Allied Telesis AT-S65 - Manual (Page 82)

Chapter 5: Working With Line Cards
82
In mode 5 (Figure 39), loopback on the port side only, input to the port
(SFP) side loops back and also propagates to the WDM (line) side as
shwon in cases B and C..
Figure 39. Mode 5: Loopback on the Port Side Only
CWDM
Transciever
SFP
Line
Side
Port
Side
CWDM
Transciever
SFP
Line
Side
Port
Side
CWDM
Transciever
SFP
Line
Side
Port
Side
CWDM
Transciever
SFP
Line
Side
Port
Side
X X
X
X
X X
X X
X
X
X X
Legend
No optical signal
Optical signal present
Case B:
Port side: optical
signal received
Line side: optical
signal received Case C:
Port side: optical signal
received
Line side: no optical
signal received Case D:
Port side: no optical
signal received
Line side: no optical
signal received Case A:
Port side: no optical
signal received
Line side: optical signal
received