METRObility Optical Systems R380-SS - Manual (Page 19)

Radiance Multi-Rate Line Card 19
Dual-Port Loopback
In this mode, data on both ports of the multi-rate line card are looped back to
their sending devices. Dual-port loopback is configurable through hardware or
software by enabling loopback on Port 1 and Port 2 simultaneously.
Local Multi-Rate
Line Card
Remote Multi-Rate
Line Card
Local
Device
Remote
Device
Port
1
Port
1
Port
2
Port
2