TTC-56

The AN/TTC-56 is a mobile packet switch developed by the U.S. Army. It is a hybrid of a digital circuit switch, a commercial Internet Protocol Cisco 7206 router, digital multiplexer, security and network management equipment. It provides most of the functionality of the AN/TTC-39D, with more advanced data networking, in a smaller and easier-to-deploy package.

Packaging
It is housed in a S-788/G Lightweight Multi-Purpose Shelter, which, along with its power supplies, can be towed by two High Mobility Multipurpose Wheeled Vehicles (HMMWV), rather than the 5-ton trucks required by the AN/TTC-39. One AN/TSM-210 Electronic Shop is provided with each Single Shelter Switch (SSS).

The initial AN/TTC-56 (V)1 has less capacity than the AN/TTC-39, but can be carried by intratheater C-130 Hercules transport aircraft rather than requiring larger aircrft.