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ISUP Release Cause

    ISUP RELEASE CAUSE
    S.No Rel Cause Value ITU-T Description
    1 1 Unallocated (unassigned) number
    2 3 No route to destination
    3 5 Misdialled trunk prefix (national use)
    4 16 Normal call clearing
    5 17 User busy
    6 18 No user responding
    7 19 No answer from user (user alerted)
    8 20 Subscriber absent
    9 21 Call rejected
    10 22 Number changed
    11 27 Destination out of order
    12 28 Invalid number format (address incomplete)
    13 31 Normal, unspecified
    14 34 No circuit/channel available
    15 38 Network out of order
    16 41 Temporary failure
    17 42 Switching equipment congestion
    18 44 Requested circuit/channel not available
    19 47 Resource unavailable, unspecified
    20 50 Requested facility not subscribed
    21 57 Bearer capability not authorized
    22 63 Service or option not available, unspecified
    23 65 Bearer capability not implemented
    24 69 Requested facility not implemented
    25 88 Incompatible destination
    26 95 Invalid message, unspecified
    27 102 Recovery on timer expiry
    28 111 Protocol error, unspecified
    29 127 Interworking, unspecified