ADC EDU-409 - Manual (Page 16)

Loopback Operation 150-409-115-05, Issue 5
10 January 26, 2000 EDU-409 List 1
L
OOPBACK
O
PERATION
When equipped with the EDU-409 List 1, a HiGain system can execute a
number of loopback commands. The loopbacks can be initiated from the ELU
craft port or from the ELU front-panel buttons.
For more information about doubler loopback commands, refer to the
appropriate ELU practices (see
“Product Support” on page 23 ).
All NDU loopbacks are towards the network. All CDU loopbacks are towards
the customer.
Figure 3 is a diagram of a HiGain loopback system.
Figure 3. HiGain Loopbacks