TM 11-5895-846-14
f.
Central Distribution Frame.
Signal
TX Clk to TX Clk
RX Data to RX Data
routing of user VF, TTY/FSK and TTY/low level circuits
RX Clk to RX Clk
to the CSS is done at the CDF matrix patch board using
Modem INT CLK to Par bus
the red (four wire circuit) programming pins. When
(b) KG81-A21-A1
Plain
Text
to
inserted into the board, these pins connect a user four
AN/FCC98-A13 Serial Data:
wire circuit, available at the external J-Box, to a specific
TX Data to TX Data
CSS equipment processing thread.
VF circuits.
TX Clk to TX Clk
(1)
(a) The normal configuration is to
RX Data to RX Data
RX Clk to RX Clk
connect user line side VF channels 1 through 12 to VF
FCC98 EXT Clk to Par bus
patch panel, VF EQPT channels 1 through 12,
FCC-98 Lose Frame to RSY
respectively. The programming pins form a diagonal line
(c) Repeat (a) above for MD1002-A6
1 to 1 through 12 to 12.
(b) User line side, channels 13 through
modem to KG81-A21-A2 cipher text.
(d) Repeat (b) above for KG81-A21-A2
19 are connected to VF patch panel. CDF spares 1
plain text to AN/FCC-98-A29 serial data.
through 7, respectively making J-Box spare four wire
(e) Patching of the standby modem and
circuits available directly at the VF Patch Panel.
(c) VF circuits, data bypass mode. For
MUX in (c) and (d) above allows monitoring these units
users employing voice band data modems exclusively,
on an active basis with the modem looped at the IF
the echo suppressor can be disabled (on a channel by
patch.
(2) User data rate patching.
channel basis) using spare terminal pairs at the VF XMT
(a) Patching of the multiplexer user data
J-Box. This is done using a programming pin at the
matrix board to connect the data user channel ES
rate ports depends upon the mission requirements and
disable line to the TX J-Box and shorting the chosen
must be coordinated with all other terminals in the node.
spare terminal pair. This function could be extended to
(b) User data from any of the data
the user location for control of that circuit for data or
entrance panel ports must correspond to the multiplexer
voice. It should be noted that voice band data modem
data module rate to which it is patched. These rates are
user having the tone disabling feature does not require
limited by the multiplexer to 0-20, 50, 56/64/128/256/ 512
the metallic ES disable function.
kB/s. Reference must be made to the multiplexer TM for
(2) TTY/FSK users. The CSS can accept up
data module programming and allowable location within
to five user TTY/FSK channels. These are usually
the multiplexer main frame. In the AN/TSC-86 the data
connected to VS/FSK TX and RX J-Box terminal pairs 20
modules will be restricted to the first 12 multiplexer slots
through 24. Programming pins then route these user
with VF traffic occupying the rest of the multiplexer slots
circuits to TTY/FSK patch, channels 1 through 5,
in a fully loaded, 1544 kB/s MBS, system.
respectively.
(c) Twinaxial patch cords are used to
patch each data user to the on-line multiplexer:
can accept up to four user TTY/low level channels.
TX DATA to TX DATA
These are connected from the TTY, TX/RX J-Box,
TX CLOCK to TX CLOCK
terminal pairs 11, 13, 15 and 17 transmit, terminal pairs
RX DATA to RX DATA
12, 14, 16 and 18 receive to the CDF Matrix Patch LO
RX CLOCK to RX CLOCK
LEV 1, 2, 3 and 4, respectively. Programming pins then
(d) For synchronous data operation at
route these user circuits to TTY LO PATCH 1, 2, 3 and 4.
56, 64, 128, 256 and 512 kB/s the user transmit data
(4) TTY/high level users. TTY high level
must be phase locked to the multiplexer and such
users are connected at the TTY, TX/RX- J-Box, terminal
operation limited to multiplexer slot 4 and 8. Triaxial
pairs 19, 21 and 23 transmit and 20, 22 and 24 receive.
looping plugs are then used at the data patch to connect
These user circuits do not appear on the matrix patch
the AN/FCC-98-A13 or A29, channel 4 and/or channel 8
but are routed through the CDF fuse panel. These user
TX CLOCK OUT to the user lines. These looping plugs
lines terminate at the high level side of the line isolator
are oriented horizontally for this patch function.
units, LIU-1, 2 and 3, respectively. Patching of the LIU is
(e) The 50 kB/s data channels are for
on the low level side only.
user encrypted secure voice and are processed through
g. Data Patch Panel (fig. 2-19).
the CV-3034 A/D converters. Patching of these circuits
(1) Serial data stream patching. Using blue
is done with triaxial looping plug as follows:
triaxial looping plugs (LPTWM-78), patch the following
circuits:
(a) MD-1002-A3
Modern to KG81-
A21A1 Cipher Text:
TX Data to TX Data
2-43
