Polycom DOC2564A manual PRI Settings dialog box, define the following parameters

19In the PRI Settings dialog box, define the following parameters:

Field	Description
Default Num Type	Select the Default Num Type from the list.
	The Num Type defines how the system handles the
	dialing digits. For example, if you type eight dialing
	digits, the Num Type defines whether this number is
	national or international.
	If the PRI lines are connected to the RMX via a
	network switch, the selection of the Num Type is used
	to route the call to a specific PRI line. If you want the
	network to interpret the dialing digits for routing the
	call, select Unknown.
	Default: Unknown
	Note: For E1 spans, this parameter is set by the
	system.
Num Plan	Select the type of signaling (Number Plan) from the
	list according to information given by the service
	provider.
	Default: ISDN
	Note: For E1 spans, this parameter is set by the
	system.
Net Specific	Select the appropriate service program if one is used
	by your service provider (carrier).
	Some service providers may have several service
	programs that can be used.
	Default: None
Dial-out Prefix	Enter the prefix that the PBX requires to dial out.
	Leave this field blank if a dial-out prefix is not required.
	The field can contain be empty (blank) or a numeric
	value between 0 and 9999.
	Default: Blank

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