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  | Polycom RMX 1500/2000/4000 Getting Started Guide  | 
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  | Table  | |
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  | Field | Description  | 
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  | Num Plan  | Select the type of signaling (Number Plan) from the  | 
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  | list according to information given by the service  | 
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  | provider.  | 
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  | Default: ISDN  | 
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  | Note: For E1 spans, this parameter is set by the  | 
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  | system.  | 
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  | Net Specific  | Select the appropriate service program if one is  | 
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  | used by your service provider (carrier).  | 
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  | Some service providers may have several service  | 
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  | programs that can be used.  | 
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  | Default: None  | 
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  | Enter the prefix that the PBX requires to dial out.  | |
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  | Leave this field blank if a   | 
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  | required.  | 
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  | The field can contain be empty (blank) or a numeric  | 
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  | value between 0 and 9999.  | 
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  | Default: Blank  | 
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