c. The SEN normally consists of the following:
(1) One AN/TTC-48 (V1) or (V2) small extension node switch
(SENS).
The SENS provides local switching and network access for
either 26 subscribers (V1) or 41 subscribers (V2).
(2) A LOS AN/TRC-190 (V1) radio assemblage.
(3) Support vehicle and generators.
d. Figure 2-12, page 2-12, illustrates a typical SEN (V1)
configuration depicting the placement of the equipment and its
interconnect with other pieces of equipment.
Under MSE, users, and
not the 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 2-13, page 2-13,
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, etc), to ensure that the proper
connections have been made to obtain reliable communications over the
MSE network.
e. Mobile subscribers in the MI battalion will access the MSE
network via user-owned and operated mobile subscriber radiotelephone
terminals (MSRT).
The MSRT consists of two major components:
the
digital
subscriber
voice
terminal
(DSVT)(TSEC/KY-68)
and
the
receiver/transmitter RT-1539. Functional characteristics of the MSRT
include:
(1) Secure automatic voice/data communications.
(2) Discrete addressability.
(3) Automatic reaffiliation during movement.
(4) Internal communications security (COMSEC).
(5) Operates over a frequency range of 30 to 88 MHz.
(6) A 15-kilometer (9.3-mile) range.
f. The MSRT allows the user to dial up and communicate with any
discretely-addressed MSE subscriber.
The mobile subscriber accesses
the network via the radio access unit (RAU) deployed and operated by
the signal battalion.
RAUs are located in the vicinity of
SS0125
2-10
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