Adtran MX2800 M13 User Manual
6-6
61200290L1-1G
Section 6, Loopbacks
MX2800 M13 Multiplexer User Manual
NOTE
Only one T1 port may engage a CSU Loopback, CSU Loopback w/BERT,
or a Line BERT. If a CSU Loopback, CSU Loopback w/BERT, or a Line
BERT is already active at the time a new CSU Loopback, CSU Loopback
w/BERT, or Line BERT is selected, the former test is terminated, and the
latter test is engaged.
or a Line BERT. If a CSU Loopback, CSU Loopback w/BERT, or a Line
BERT is already active at the time a new CSU Loopback, CSU Loopback
w/BERT, or Line BERT is selected, the former test is terminated, and the
latter test is engaged.
3. DS3 LOOPBACKS
After DS3 Loopback is selected, the menu in
appears. The sections following the figure
provide descriptions and illustrations of the testing options. Select Data Mode to end a test in progress.
Figure 6-8. DS3 Loopback Menu
CAUTION
If IP forwarding is enabled, a user should not perform a DS3 Loopback
from the menus of the far-end (non-LAN end) MX2800. The communi-
cation link is over the DS3. If a loopback is performed, communication
will be lost with the far-end MX2800. If this happens and a loopback
timeout is not active, the user must cycle power to the far-end MX2800 to
cancel the loopback and regain access to the shelf.
from the menus of the far-end (non-LAN end) MX2800. The communi-
cation link is over the DS3. If a loopback is performed, communication
will be lost with the far-end MX2800. If this happens and a loopback
timeout is not active, the user must cycle power to the far-end MX2800 to
cancel the loopback and regain access to the shelf.