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84 Interphase Corporation
Configuring the CSU
If you have selected an American switch type, you can edit
CSU properties for the board. DS1 is the long haul
configuration used for connecting the board to a T1/PRI line.
If the board is connected directly to the line in a standard DS1
configuration, the board’s internal CSU must be activated for
each PRI port. (For more information about line connections,
see T1/PRI Line on page 27.)
The following table describes DS1 options that can be edited:
Option Description
Activate the
CSU
A direct DS1 connection between the board and the
network’s T1/PRI line requires a CSU.
• Select Activate the CSU to activate the board’s
internal CSU for the port.
• Deselect Activate the CSU to deactivate the board’s
internal CSU for the port.
The CSU facility is protected by a password. You must
enter the password the first time you select Activate the
CSU.
Network Line
Build Out
The Network line build out compensates for the signal
attenuation due to the length of the cable between the
board and the switch.
Four values are available (expressed in dB):
• 0
• 7.5
• 15
• 22.5.
Select the value indicated by your Telco. If this
information is not available, use 0 dB.