TheNetEngine 8000 M14 and M8aremodular high-performance WAN routers. Theirdepth is significantly more than 220 mm. For example:

NetEngine 8000 M8: Approx.600 mmdepth

NetEngine 8000 M14: Larger chassis — deeper than600 mm

A depth of220 mmwould be typical of very compact devices (e.g., small access routers), not these high-capacity modular systems.