3com S330 ユーザーズマニュアル

C

HAPTER

 5: P

ATH

B

UILDER

 S330 D

IAGNOSTICS

 

AND

 P

ERFORMANCE

 S

TATISTICS

The E3 module supports the following loopbacks:

Local Card—Loops the transmit E3output on the receive side. All cells coming 
from the E3 port card are looped through the backplane and back to the E3 port 
card. The transmitted data will continue to go on the output.

Network Line—Loops the E3 received data back on the output side after the 
digital data has been recovered.

Network Card—Loops the E3 received cell payload back toward the line output.

Figure 141   E3 Loopback Options

The following loopbacks are available for the CBR module:

Network Line—Loops the T1-DSX received data back on the output side after the 
digital data has been recovered.

Local Card—Loops the transmit T1-DSX output on the receive side; the 
transmitted data will continue to go on the output.

Network Card—Loops the T1-DSX received payload back toward the line output.

Figure 142   CBR Loopback