The following terms are used in this chapter to explain concepts such as dial pools and the ports that can use them, and the bandwidth management strategies.

bandwidth management	A process that applies static bandwidth, dynamic bandwidth, or a combination of these to provide a port with the bandwidth it needs to meet current requirements. See also virtual pipe.
dial pool	The pool of dial paths that can be dynamically bound to any properly configured port.
disaster recovery threshold	The minimum of the normal bandwidth threshold and the total amount of configured leased line bandwidth that is assigned to the port. See also normal bandwidth threshold.
dynamic binding	The association of a path in the dial pool to a port when it is needed.
dynamic path	A path that can be used by more than one port. You create a dynamic path by unbinding it from its port. A dynamic path is stored in the dial pool. Characteristics of dynamic paths are as follows:
	Initially, dynamic paths are not bound to any port, but dynamically bind to make an outgoing call. To receive an incoming call, a dynamic path receives the call while still in the dial pool, and then is bound to a port.
	Dynamic paths can bind to different ports without user action, but only one port can bind at a time.
	Once the path becomes inactive, it unbinds from the port and becomes available for other ports.
normal bandwidth threshold	Bandwidth threshold defined by the -PORT NORMalBandwidth, BODTHreshold, BODIncrLimit, and DialSamplPeriod parameters.
port	A port is a logical interface used by the software to represent a connection to a network.
	When the DOD path is up, the bridge/router routes the packets as expected in the normal NCP and SPX1 connection processes.
static binding	The association or binding of a path to a port as defined at system initialization time or by user configuration.
static path	A path is assigned (bound) to one port and can be used only by one port; a static path cannot be shared. By default, all paths are static at system initialization time.
virtual path	A path used by the NETBuilder II bridge/router to represent multiple logical paths multiplexed over a single interface. ISDN B, ISDN PRI, and DS0 channels delivered by channelized T1/E1 or switched-56 are presented as distinct virtual paths. A virtual path can be used as a static or dynamic resource.
virtual pipe	A term that describes a port of variable bandwidth.
virtual port	A port that is not associated with a physical interface. Virtual ports allow configuration of multiple destinations through a single interface.