(b) Automatic network operation requires that a timing standard be established for
the network. The AN/TTC-39 has a master timing generator that can supply the timing clock. In
the current hybrid network (analog and digital), one circuit switch has to be established as a
master for timing purposes.
(c) Glare occurs when two circuit switches attempt to access the same trunk at the
same time. Class-marking for glare allows one switch to receive and the other switch to initiate a
call.
(d) Signaling modes affect both analog and digital operation. The two basic types
of signaling are in-band and out-of-band. The key item is to ensure that switches are using the
same channel for signaling.
PART D - SUMMARY
1.
MSE Equipment and Capabilities. MSE equipment consists of switching equipment,
transmission equipment, network control facilities, and mobile subscriber access.
a. Switching equipment.
(1) The node switch provides automatic switching capability for the MSE system. It
is the hub of the MSE network.
(2) The large extension node switch (LENS) provides wire line service for up to 176
subscribers. It supports large command posts (CP), such as the corps support command
(COSCOM).
(3) The small extension node switch (SENS) provides wire line service for up to 26
or 41 subscribers. It supports smaller CPs, such as an engineer battalion headquarters.
b. Transmission equipment. Line-of-Sight Multichannel Radio Terminal AN/TRC-190
provides the primary point-to-point radio connection between various nodes of the MSE network
and interconnects the node switch with the LENS, SENS, and radio access units (RAU). The
AN/TRC-190 uses the AN/GRC-224 radio set.
c. Network control facilities.
The system control center (SCC) is the automated
management hub for the MSE system.
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