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SECTION 503-702-110
Fig. 2-2833BM Telephone Set Bose
similar to the above sets except a 647N5C
key is
located in the upper key
position consisting of a
RECALL button, a RING TRANSFER button
(not
connected),
and
eight
line buttons.
The
RING
TRANSFER button must be wired in
the field
when
ring transfer option is provided
(Table
E).
Note:
In
early
production
833C and 2833C
telephone
sets
the RING TRANSFER
key was
factory
wired.
2.04
The DM
and
EM
(wall
type)
sets and
BM
and CM
(desk
type) sets are
not interchangeable
due to the mechanical
changes in the
handset
hanger
and
the new 6Cl-50 housing.
2.05
An
adapter
(833A-50) will
be furnished
with
each
DM
and
EM
telephone set for wall
mounting. The
switchhook
of
these sets
has
been
designed
to
hang vertically to
the
left
of the
housing. The
sets
are
equipped
with
a
hard-wired
mounting
cord
which
can
be coiled up
and concealed
in
the adapter or
the
cord can
be
extended
down
the wall
through
a
notch in
the adapter
for
termination
to
appropriate connector-ended cable.
All
maintenance
can
be performed
on
internal
components of
these
sets without
removing
the set
from
the
wall.
2.06
All of
the
833-
and 2833-type
sets provide
the
same
basic
services such as
pickup, hold
and illumination,
and intercom. They are
equipped
with a
loudspeaker to provide
tone and voice
signaling.
The level of the
tone
is
adjusted
by
a
volume control
knob located under
the
right
side
Page 2
of housing.
Two
or
more
CO/PBX
lines may be
conferenced by
simultaneously
depressing the
buttons
associated
with the
lines
to be conferenced.
The
three
intercom
lines
may also be conferenced.
Intercom
and CO/PBX
lines
cannot
be
conferenced
except
in
the 21A communication system
when the
3rd
IC path
is terminated on a
multipurpose
button.
Automatic
button
resotration
restores
all
depressed
buttons to
the
unoperated positions
when
the handset
is
replaced.
2.07
Multiline
conferencing
is
a
feature of these
telephone sets. Since there
is no
amplification
involved, this type conferencing
is limited.
When
lines
are conferenced,
using
this
manner
of
conferencing,
distant
stations may
have
trouble
hearing
each other and transmission is
not
guaranteed.
Note: •when
a
telephone
set
is modified
for
4-wire service,
multibutton
conferencing
between
2- and 4-wire systems is not
recommended
.•
2.08
The
833- and 2833-type telephone sets may
be used with either
the
3-type (MD) or 4A
speakerphone system.
•
1\
The limited number of mounting cord
conductors places a restriction on the
location of 3-type (MD) speakerphone
components
unless it is desired to give
up one pickup line.
Refer to
Section 512-620-487 or 512-740-471
for connection information for
the 3-type (MD) or 4A speakerphone
system.
2.09
The
833- and 2833-type telephone sets are
available
in Ivory
(-50) only.
These
sets
will
be
shipped with a
disposable
faceplate, so it
is necessary to
order the proper 833A
or
2833A
faceplate separately (Table
B).
2.10
Any CO/PBX line
may be
optionally wired
to
ring
at one to four stations (maximum
of two in addition to two attendant stations).
Refer
to Section 518-450-110
for
strapping
information.
When common audible ringing is wired
to a station other than one of the
attendants station that station cannot
have the ring transfer option. The
21A communication system can
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