(a) Operate the appropriate switching
mechanism on the associated (external) equip-
ment to energize the outgoing telephone circuit.
(b) Squeeze the push-to-talk lever so that
it is depressed against the bar-actuated switch.
Caution: Do not apply pressure with a
force great enough to engage the bar-actuated
switch.
(c) Engage the switchbox locking mech-
anism by sliding the push-to-talk lever upward;
this will lock the push-to-talk lever against the
bar-actuated switch.
(4) Momentary radio transmission (position
No. 4).
(a) Operate the appropriate switching
mechanism on the associated (external) equip-
ment to energize the outgoing radio circuit.
(b) Disengage the switchbox locking mech-
anism (if previously locked) by sliding the push-
to-talk lever downward.
(c) Squeeze the push-to-talk lever so that
it is depressed against the bar-actuated switch.
(d) Continue to apply pressure ((c) above)
with enough force to depress the bar-actuated
switch to its inward limit.
(e) Hold the push-to-talk lever and bar-
actuated switch in this position ((d) above)
throughout the radio transmission.
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