Zhone Technologies IMACS-200 - Manual (Page 135)

WAN Ports 5-5
WAN ports WAN port User Screens and Settings
LINE LB
The Line Loopback setting loops the T1 line back towards the network, as shown in Figure
5-3. This loopback also continues sending the incoming data toward the CPE. Choosing on
allows you to test the end-to-end T1 circuit path from the far end. Choosing off disables the
loopback and restores the normal signal path in both directions. If the WAN is in loopback due
to a remote device, the loopback will be dropped if you choose on.
Figure 5-3.Line Loopback
LOCAL LB
The Local Loopback setting allows you to loop the full T1 line back toward the CPE, as shown
in Figure 5-4. This loopback also continues sending CPE data towards the network. Choosing
on allows you to test the local system. Choosing off disables the loopback and restores the
normal signal path in both directions. If the WAN is in loopback due to a command from a
remote device, the loopback will be dropped if you choose on
Figure 5-4.Local Loopback