(9) AN/TTC-48 or small extension node (SEN) switch contains both switching and packet
switching equipment. The communications security (COMSEC) equipment provides secure digital
communications to a command post (CP). The SEN is doctrinally deployed in support of the maneuver
brigades. The SENs come in two versions. The SENs can provide two DCO circuits and net radio
interface (NRI) via the KY-90. We can use CX-11230 cable and line-of-sight (LOS) to interface with
the node center (NC) and LEN. A planner can also interface an NC or LEN using a tactical satellite
(TACSAT) terminal. There are no non-MSE divisions in the Army or National Guard. (See Appendix
A. Figure A-19.)
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