Correct Answer and Feedback
AN/TTC-46 or LEN switchboard has basically the same configuration as the NCS.
The LEN doctrinally is deployed in support of the DISCOM. It can support a total of
164 subscribers. (page 1-4, para 2b(7))
AN/TTC-47 or NCS is the hub of the MSE node. (page 1-4, para 2b(8))
The AN/TTC-39A can service 600 or 672 trunks depending on the model on hand.
The AN/TTC-39A provides, for the first time, the capability of analog and digital
services. (page 1-4, para 2b(5))