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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
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