Instruction manual

8
Receive LIU Termination (Line Termination)
This option allows the user 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 the user 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 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 the user 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 the user 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.