Code Cause
0 Valid cause code not yet received
1 Unallocated (unassigned) number
2 No route to specified transit network (WAN)
3 No route to destination
4 send special information tone
5 misdialled trunk prefix.
6 Channel unacceptable
7 Call awarded and being delivered in an established channel
8 Prefix 0 dialed but not allowed
9 Prefix 1 dialed but not allowed
10 Prefix 1 dialed but not required
11 More digits received than allowed, call is proceeding
16 Normal call clearing
17 User busy
18 No user responding
20 Subscriber absent
19 no answer from user
21 Call rejected
22 Number changed
23 Reverse charging rejected
24 Call suspended
25 Call resumed
26 Non-selected user clearing
27 Destination out of order
28 Invalid number format (incomplete number)
29 Facility rejected
30 Response to STATUS ENQUIRY
31 Normal, unspecified
33 Circuit out of order
34 No circuit/channel available
35 Destination unattainable
37 Degraded service
38 Network (WAN) out of order
39 Transit delay range cannot be achieved
40 Throughput range cannot be achieved
41 Temporary failure
42 Switching equipment congestion
43 Access information discarded
44 Requested circuit channel not available
45 Pre-empted
46 Precedence call blocked
47 Resource unavailable - unspecified
49 Quality of service unavailable
50 Requested facility not subscribed
51 Reverse charging not allowed
52 Outgoing calls barred
53 Outgoing calls barred within CUG
54 Incoming calls barred
55 Incoming calls barred within CUG
56 Call waiting not subscribed
57 Bearer capability not authorized
58 Bearer capability not presently available
63 Service or option not available, unspecified
65 Bearer service not implemented
66 Channel type not implemented
67 Transit network selection not implemented
68 Message not implemented
69 Requested facility not implemented
70 Only restricted digital information bearer capability is available
79 Service or option not implemented, unspecified
81 Invalid call reference value
82 Identified channel does not exist
83 A suspended call exists, but this call identity does not
84 Call identity in use
85 No call suspended
86 Call having the requested call identity has been cleared
87 Called user not member of CUG
88 Incompatible destination
89 Non-existent abbreviated address entry
90 Destination address missing, and direct call not subscribed
91 Invalid transit network selection (national use)
92 Invalid facility parameter
93 Mandatory information element is missing
95 Invalid message, unspecified
96 Mandatory information element is missing
97 Message type non-existent or not implemented
98 Message not compatible with call state or message type non-existent or not implemented
99 information element nonexistent or not implemented
100 Invalid information element contents
101 Message not compatible with call state
102 Recovery on timer expiry
103 parameter non-existent or not implemented - passed on
111 Protocol error unspecified
127 Internetworking, unspecified
