| Management and Diagnostic Console | 
Item  | Description  | 
Exit Code  | Indicates the reason for a lost connection or a terminated training attempt.  | 
  | Following are examples of the typical values that can be represented:  | 
  | ERR_LOF_LIMIT - Retrained due to loss of framing.  | 
  | ERR_LOS_LIMIT - Retrained due to loss of signal.  | 
  | ERR_HI_BER_LIMIT - Retrained due to excessive CRCs.  | 
  | RESTART - System deliberately restarted modem (line search, reprovisioning, or 30-  | 
  | second timeout when waiting for DSL signal.  | 
  | ERR_STATE_TIMEOUT - Modem timed out during training (for example, the modem  | 
  | failed to detect pilot signal at the appropriate time).  | 
  | ERR_ALL_OPTIONS_FAIL - Failed to negotiate a final bitrate with DSLAM.  | 
  | RETRAIN_HIGHER - Proactive retrain in order to obtain a significantly higher connect  | 
  | rate.  | 
Echo  | A measure of the uncancelled echo relative to the background noise on the line.  | 
  | This is an indication of how much the uncancelled echo is affecting DSL  | 
  | performance, rather than an absolute measure of the uncancelled echo.  | 
VXCO | Indicates the difference between the gateway’s and the DSLAM port’s crystal  | 
  | frequency in parts per million (ppm).  | 
Rx Gain  | Indicates the current receive gain settings, which will depend on the length of the  | 
  | DSL line.  | 
INC Tones  | Indicates the number of compensation tones on which impulse noise is detected.  | 
Reviewing Bitloading
The Bitloading pane shows the bits loaded per tone for the upstream (tones 6 to 31) and downstream (tones 32 to 255) spectrum. A single 
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