Circuit Configurations

TM11-5895-932-l4&P

2-4. Circuit Configurations

signal sent to the teletypewriter terminals; and the

high level dc patch panel.

The circuits that pass through the PTF can be

b. AUTODIN Lines. The AUTODIN lines

placed in three general categories: the teletype (dc)

handle the two AUTODIN duplex lines that travel

lines, the AUTODIN lines, and the lines to the

through the PTF. Shown on the left side of the

remote terminals (vf) (both secure and unsecure).

diagram is the station entrance at the signal line

The simplified diagram (fig. 2-3) shows the

filter and two sets of panel jacks at the vf patch

configurations and symbols that represent the

panel. Following the signal through to the AMME

major equipment blocks and interface.

there is the WU modem block, the black dc patch

a. DC lines. The dc lines handle low speed

panel, the WU junction box, and the red dc patch.

teletpye signals as shown on the left hand side of

The WU modem functions to modulate the AMME

the diagram. Moving across the diagram from left

signal or transmission to the ASC and demodulate

to right, the line encounters the red dc patch as

the signal from the ASC. The signal between

showon by the symbol for two normal through and

modem and AMME is carried on 12 wires and

two monitor jacks. The circle symbols on the line

requires a special 12-wire patch panel. Six wires

represent terminals in the distribution frame to

are used for each direction of signal flow. The WU

which the wire pairs are connected and can be

junction box is the entrance point to the COMSEC

identified on the station as-built cross-connect

devices; it also provides for switching in spare

drawings. The red-black isolators, which provide

COMSEC units and testing by connecting the

isolation of the red wiring from the black wiring;

transmit and received lines together (back-to-back

the black dc patch; the DLIU which changes the

low level signals used by AMME to high level

testing).

2-6