2. MSE Systems.
a. The MSE network at division can be described as a nodal switch system. Node centers are deployed from
the division signal battalion to form a backbone network to provide geographic and area coverage. The division
signal battalion currently has the capability to deploy a maximum of four node centers.
b. Large extension nodes (LEN) and small extension nodes (SEN) extend from the node centers to provide
units and command posts with access to the network. The DIVARTY HQ will be provided wire access into the
MSE network through a small extension node switch (SENS)(V2) and associated line-of-sight (LOS) radio
terminal (AN/TRC-190). The equipment and soldiers are from an extension platoon from an area signal company
within the division signal battalion. Figure 2-10, page 2-16, is anexample of a division MSE network. Four node
centers, represented by the symbol of a triangle inside a circle, are deployed. SENs, symbolized by a circle with a
X inside a rectangle, represent divisional units. The DIVARTY is represented by a cannon ball inside the symbol
for tracked vehicles. As illustrated in the diagram, DIVARTY is connected to a node center, represented by the
solid line drawn from the DIVARTY SEN to a node center, to access the MSE DIVARTY network.
c. The SEN normally consists of
(a) One AN/TTC-48 (V1) or (V2) SENS. The SENS provides local switching and network access
for either 26 subscribers (V1) or 41 subscribers (V2).
(b) A line-of-sight (LOS) AN/TRC-190 (V1) radio assemblage.
d. Figure 2-11, page 2-17, illustrates a typical SEN (V1) configuration depicting the placement of the
equipment and its interconnect with other pieces of equipment. Under MSE, users (not division signal battalion
personnel) are responsible for installing and operating the subscriber terminal equipment to the distribution boxes.
The users connect their subscriber cables and telephones to the J-1077 distribution boxes set up by the signal
team. A call is received at the SEN, where it is sent to a LOS radio by either radio link or cable. From the LOS
radio, the signal is transmitted to a node center and the routing process continues, sending the call to its
destination. Figure 2-12, page 2-18, illustrates a SEN (V2) with the capacity to handle network switching for up
to 41 subscribers. Signal personnel must closely supervise and monitor the installation of the subscriber
terminals, whatever they may be (telephones, facsimile, teletypewiter, etc), to ensure that the proper connections
have been made to obtain reliable communications over the MSE network.