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Receive LIU Termination (Line Termination)
This option allows you to set the receive termination. This is used to properly
terminate cables in order to prevent signal reflections which can cause signal
degradation.
Transmit Data Source
This option allows you to set the module to send normal data (default) or to send
specific test-patterns of data to determine problems along the cable as a diagnostic
tool. The user can set the module to send a pseudorandom bit sequence (PRBS)
(2
15
-1 for E1 and 2
20
-1 for T1), an alternating ones and zeros, or an unframed all ones
code, depending on the diagnostic requirements.
Jitter Attenuator Select
This option allows you to select Jitter Attenuation on the UTP transmit or receive side.
This decreases jitter in the data stream which increases data reliability.
NOTE
The jitter attenuator must always be enabled on the transmit side of the copper
line.
Loopback Selection
This option allows you to set the Loopback location on the module. Loopback is a
diagnostic tool that enables the user to test the integrity of the line by allowing the
data to be looped back. The following independent loopback locations are included
on the module:
•
Analog Loopback - Set this switch on the Remote module to loop the data back
from the remote copper port (refer to the
Remote Copper Loopback Mode
section for more information).
•
Local Loopback – Set this switch on the Remote module to loop the data back
from the remote fiber port (refer to the
Remote Fiber Loopback Mode
section for
more information).
•
Remote Loopback - Set this switch on the local module to loop the data back
from the local fiber port (refer to the
Local Fiber Loopback Mode
section for
more information).
Refer to the
Loopback Testing
section for application examples of the loopback testing
modes.
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