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Remote Unit
This option allows the user to enable Remote Unit on the module. The Remote Unit
feature is designed to work only as the remote module of the Local/Remote pair
in
the required Master/Slave configuration. With Remote Unit enabled, the user can
easily perform the following:
•
Test the line integrity of the remote copper port.
•
Use the Local unit to configure all SNMP-configurable features for both units.
•
Use the Local unit to download firmware for both units.
Refer to the
Module LED Functions
section for more information.
By default this feature is set to
Disabled
.
This feature can only be selected by setting the DIP Switches manually.
Loopback Testing
The iMcV-DS3/E3/STS includes two loopback test modes: Coax Loopback and Fiber
Loopback.
The following illustrations show the path that a signal takes in each of the loopback
test modes.
Each loopback performs the following:
•
Redirects the incoming signal back out to the origin while continuing to transmit
downstream.
•
Blocks downstream data from arriving on the looped data line.
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Loopback testing is useful for troubleshooting problems with network connections
should they occur. Looping received data back onto the transmit path helps
determine whether a connection is still valid. Remote loopback tests isolate problems
on the coax run between an iMcV-DS3/E3/STS module and the connected device,
while local loopback tests can isolate problems on the fiber connected to the module.
The following illustrations show a typical progression of loopback tests (i.e. starting by
checking the coax segment at the local side, then the coax segment at the remote
side, etc).
Pseudorandom Bit Sequence (PRBS) Testing
To test using Pseudorandom Bit Sequence, configure the iMcV-DS3/E3/STS modules
for No Loopback, then configure the Transmit Data Source to “Transmit
