Administrator’s Guide for Polycom HDX Systems
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3. Select and configure these settings:
PRI Video
Number
Specifies the ISDN number assigned to this system.
Outside Line
Dialing Prefix
Specifies the ISDN dialing prefix used to call outside the
network.
BONDING:
Calling Endpoint
Uses the Original
ISDN Number
Specifies the use of a bonding standard. Incoming bonded
calls will use the original number received to connect all
remaining lines required for the call.
Setting Description
Setting Description
Line Signaling Specifies the framing format in use.
This setting is configurable for PRI E1, read-only for PRI T1.
External CSU
North America only
Specifies whether this system uses an external or internal
Channel Service Unit (CSU).
Line Build Out
PRI T1 only
For systems using an internal CSU, indicates the output
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.
Your ISDN service provider can tell you which protocol your
network uses. If you later change the Country setting, the
PRI switch protocols available may also change, and you
may be prompted to configure a different PRI switch
protocol.
ISDN Voice
Algorithm
Specifies which voice algorithm (aLaw or uLaw) is used for
ISDN voice calls.
Do not change this setting unless you experience audio
issues in all ISDN voice calls.
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