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Page Title: Description of the TCF
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TM 11-5895-1012-10
the facilities (except the quality assurance (QA) equip-
lamps in each bay. The bottom of bay 1.11 mounts the
ment) are located in TCF, room 5A910 (fig. FO-12).
black -48 vdc power system; consisting of two 48 vdc
There are three bays of QA equipment in the Electron-
power supplies, an alarm panel, and a fused power dis-
ic Maintenance Room (para 3-10). As shown in figure
tribution panel. Bays 1.12 and 1.19 each contain an
FO-12, the TCF consists of two rows of equipment
order-wire panel. Bays 1.13 and 1.15 have writing
bays, a red cable vault, and red and black ground and
shelves with AN/FGG-80 t&typewriter sets mounted
power distribution boxes. In addition the room con-
on the shelves. One 24 vdc power supply is in bay 1.16
tains Crypto equipment, modems, voice frequency car-
with a second unit in bay 1.17. Bay 1.16 contains the
rier telegraph (VFCT) equipment and etc. Equipment
24 vdc meter panel, alarm panel and fused power dis-
rows No. 1 and No. 2 are described in paragraphs a and
tribution panel. Bay 1.17 also contains the black 6 vdc
b below. Sample bay elevations are shown in figures
power system; consisting of two power supplies (with
3-1, 3-2, and 3-3.
alarms), meter panel, and fused power distribution
a. Description of Equipment Row No. 1
panel. Bay 1.21 includes the black indicating equip
(1) General. Equipment row No. 1 contains 21
ment; consisting of a MAJOR/MINOR alarm panel,
bays of patch and test equipment and four bays of
audible alarm panel and two crypto ancillary unit/corn-
DCL/MOLINK equipment. Bays 1.22 through 1.24
mon control unit (CAU/CCU) alarm panels.
(DCL/MOLINK) are covered in (C) PDEP
(7) Black Digital Test Bays. Bays 1.14 and 1.18
11-5895-832-14(2). Row No. 1 is called the black
are the black digital test bays. The bays are similar in
equipment row, because bays 1.1 through 1.21 connect
configuration. Each bay contains a 150 vdc meter
to unsecure or encrypted circuits.
panel, a 601 Data Transmission Test Set, HP-180BR
(2) Black VF and Digital IDF Bays. Bay 1.1 con-
Oscilloscope with connection panel, AN/GGM-15(V)
&b of two intermediate distribution frame (IDF)
Telegraph Test Set, INT panel with 48 lamps, and a
bays. Bay 1.10 consists of three IDF bays. Each bay
writing shelf.
b. Description of Equipment Row No. 2
contains a front door to allow access to a patch cord
type cross connect matrix. The IDF's are similar and
(1) General. Equipment row No. 2 contains 20
bays of equipment and four bays of IDF patch cord
discussed in paragraph 3-11.
(3) Black VF Patch Bays. Bays 1.2, 1.3, 1.4, 1.6
cross connect matrixes. The four IDF bays are all
and 1.7 are the VF patch bays. Each of these bays con-
numbered 2.21. Row No. 2 is called the red equipment
tains eight 2-wire audio patch panels and an interbay
row, because the circuits may carry secure information
in clear test. Bays 2.1 through 2.20 are described in (2)
(INT) patch panel. Bay 2.1 has a R-390 radio receiver
in the bay below the patch panels. Bays 1.3 and 1.7
through (6) below.
(2) Special Intelligence Bay 2.1. SI bay 2.1 is
each have a 60 station voice order wire panel, that are
furnished and maintained by the telephone company.
isolated from the rest of the TCF. The bay contains a
Bays 1.4 and 1.6 have dual speaker panels and
color video monitor at the top with eight video
AM-911/FG audio frequency amplifiers mounted
distribution amplifiers, and three 75 ohm patch
below the patch panels.
panels. Between the monitor and amplifiers there are
(4) Black VF Test Bay 1.5. This bay contains vari-
two universal dc patch panels (digital patch panels)
and three 2-wire audio patch panels (VF patch panels).
ous test equipment. There is a writing shelf with a mis-
The bay also has its own IDF consisting of two rows of
cellaneous (MISC) and INT panel above the shelf. In
patch cord cross connect matrixes.
addition there are two test equipment connection
(3) Red Digital Patch Bays (fig. 3-1). The red
panels. Test equipment without rear test lead con-
digital patch bays are bay 2.3 through 2.6, 2.8 through
nectors are connected to the MISC panel through the
2.11 and 2.13 through 2.16. Each of these bays has a
test equipment connection panels.
(5) Video Monitor and Station Clock Bays 1.8 and
15 vdc meter mounted in a panel at the top of the
bay. Below the meter panel there are six digital patch
1.9. Bay 1.8 has two video monitors at the top, used to
panels and a INT panel with 48 lamps. Bays 2.11, 2.13
monitor the TCF door and outside hall. A panel with a
and 2.14 each contain a writing shelf used to mount
push-button switch for unlocking the door is below the
AN/FGC-80 teletypewriter sets. Each bay has blank
monitors. There are five TWINAX wide band patch
panels below the patch panel. The blank panels may be
panels in the bay. The remainder of the bay is used to
removed to allow installation of equipment as re-
mount test equipment. Bay 1.9 is a TDS-2 Station
Clock Bay.
(4) Red Digital Test Bays (fig. 3-2). Bays 2.2, 2.7
(6) Black Digital Patch Bays. Bays 1.11, 1.12,
and 2.12 are the red digital test bays. Each of these
1.13, 1.15, 1.16, 1.17, 1.19, 1.20 and 1.21 are the
test bays is used to mount test and monitor equipment.
black digital patch bays. Each bay has a 15 vdc
In addition there is an INT panel with 48 lamps and a
meter mounted in the panel at the top. There are six
writing shelf in each bay.
universal dc patch panels and a INT panel with 48

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