Oc3/Stm-1 Uni Module Loopbacks - 3Com 3C63400-3AC-C - PathBuilder S700 Switch Reference Manual

Using Loopbacks 223
Figure 169 illustrates the loopbacks for the E3 module.
Figure 169 E3 Loopback Options
E3 Interface
Network Side
Network Card
Local
Line
Payload
OC3/STM-1 UNI Module The OC3/STM-1 UNI module supports the following loopbacks:
Loopbacks
Local Card—Loops the transmit OC3/STM-1 output on the receive side. All cells
coming from the OC3/STM-1 port card are looped through the backplane and
back to the OC3/STM-1 port card. The transmitted data will continue to go on the
output.
Network Line—Loops the OC3/STM-1 received data back on the output side
after the digital data has been recovered.
Figure 170 illustrates the loopbacks for OC3.
Figure 170 OC3/STM-1 Loopback Options
OC3 Interface
Network Side
Local Card
Network Line
Payload