|An incoming call is cleared with cause 0x00 (or 0x80), diagnostic 0x80.
|The application that is supposed to accept the call is not running,
|Load the application
|The called NUA is unknown or has been configured incorrectly.
|Reconfigure either the calling application or the called application with the correct NUA.
|An outgoing call is made (i.e. a Call Request packet is sent), but there is no response (i.e. no Call Connected or Clear Indication packet is received). Eventually the call times out.
|The channel assignments (LCNs) are incorrect.
|Find out what the channel assignments should be and correct them in the configuration. refer to the CHANNELS command in the setup.x25 file.