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7. ISDN Events and Errors
345
Error Name Hex Value
(Decimal)
Q.931 Code and Description
OUTGOING_CALL_BARRED 0x234
(564)
Cause 52
Outbound call barred
INCOMING_CALL_BARRED 0x236
(566)
Cause 54
Incoming call barred
BEAR_CAP_NOT_AVAIL 0x23A
(570)
Cause 58
Bearer capability not presently
available
SERVICE_NOT_AVAIL 0x23F
(575)
Cause 63
Service or option not
available, unspecified
CAP_NOT_IMPLEMENTED 0x241
(577)
Cause 65
Bearer capability not
implemented
CHAN_NOT_IMPLEMENTED 0x242
(578)
Cause 66
Channel type not implemented
FACILITY_NOT_IMPLEMENT 0x245
(581)
Cause 69
Requested facility not
implemented
INVALID_CALL_REF 0x251
(593)
Cause 81
Invalid call reference value
CHAN_DOES_NOT_EXIST 0x252
(594)
Cause 82
Identified channel does not
exist
INCOMPATIBLE_DEST 0x258
(600)
Cause 88
Incompatible destination
INVALID_MSG_UNSPEC 0x25F
(607)
Cause 95
Invalid message, unspecified
MANDATORY_IE_MISSING 0x260
(608)
Cause 96
Mandatory IE missing