CANOGA PERKINS 2361 T1 Modem - Manual (Page 50)

The EdgeAccess Universal Chassis System
2361 Modem Users Manual 5-8
5.4.7 Local Loopback at Both Ends
When this loopback is activated, it will cause all data transmission from the local user device to
be looped back toward the receive side of that same local device. At the same time, all data
transmissions from the remote unit will be looped back towards the receive side of the remote
device (as shown in Figure 41).
Optical
Link
LIU
Rx
Logic LIU
Mux-
Enc
Demux-
Dec
Demux-
Dec
Mux-
Enc
Fiber Logic Fiber
Tx
Rx
Tx
Figure 40. Local Loopback at Both Ends.