(*)/TG for full-duplex vf operation (TM
wires identified with each cable pair
11-5816-206-12).
in the CX-4760/U. Connect the pre-
g. Insert the TT-4(*)/TG black, and red
pared leads of the CX-4760/U to the
teletypewriter connecting cord plugs into the
J-1077A/U binding posts, starting
TT-4A/TG (#l or #2, as applicable) SEND
with binding posts pair No. 1 for
and REC jacks, respectively, on the teletype-
CX-4760/U pair 1. For example, con-
writer patch panel (fig. 13 and 20). Set the
nect CX-4760/U pair 1 (wht-blu (A)
cords into the associated cord clip.
and wht-orn-blu (B)) to binding post
pair No. 1 on the J-1077A/U; con-
16. Installation of
TA-125/GT, J-1077A/U,
nect CX-4760/U pair 2 (wht-brn-
and Checking LS-147(*)/Fl Connections
b l u (A) and wht-gy-blu (B)) to
a. Installation of TA-125/GT. Place the
binding post pair No. 2 on the J-
TA-125/GT in its mounting bracket in storage
1077A/U, etc.
cabinet No. 12 and secure it in place with the
b. SB-22(*)/PT Circuits.
straps provided.
(1) Remove a TA-312/PT from the stor-
b. Installation of J-1077A/U. Place the
age cabinet.
(2) Use field wire and connect the TA-
and secure it with the straps provided.
312/PT to binding posts pair No. 1
c. Checking LS-147(*)/FI Connections.
at the J-1077A/U and perform the
Check to see that the telephone connecting
SB-22 (*)/PT talking and ringing
cord (fig. 2) is connected to the terminals in
tests (TM 11-5805-262-12).
the rear of the LS-147(*)/FI and that the
(3) Patch the LINES SB-22/PT jack
connecting cord plug is inserted into the IN-
TERCOM jack in the signal duct (fig. 13).
PHONE 4 jack. Perform the talk-
Check to see that the LS-147(*)FI power
cord connector is inserted into the INTERCOM
ing and ringing tests between the
receptacle.
PHONE 4 TA-312/PT (fig. 11) and
the TA-312/PT at the J-1077A/U
17. Testing Equipment After Installation
((2) above).
a. Preliminary Procedure.
(4) Remove the connections to binding
posts pair No. 1 at the J-1077A/U
and connect the TA-312/PT to bind-
make the power connections (para
ing posts pairs No. 2 through 12, in
21) before using the lights and con-
turn. For each SB-22(*)/PT line,
perform the talking and ringing tests
poses, any satisfactory ground may
((2) and (3) above).
be used in place of the ground rods
indicated.
c. PHONE 1 Through PHONE 4 Circuits.
(2) Energize the ac circuits (para 26).
(1) Remove a TA-312/PT from the stor-
age cabinet. Connect the prepared
leads of a telephone connecting cord
(fig. 2) to
the LINE
binding posts
(3) Connect the CX-4760/U connector to
of the TA-312/PT.
the 26-pair cable receptacle in the
( 2 ) Connect the TA-312/PT (b(2)
power and signal entrance box (para
above) to binding posts pairs No.
23b).
22 through 24, at the J-1077A/U in
(4) Remove the J-1077A/U from its
turn. Connect the TA-312/PT ((1)
mounting (fig. 13) and place it close
above), in turn, to PHONE 1
to the prepared leads of the CX-
through PHONE 3 jacks at the sig-
4760/U.
nal duct (fig. 12 and 13). Perform