repeaters.
Both
of
these methods are susceptible
to
interception
by
rival businesses
or
governments. The STU
111/SECTEL
(Figure
1-1)
provides the high level encryption necessary
to
protect
our
nation's
military
and industrial secrets.
• Small Size. No larger than a standard office telephone, the STU
111/SECTEL
fits easily on any desk.
• No noisy blowers
or
fans.
An
efficient external power converter
assures
that
the STU
111/SECTEL
will be a welcome addition
to
any office environment.
• Retention
of
emergency communications. If power
is
interrupted
for
any reason, the STU
111/SECTEL
will function
as
a plain old telephone (POT)
to
provide reliable communications
in an emergency situation.
• Field upgradeability. Motorola is continually developing
enhancements
to
ensure
that
the STU
111/SECTEL
maintains its
state-of-the-art position among secure communications systems.
• Ease
of
programming.
With
many
user-definable parameters,
the STU
111/SECTEL
can be tailored to
your
individual
requirements.
• Ease
of
use.
The
adjustable message display shows the status
of
all STU
111/SECTEL
modes and functions.
• Dialing flexibility.
The
STU
111/SECTEL
is
compatible with both
tone and pulse dialing systems.
• Adjustable handset speaker and ringer.
The
handset speaker
and ringer volume can be set
to
meet your individual needs.
• Standard telephone with speed-dialing capability.
• No batteries to replace.
In
addition
to
the features listed above, the STU
111/SECTEL
(Bell
1A2) Model offers multiline operation, an intercom function, a
HOLD feature, and
LED
indicators for these additional functions.
Motorola also offers a STU
111/SECTEL
which
is
directly
compatible with the
AUTOVON
telephone network.
1-3
