Verilink DCSU 2911 (880-502647-001) Product Manual User Manual
Page 35

DCSU T1 Craft Interface
Verilink DCSU 2911 User Manual
3-13
Table 3-8
Diagnostics Menu Parameters
Command
Description
Options
Ln
Line Loopback (LLB): This option tests the network line from the far-
end node. With Line Loopbacks, incoming signals are looped around
and sent back toward the network. The service provider or far-end
node administrator can then determine if the network line is good.
1) DEACTIVATE
2) ACTIVATE
Pn
Payload Loopback (PLB): This option tests the CSU from the far-end
node. In this case, the data goes through the network line and the
DCSU framer before it is looped back toward the network.
1) DEACTIVATE
2) ACTIVATE
Rn
Local Loopback (RLB): This option tests all of the CSU. Also known as a
Repeater Loopback, the data sent from the data equipment passes
through the CSU up to the network interface and back to the
equipment without passing through the network line.
1) DEACTIVATE
2) ACTIVATE
DCSU
Framer
CPE
T1
DCSU
Framer
CPE
T1
DCS
Framer
CPE
T1
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