IMC Networks E1 User Manual
Page 13
10
Loopback Modes
This feature allows three distinct Loopbacks to be activated either through DIP
Switches or iView
2
Management.
Fiber
Loopback
An analog Loopback at the copper port back to the fiber port. It
copies the received optical signal back to the optical line at the
copper port and continues to drive the copper port, but can be
corrupted by noise on the copper port.
Internal
Fiber
Loopback
A local Loopback at the fiber port. It copies the received optical
signal back to the optical line at a digital point internal to the unit.
It continues to drive the copper port, and normal copper line
monitoring is maintained on the copper port, but the returning
data pattern is not affected.
Copper
Loopback
A remote Loopback to copper port at the fiber driver. It copies
the received copper signal back to the copper port and continues
to drive the fiber port.
By default all Loopbacks are set to OFF for normal data operation.
The following illustrations show the path that a signal takes in each of the Loopback
test modes.
This feature can be controlled by SNMP–Management software (iView
2
) when the
HOST IE-iMcV-T1/E1/J1-LineTerm, TP/SFP module is installed in a managed chassis.