TM 11-5895-846-14
User Data, Secure Voice
CV-3034 Hybrid
channel port (slot), equipped with an EM4 module of the
TX 1
A11 TX
on-line multiplexer.
(b) Typical operation for a fully loaded
RX 1
A11 RX
TX 2
A12 TX
1544 kB/s, MBS system, with 12 user VF channels,
RX 2
A12 RX
would assign one of the multiplexer slots 1 through 12 for
CV-3034 interface to the multiplexer 50 kB/s channel is
link orderwire (since slots 13 through 24 carry the user
done with twinaxial patch cords to the proper 50 kB/s
12 channel VF group). Patching for this service would
channel slot of the on-line multiplexer:
then be: OW BRIDGE, LINE, TX, 1, RX to MUX A29 (or
TX DATA to TX DATA
A13) LINE using a Bantam dual patch cord.
TX CLOCK to TX CLOCK
(4) TTY group. This four wire circuit from the
RX DATA to RX DATA
TTY/FSK filter bridge appears on the VF patch panel and
RX CLOCK to RX CLOCK
is patched in similar manner to that of the orderwire
h. VF Patch Panel (fig. 3-15).
group to an assigned multiplexer slot equipped with an
(1) With the exception of the order wire and
EM4 VF module.
TTY group accesses, the VF patch panel uses normal-
(5) VF/TTY trunk. These three 4-wire circuits
through jack field wiring requiring no patch cords for
appear on the TTY/FSK patch panel and allow routing
routing the 12 user VF channels through the signal
high priority TTY traffic to the available multiplexer VF
processing stages to the VF ports of the on-line
circuits. Patch considerations are identical to that of the
multiplexer.
TTY or orderwire groups.
i.
TTY/Low Level Patch Panel (fig. 3-13).
(2) For 1544 kB/s MBS operation the 12 user
VF channels are routed to the on-line multiplexer
(1) The TTY/low levelpatch panel is wired
channel slots 1 through 24 not used for data. This is
normal- through from the four user low level circuits to
done with the three position lever switches of the VF
the low level side of the four keyer/converters.
patch panel. These switches allow the following routing
(2) The low level side of the three line isolator
of the user VF channel group:
units (LIU) must be patched 'to the keyer/converters to
(a) Switches 1 through 12
User VF group to
bring them on-line. This patching will preempt a low level
Up Switches 13 through
MUX A29 channel
user. This patching would be: LIU LOW LEVEL, 1, 2 or
24 Neutral (Center)
slots 1 through 12.
3, LINE TO KEY/ CONV, EQPT 1, 2, 3 or 4, assignment.
For 772 kB/s or less
(3) The local TTY machine must also be
MBS operation.
patched to come on-line.
Patching and frequency
(b) Switches 1 through 12
User VF group to
coordination is identical to that of the LIU.
(4) TTY/data trunk.
Six, 4-wire circuits
Neutral Switches 13
MUX A29 channel
between the TTY/low level patch and the data patch
through 24 UP
slots 13 through 24.
panel allow routing of high priority TTY traffic to any
For 1544 kB/s MBS
available low rate 20 kB/s data channels. This patching
operation.
(c) Switches 1 through 12
would be from any LINE side low level user to the EQPT
User VF group to
jacks of the TTY/data trunk using twin bantam patch
Down Switches 13
MUX A13 channel
cords.
through 25 Neutral
slots 1 through 12.
j.
TTY/FSK Patch.
For 772 kB/s, or
(1) The TTY/FSK patch panel is wired
less,
MBS
normal- through from the FSK side of the four
operation.
(d) Switches 1 through 12
keyer/converters and the five user remote FSK circuits to
User group to MUX
the nine channel TTY filter bridge. No patch cords are
Neutral Switches 13
A13 channel slots
required for this configuration.
through 24 Down
13 through 24. For
(2) Three, 4-wire trunk circuits are provided
1544 kB/s MBS
for patching high priority FSK traffic to available VF
operation.
channels. Patching would be from the line jacks to
(3) Orderwire group.
EQPT jack row of the VF/TTY trunk using twin bantam
(a) Three ports of the orderwire bridge
patch cords.
appear on the VF Patch Panel, of which only one is used
for normal link orderwire use. These circuits are not
wired through and must be patched to an available VF
2-44
