Polycom ViewStation EX Administrator's Manual page 64

Administrator's Guide for ViewStation EX, ViewStation FX, and VS4000
3-16
To set up PRI network support:
1. Go to System Info > Admin Setup > Video Network > IMUX > PRI Network
> PRI Setup.
2. Configure these settings:
Setting Description
Line Signalling Specifies the framing format in use.
This setting is configurable for PRI E1, read-only for PRI T1.
CSU Specifies whether this system uses an external or internal
(PRI T1 only) Channel Service Unit (CSU).
Line Build Out For systems using an internal CSU, indicates the output
(PRI T1 only) attenuation in dB. Your service provider can provide you with
these values.
For systems using an external CSU, indicates the length (in feet)
of the RJ-45 cable that connects the PRI network interface module
to the CSU.
Switch Protocol Specifies the Network switch protocol. The available choices are
determined by the system's country settings.
This setting is read-only for PRI E1, configurable for PRI T1.
3. Select Advanced PRI Setup and configure these settings:
Setting Description
Restore Default Resets all values on this screen. This does not affect other PRI
settings.
Numbering Plan Select the appropriate numbering plan for your location, if it differs
from the default.
International Specify the dialing prefix needed for international calls.
Dialing Prefix
Call-by-Call Specifies a code that the system sends to the telephone company
switch to request a special service, if such a code is required.
Consult your telephone service provider to determine the proper
call-by-call value.
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