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  The following table lists diagnostic codes from a remote MPE XL system that
  could be received on the local system.
  Table B-2 X.25 Diagnostic Codes From a Remote Host
  
| Diagnostic Code | 
Meaning/Cause |  
  | 48 | Inactivity timer expired. |  
  | 65 | Facility not allowed. |  
  | 70 | Incoming call barred. |  
  | 160 | DTE specific for example: restricted access, unknown circuit,
      unknown local facility, circuit in use, destination not allowed, or
      reverse charge call not accepted. |  
  | 161 | DTE operational |  
  | 162 | DTE not operational. Level 3 out of order, or Level 2 out of
      order. |  
  | 163 | Network congestion. |  
  | 166 | D-bit procedure not supported |  
 
  
 
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