The AN/VSC-7 is a vehicle-mounted terminal which normally acts as a net control station (NCS) and can control up to 15 subscribers. The NCS uses the basic AN/PSC-3 R/T unit reconfigured to form an AN/VSC-7. The vehicle's electrical system provides power for operation. The NCS can control as many as 15 terminals in a network. Because it is a single-channel system, it is configured with data needs being satisfied by some terminals and secure voice needs being satisfied by other terminals. The call mode operation is a unique calling function. It allows the sending station to alert a distant unit with a visual indication. It also allows an optional 5-second audible alarm. The NCS can transmit or receive any one of 15 selective calls. It can also receive all conference calls regardless of the selective control setting on the NCS applique front panel. The NCS selects any one of the 15 units operating in its net for selective call transmissions. Conference calls will be received by all units operating in the net with their controls set to receive selective call messages.
Army units such as Special Forces groups and Ranger battalions deploy manpack TACSAT terminals worldwide. The physical environment does not restrict these deployments. The terminals are lightweight and compact, and they can be moved easily by one person. The NCSs are normally vehicle-mounted. They are usually operated from a forward operating base by Special Forces groups or from a battalion headquarters by Ranger battalions. A network can be a small deployment (three to four terminals with one AN/VSC-7/NCS) or a larger deployment (more than one AN/VSC-7/NCS).