The AN/TTC-48(V) Small Extension Node (SEN) Switch consists of an S-250()/E shelter transported on a M-1037 HMMWV. The SEN switch contains switching, multiplexing, and communications security equipment which supports the secure digital communications of a command post. The SEN switch is provided in ten versions. The (V)1 provides 26 digital lines and 10-digital trunks and the (V)2 provides 41 digital lines and 13-digital trunks. Both versions provide 2 DC closure commercial office interfaces and a Secure Digital Net Radio Interface KY-90. The SEN switch can interface with a LEN switch or an node center switch directly via CX-11230/G cable, via line of sight or via tactical satellite terminal AN/TSC-85A. Power is provided by a PU-753/M, 10 kW, trailer-mounted, diesel generator set.
