Special Systems
In some instances, security and/or connectivity requirements preclude the use of ordinary structured cabling. Where cable is difficult or impossible to install, a range of cableless alternatives, such as 802.11x wireless and Free Space Optics are available. For Department of Defense networks, special security considerations dictate design and installation parameters.

- 802.11a/b/g/n wireless
- Free Space Optics
- SIPRNET and JWICS
- Video coaxial