Monitoring Port Fault Seconds

This describes how to monitor E1/T1 port fault seconds to know the transmission quality of the links on the E1/T1 port in real time.

The E1/T1 port fault seconds are listed in Table 1.

**Table 1** E1/T1 port fault seconds
Name	Meaning
Fault	Fault indicates the BER on the E1/T1 port. Value range: Normal, Serious Fault.
Fault Seconds Count	A second during which one or more than one block error is detected is called block error second. The fault seconds count refers to the number of block error seconds.
Fault Second Rate	The ratio of the fault seconds count to the total seconds of the measurement period.
Serious Fault Seconds Count	Block errors refer to the bit errors during the transmission. The serious fault seconds have the following features: There are more than 30% of block errors in a second. At least one serious disturbance period occurs in a second. The serious fault seconds count refers to the total number of serious fault seconds.
Serious Fault Seconds Count Rate	The ratio of the serious fault seconds count to the total seconds of the measurement period.
Frame Error Number	Frame error number indicates the number of frame errors in a unit of time.
Crc Error Number	Crc error number indicates the number of CRC check errors in a time unit.

On the Trace & Monitor tab page, choose Monitor > Monitor Port Fault Seconds. A dialog box is displayed, as shown in Figure 1.
Figure 1 Ports Fault Seconds Monitoring Parameter dialog box
Set the parameters in the Monitor Setting and View Setting areas, and then click OK.
- Port Frame Error Estimate Chart dialog box is displayed, as shown in Figure 2.
  Figure 2 Results of port fault seconds window (Port Frame Error Estimate Chart)
- Click the Port Fault Seconds Estimate Chart tab. A dialog box is displayed, as shown in Figure 3.
  Figure 3 Results of port fault seconds window (Port Fault Seconds Estimate Chart)
- Click the Port CRC Error Estimate Chart tab. A dialog box is displayed as shown in Figure 4.
  Figure 4 Results of port fault seconds window (Port CRC Error Estimate Chart)
Click Reset to reconfigure the parameters in Figure 2. Click Stop to stop the monitoring task. Click Cancel to quit the monitoring task.