
ISDN Cause and Diagnostic Codes 209
AT&T 5ESS (North America)
Hex Cause
01 Unallocated (unassigned) number
02 No route to specified network
03 No route to specified transit network
10 Normal clearing
11 User busy
12 No user responding
13 User alerting, no answer
15 Call rejected
16 Number Changed
1B Destination out of order
1C Invalid number format (incomplete number)
1D Requested facility rejected
1E Response to status enquiry
1F Normal, unspecified
22 No channel available
23 Call queued
29 Temporary failure
2A Network congestion
2B Access information discarded
32 Requested facility not subscribed
34 Outgoing calls barred
36 Ingoing calls barred
3A Bearer capability not presently available
3F Service or option not available, unspecified
41 Bearer capability not implemented
42 Channel type not implemented
45 Requested facility not implemented
51 Invalid call reference value
52 Identified channel does not exist
58 Incompatible destination
5B Transit network does not exist
60 Mandatory information element is missing
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