
4-6 Access System Centum Series User Manual
Payload Loop
The Payload Loop is useful for looping back any testing initiated by the
other end of a point-to-point circuit, such as Payload, Serial Port, or
DSX-1 BERTs or any externally generated testing.
It is also useful for looping back Serial Port or DSX-1 testing initiated by
any remote location in an Integrated Access, Fractional-T1 circuit.
WHEN TESTING IS COMPLETED, BE SURE TO TURN THE LOOP
“OFF”.
Figure 4-3 Payload Loop diagram
Diagnostics
_NI/DSX-1 Port
ag. Menu,
DOWN
to
display:
NI/DSX-1 Diag.
PAYLD Loop:_On
OWN
and
ELECT
as
o display:
1.536 Mbps
1.544 Mbps
Payload Loop ON
Payload
Networ
Interface
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