Section III. PENTAGON

TM 11-5895-1012-10

370-1 power supplies are below the Hub repeater. Two

power supplies strapped for + and - 60 vdc out-

(3) Mux. Bay 5.06 and Power Equipment Bays

puts.

5.07 and 5.08. Bay 5.06 is a Collins MTX-201, VFCT.

(4) Orderwire Equipment Bay 5.09. The Dual-

Bay 5.07 is the -48 vdc power source bay. There are

Tone Multiple Frequency (DTMF) orderwire equip

two -48 power supplies at the bottom of the bay. Fuse

meat bay contains an SD-3751/FSC fuse panel, Re-

distribution panels along with a Lorain power hoard

monitor panel are above the power supplies. Bay 5.08

mote Link orderwire Unit TA-924/FSC, one line card

shelf, and two common equipment shelves. Duplex ac

houses the 60 vdc and 120 vdc power equipment

power outlets are in the front and rear bottom of the

along with a modified SB-1642 loop resistance panel.

A Hub repeater is also mounted in the bay. Two dc

bay. IDF blocks, inductors, and a component board are

voltmeter panels, three fuse panels and an alarm panel

in the rear of the bay.

are at the top of the bay. Four Northern Radio Model

Section III. PENTAGON

tions required to keep all communication links at their

3-7. Function

peak operating condition, all personnel must be thor-

a. Pentagon Telecommunications Center (fig.

oughly familiar with the station capabilities and the

FO-10). The U.S. Army Communications Command

functions of all equipment in the station. In addition,

Telecommunications Center (PTC)

familiarization with circuit links of related technical

mmunications Systems (DCS) for

control is required.

e. The Pentagon technical control facility is the

main Army TCF serving the Washington D.C. area.

The facility provides many high priority circuits to

and from various local government users to locations

scattered throughout the free world and to the Krem-

lin. Users and connecting sites often change.

f. The patch and test facilities of the TCF provide

access to each circuit for monitoring, rerouting, and

testing. Access is provided to both the black (en-

crypted) and the red (clear) sides of the circuits.

b. Technical Control Facility (fig. FO-11). The

cal Control Facility (TCF) at the Penta-

3-8. Technical Characteristics

technical control over BED and BLACK-

a. VF Patching Facilities:

ITAL, and VIDEO circuits appearing at

Red VF Jack Appearances (2-wire). . . . . .264 ea

se are comprised of military-owned VFCT

Black VF Jack Appearances (2-wire) . . . .960 ea

s and leased DC and data circuits. The high

Nominal Test Tone Signal Leval . . . . . . -2 dbm

data circuits are in the 2400 to 50K BAUD

Nominal Circuit Impedance . . . . . . . .600 ohms

The low speed circuits are predominantly

Normal Send Signal Leval . . . . . . . . . . . +8 dbm

secure circuits. Test and maintenance is also provided

Normal Receive Signal Leval . . . . . . . . -13 dbm

on Government-owned lines and circuits.

b. DC Patching Facilities:

c. Patch and Test Facility. (fig. FO-12). The P & T

Red DC Jack Sets.. . . . . . . . . . . . . . . . . .912 ea

function includes the monitoring of circuits and equip.

Black DC Jack Sets . . . . . . . . . . . . . . . . 1,296 ea

ment within a station, as well as the selection and

Nominal Signal Level . . . . . . . . . . . . . . . 6 vdc

application of the station facilities and associated

C. Video Patching Facilities

equipment, as n

to keep the station's operating

Red Video Jack Appearances.. . . . . . . . .160 ea

and standby communications links and circuits at peak

Black Video Jack Appearances . . . . . . . . 100 ea

. The Technical Controller coordinates

Nominal Circuit Impedance . . . . . . . . .75 ohms

in communications services at the station,

d. AC Power Requirements . . . . . . . . . . . . . . . . . . .

alternate routings, directs the correction of

208/120 vac, 3 phase, 60 HZ.

functions, restores service when outages occur,

e. DC Power Supplies

and coordinates link and station tests. The P & T Facil-

6 VDC . . . . . . . . . . . . . . . . . 4 ea: 2 Red, 2 Black

e station encompasses these areas which

24 VDC. . . . . . . . . . . . . . . . . 4 ea: 2 Red, 2 Black

with jacks, and test instruments to pro-

48 VDC . . . . . . . . . . . . . . . . 4 ea: 2 Red, 2 Black

vide access to the circuits for the purpose of perform-

3-9. Description of the TCF

monitor, patch and test operations.

To efficiently perform the technical control func-

The equipment is housed in two different rooms. All of

3-6