Q.850 Cause Codes

  • 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
  • 100Invalid information element contents
  • 101Message not compatible with call state
  • 102Recovery on timer expiry
  • 103parameter non-existent or not implemented – passed on
  • 111Protocol error unspecified
  • 127Internetworking, unspecified

If you like our services, get in touch to start a project together

Savings Calculator

Please fill your information in fields below

* This field is mandatory
* This field is mandatory
* This field is mandatory
* This field is mandatory

Yes I would like to receive email from Star Telecom about the latest in technology news, white papers, webcasts, events and more. Please check to subscribe. You may opt out at any time

PRIVACY STATEMENT: Please note we will never sell, rent or loan your email address to any outside company or organization.