission count surpassed for RESET REQUEST 51
  For RESTART INDICATION (or for DTE Timer expired or retransmission count surpassed for RESTART REQUEST 52
  For call deflection 53
    63
Call Setup, Call Clearing, or Registration Problem 64
  Facility/Registration code not allowed 65
  Facility parameter not allowed 66
  invalid called DTE address 67
  Invalid calling DTE address 68
  invalid facility/registration length 69
  incoming call barred 70
  no logical channel available 71
  call collision 72
  duplicate facility requested 73
  nonzero address length 74
  nonzero facility length 75
  facility not provided when expected 76
  invalid CCITT-specified DTE facility 77
  maximum number of call redirections or call deflections exceeded 78
    79
Miscellaneous 80
  improper cause code from DTE 81
  non octet aligned 82
  inconsistent Q-bit setting 83
  NUI problem 84
    95
Not assigned 96
    111
International Problem 112
  remote network problem 113
  international protocol problem 114
  international link out of order 115
  international link busy 116
  transit network facility problem 117
  remote network facility problem 118
  international routing problem 119
  temporary routing problem 120
  unknown called DNIC 121
  maintenance action (Note 5) 122
    127
Reserved for DTE-defined diagnostic Information 128
    143
Timer Expired or Retransmission count surpassed 144
  for INTERRUPT 145
  for DATA packet transmission 146
  for REJECT 147
    159
DTE-Specific Signals 160
  DTE operational 161
  DTE not operational 162
  DTE resource constraint 163
  Fast select not subscribed 164
  Invalid partially full DATA packet 165
  D-bit procedure not supported 166
  Registration/Cancellation confirmed 167
    175
Not Assigned 176
    223
OSI Network Service Problem 224
  disconnection (Transient condition) 225
  disconnections (permanent condition) 226
  connection rejection - reason unspecified (Transient condition 227
  Connection rejection - reason unspecified (permanent condition 228
  connection rejection - quality of service not available (transient condition 229
  connection rejection - quality of service not available (permanent condition) 230
  connections rejections -NSAP unreachable (transient condition) 231
  connections rejections -NSAP unreachable (transient condition) 232
  reset - reason unspecified 233
  reset - congestion 234
  connection rejections - NSAP address unknown (permanent condition) 235
    239
Higher Layer Initiated 240
  disconnection - normal 241
  disconnection - abnormal 242
  disconnection -incompatible information in user data 243
  connection rejection - reason unspecified (Transient condition 244
  Connection rejection - reason unspecified (permanent condition 245
  connection rejection - quality of service not available (transient condition 246
  connection rejection - quality of service not available (permanent condition) 247
  connections rejections -incompatible information in user data 248
  connection rejections -unrecognizable protocol identifier in user data 249
  reset-user resynchronization 250
    255