Specifications

7-24
Reference Guide
Model No.
Running Head
WAN Card User Screens and Settings WAN Card
LOCAL LB
The Local Loopback setting allows you to loop the full T1/E1 line back toward the CPE, as
shown in Figure 7-24. This loopback also continues sending CPE data toward 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
.
CH LB
The Channel Loopback setting allows you to loop the data in an individual DS0 time slot on
the WAN link toward the CPE (see Figure 7-25). However, you cannot use this feature to loop
multiple time slots or any portions of them. Refer to the user card chapters for other loopback
options that may allow you to loop part of a time slot or multiple time slots.
The loopback setting can be
off
or
clr
(clear). Clear means the entire 64 kbps clear-channel
time slot will be looped back, but without the Robbed-Bit Signaling data that may normally
be embedded in the time slot. If the WAN is in loopback due to a command from a remote
device, the loopback will be dropped if you choose
clr
.
Figure 7-25. DS0 Time Slot Loopback
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