Connect a wire to the GRD binding
the mounting bracket.
Rotate the clamping arm upward to
post on the rear of the SB-22(*)/PT.
gain access to the flathead screw on
Connect the prepared leads from the
the side of the mounting. Tighten
SB-22/PT cable stub to the SB-
22(*)/PT binding posts according to
the following chart:
Use a screwdriver to remove the
flathead screw that secures the hold-
ing plate (inside the mounting
Remove the TA-312/PT from its
carrying case; store the case.
Insert the holding plate into the buz-
zer recess in the side of the TA-
Place the TA-312PT in the mounting
bracket and replace the flathead
Install two Batteries BA-30 in the
TA-312/PT and operate the LB-CB-
CBS switch to LB.
(1) Connect the prepared leads of a tele-
g. Remove the wingnuts that secure the re-
the LINE binding posts of the TA-
taining bar in the SB-22(*)/PT mounting
Connect PHONE 4 TA-312/PT tele-
h. slide the SB-22(*)/PT into the mount-
ing rack; replace the retaining bar and se-
cure it in place with the wingnuts.
i. Pull the SB-22/PT cable stub and con-
nect the SB-22/PT cable stub connector to
the receptacle in the signal duct (fig. 13).
Replace the cable clamps to hold the SB-
22/PT cable stub in place.
j. Connect the ground wire (f(1) above) to
a screw in the signal duct.
k. Connect the handset-headset (b above) to
the SB-22(*)/PT and perform the preinstal-
lation checks (TM 11-5805-262-12).
T O install the TA-312/PT (designated
PHONE 4) in its mounting bracket (fig. 11
and 23), follow the procedures in a below.
When the TA-312/PT's are to be used at the
status board (fig. 12) or in front of the
shelter (fig. 13), position each TA-312/PT
near the desired PHONE jack and perfom the
procedures in b below.
(1) Loosen the wingnut on the side of