Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
168
Appendix C: ISDN Error Codes
The following table specifies the error codes (ISDN cause codes) defined in the Q.931
standard.
Error code (hex) Error code,
bit 8 set to 1
(hex)
Error code
(decimal)
Description
0x1 0x81 1 Unallocated number
0x2 0x82 2 No route to specified transit
network
0x3 0x83 3 No route to destination
0x6 0x86 6 Channel unacceptable
0x7 0x87 7 Call awarded and being delivered
in an established channel
0x10 0x90 16 Normal call clearing
0x11 0x91 17 User busy
0x12 0x92 18 No user responding
0x13 0x93 19 No answer from user (user
alerted)
0x15 0x95 21 Call rejected
0x16 0x96 22 Number changed
0x1A 0x9A 26 Non-selected user clearing
0x1B 0x9B 27 Destination out of order
0x1C 0x9C 28 Invalid number format
0x1D 0x9D 29 Facility rejected
0x1E 0x9E 30 Response to STATUS ENQUIRY
0x1F 0x9F 31 Normal, unspecified
0x22 0xA2 34 No circuit/channel available
0x26 0xA6 38 Network out of order
0x29 0xA9 41 Temporary failure
0x2A 0xAA 42 Switching equipment congestion
0x2B 0xAB 43 Access information discarded
0x2C 0xAC 44 Requested circuit/channel not
available
0x2D 0xAD 47 Resources unavailable,
unspecified
0x31 0xB1 49 Quality of service unavailable
0x32 0xB2 50 Requested facility not subscribed
0x39 0xB9 57 Bearer capability not authorised
0x3A 0xBA 58 Bearer capability not presently
available
0x3F 0xBF 63 Service or option not available,
unspecified
0x41 0xC1 65 Bearer capability not
implemented
0x42 0xC2 66 Channel type not implemented