Using “D” Messages for Layer 3• 8-6 •
The H.110 Basic Rate ISDN Board
03 No route to destination
06 Channel unacceptable
07 Call awarded and being delivered in an established channel
10 Normal clearing
11 User busy
12 No user responding
13 User alerting, no answer
15 Call rejected
16 Number changed
1A Non-selected user clearing
1B Destination out of order
1C Invalid number format (incomplete address)
1D Facility rejected
1E Response to STATus ENQuiry
1F Normal, unspecified
22 Circuit/channel congestion
29 Temporary failure
2A Switching equipment congestion
2B Access information discarded
2C Requested channel not available
2F Resource unavailable, unspecified
32 Requested facility not subscribed
39 Bearer Capability not authorized
3A Bearer Capability not presently available
3F Service or Option not available, unspecified
41 Bearer capability not implemented
45 Requested facility not implemented
4F Service or option not implemented, unspecified
51 Invalid call reference value
58 Incompatible destination
60 Mandatory information element is missing
61 Message type non-existent or not implemented
63 Information element non existent or not implemented
64 Invalid information element contents
65 Message not compatible with call state
66 Recovery of timer expiry
6F Protocol error, unspecified
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