File AP72-06 Issue 6
Page 5
SYSTEM ERROR RESPONSES
Unsuccessful calls will normally give one of the following responses in the display. In addition
the error number is also displayed.
DISPLAY MESSAGE
REASON FOR FAILURE
ERROR NUMBERS
USER BUSY
User Engaged
17
NETWORK BUSY
Network Engaged
42
NO ANSWER
Called Number does not answer
18,19
INVALID NUMBER
Number not recognised
28
OUT OF ORDER
Network or Destination out of order
27,38,41
INCOMPATIBLE
Called Number not suitable for DATA
88
PROTOCOL ERROR
Protocol Error
111
CLEARED
Any other cause
ALL OTHERS
LIST OF ERROR NUMBERS PRESENTED BY THE TERMINAL ADAPTER
0S Bus not responding 47Resources unavailable
1Unallocated number 49Quality of service unavailable
2No Route to specified network 50Requested facility not subscribed
3No route to destination 57Bearer capability not authorised
4Channel unacceptable (BT only) 58Bearer capability not available
6Channel unacceptable 63Service or option not available
7Call awarded and being delivered 65Bearer capability not implemented
in an established channel 66Channel type not implemented
16Normal call clearing 69Requested facility not implemented
17User busy 70Only restricted digital information
18No user responding bearer capability is available
19No answer from user 79Service or option not implemented 21Call rejected 88Incompatible
destination
22Number changed 111Protocol error, unspecified
26Non-selected user clearing
27Destination out of order
28Invalid number format
29Facility rejected
30Response to Status Inquiry
31Normal, unspecified
34No circuit/channel available
38Network out of order
41Temporary failure
42Switching equipment congestion
43Access information discarded
44Requested circuit/channel not
available
