Specifies the application that the LogicalLines of this Port will provide.
NONPRI indicates that all of the LogicalLines will have a permanent Cct
number and will not be used to dial to varying destinations. PRI
indicates that some or all of the ds0s of this port will be used for switched
Ccts using ISDN. MIXED indicates that some of the ds0s are being used for
switched Ccts using ISDN and some are being used for non PRI permanent
connections for other applications such as leased lines or Frame Relay.