Nortel Passport 15000 Preparation Manual page 167

Figure 20
Mesh-IBN isolated bonding network
A type of IBN in which the components of the IBN (for example, equipment
frames) are interconnected to form a mesh-like structure. This may, for
example, be achieved by multiple interconnections between cabinet rows,
or by connecting all equipment frames to a metallic grid (a bonding mat)
extending beneath the equipment. The bonding mat is, of course, insulated
from the adjacent CBN. If necessary the bonding could include vertical
extensions, resulting in an approximation to a Faraday cage. The spacing
of the grid is chosen according to the frequency range of the
electromagnetic environment.
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Passport 15000, 20000 Site Requirements and Preparation Guide
Appendix Grounding topologies 167
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PPT 2819 056 AA
5.2S2