3com S330 Manuale Utente

Cells dropped—The number of idle/unassigned cells encountered and dropped 
on the interface.

Cells with HCS errors—The number of header check sequence (HCS) errored 
cells encountered on the ATM interface.

You can view both performance statistics and ATM statistics for the E3 UNI 
module.

To view E3 UNI performance statistics, follow these steps:

1 From the Card Statistics menu, select [9] E3 UNI to open the E3 UNI Performance 

Management menu. This menu is similar to the OC3/STM-1 Performance 
Management menu, shown earlier in Figure 147.

2 Select [1] E3 UNI Performance Monitoring to open the E3 Performance 

Management menu. The E3 Performance Management menu provides the 
following information:

SEFS—The number of severely errored framing seconds (SEFSs) encountered by 
the E3 interface.

LCV—The number of line coding violations (LCVs) encountered by the E3 
interface.

LES—The number of line errored seconds (LESs) encountered by the E3 interface.

To view E3 ATM statistics, follow these steps:

1 From the Card Statistics menu, select [9] E3 UNI to open the E3 Performance 

Management menu.

2 From the E3 Performance Management menu, select [2] ATM Statistics. ATM cell 

statistics are cell counts since the last counter reset. On the E3 ATM Statistics 
screen, you can reset the counter by entering [c].

The E3 ATM Statistics menu provides the following information:

Cells Received—The number of ATM cells received on the E3 since the last user 
reset of this counter.

Cells transmitted—The number of ATM cells transmitted on the E3 since the last 
user reset of this counter.

Cells dropped—The number of idle/unassigned cells encountered and dropped 
on the interface.

Cells with HCS errors—The number of header check sequence (HCS) errored 
cells encountered on the ATM interface.

You can view HDLC, Frame Relay, and ATM VC statistics for the serial port. To view 
serial port statistics, follow these steps:

1 From the Card Statistics menu, shown earlier in Figure 146, select [5] SIM. The SIM 

Statistics menu appears.

2 Select [1] Port 1.

3 Select the option corresponding to the type of statistics you want to view.