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Polycom EX Manual De Usuario

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Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
88
www.polycom.com
Network Configuration 
The following paragraphs give information about configuring the 
ViewStation EX, ViewStation FX, and VS4000 systems for the ISDN 
network.
On a PRI T1 Network: Configuring the CSU
If you use an external CSU, you must specify the following 
information on the PRI Setup screen (System Info > Admin Setup 
> Video Network > IMUX > PRI Network > PRI Setup
):
1.
In the CSU field, select External.
2.
In the Line Buildout field, select the length of the cable that 
connects the PRI network interface module to the CSU.
You can also configure the T1 PRI network interface module to act 
as a CSU. To do this, the external power supply must be connected.
To use the T1 PRI network interface module as an internal CSU, you 
must specify the following information on the PRI Setup screen 
(System Info > Admin Setup > Video Network > IMUX > PRI 
Network > PRI Setup
):
1.
In the CSU field, select Internal.
2.
In the Line Buildout field, select an appropriate dB setting. The 
telephone company usually determines the dB value by 
measuring the characteristics of the line. If an external CSU was 
previously used, use the setting selected for that CSU. 
Otherwise, start with 0.