Huawei OptiX OSN 3500 Routine Maintenance page 32

Type of loopback

Software loopback: set via NMS;

Hardware loopback: set using tail fiber and self-loop cable manually.

Inloop: route signals from XC back to XC;

Outloop: route signals away from XC back to interface port.

SDH NE equipment
Line Inloop Outloop
Tributary
Loopback Operation
Outloop
Inloop
Tributary Tributary
Line
Line
Tributary
SDH NE equipment
Inloop Non-loopback Outloop
Line
Tributary
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