MIL-STD-188-176
Management plane
Control plane User plane
Higher layers
Higher layers
ATM adaptation layer
ATM layer
Physical layer
FIGURE 4. B-ISDN Protocol Reference Mode.l
4.2.5.1.2 Control plane . The control plane, with its layered structure, performs the call control and connection control functions; it deals with the signaling necessary to set up, supervise, and release calls and connections. The layered structure is the same as for the user plane.
4.2.5.1.3 Management plane . The management plane provides two types of functions: plane management and layer management.
4.2.5.1.3.1 Plane management . Plane management, which has no layered structure, performs management functions related to a system as a whole and provides coordination between and among all the planes.
4.2.5.1.3.2 Layer management . Layer management handles the operation and maintenance (OAM) information flows specific to the layer concerned. There are five bidirectional information flows: F1, F2, F3, F4, and F5, referred to as OAM flows, defined in
ITU-T I.610, section 3. F1, F2, and F3 OAM flows, which are associated with the physical layer, shall conform to ANSI I.610, sections 4 and 5. F4 and F5 OAM flows are associated with the ATM layer (see 5.1.2.3).
4.2.5.2 Layered structure . The B-ISDN reference model has a layered structure consisting of higher layers, AAL, ATM, and physical layers.
4.2.5.2.1 Higher layers . Higher layers perform the functions related to the individual user services provided. The higher layers, in the control plane, apply to both end systems and networks. Higher layers in the user plane apply only to end
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