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Ericsson DIALOG - Dialog Telephone Design and Components

Ericsson DIALOG
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6
3.
DESIGN
As
shown
in
fig. 4,
Dialog
has
seven
main
parts,
namely
Handset
with
cord
Instrument
cord
with
wall-terminal
box
Instrument
case
Base
plate
Dial
unit
Transmission
unit
Ringer
unit
Fig.
4
The
main
parts
of
Dialog
As
the
ringer
unit,
transmission
unit
and
dial
unit
are
keyed
into
the
base
plate
no
screws
are
required.
The
instrument
and
handset
cord
conductors
are
mechanically
connected
to
screw
terminals
on
the
transmission
unit.
The
instrument
case
is
fixed
to
the
internal
parts
by
means
of only
one
screw,
well
located
for
the
repairman
and
concealed
from
the
subscriber
(fig. 5).
Each
unit
has
its
own
function
and
can
be
replaced
by
an
identical
unit,
regardless
of
the
other
units.
The
assembly
method
enables
a
complete
telephone
instrument
to
be
built
up
of a few
units
,
each
of
which
comprises
several
components.
From
the
maintenance
point
of
view
this
is
a
most
valuable
method
of
design,
since
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