common bonding network (CBN)
The set of metallic components that are intentionally or incidentally interconnected to provide the principal means for effecting bonding and grounding inside a telecommunications building. These components include: structural steel or reinforcing rods, metallic plumbing, ac power conduit, cable racks, and bonding conductors. The CBN is connected to the exterior grounding electrode system. Synonym integrated ground plane. [After T1.320-1994]