SECTION 512-700-100
codes of telephone sets. The adapter consists of
a plastic housing and a cord with a 50-pin connector
on one end and either spade-tipped terminations
or a post-type connector on the other end. The
connector end accepts plugs from the transmitter
and loudspeaker set and the plug from an M2FG
cord (furnished with the adapter) which connects
to the 85B1 power unit. The cord from the adapter
connects to the telephone set. Three codes of the
223-type adapter are described as follows.
(a)
223A (MD) Adapter:
This adapter is
equipped with an M16C cord having a 50-pin
connector on one end and spade-tipped conductors
on the other end for connection to telephone
sets with screw terminal fields, see Fig. 11.
(b)
223C Adapter:
This adapter is equipped
with a Dl6H-50 cord having a 953-type
connector for connection to telephone sets equipped
with square-post connection fields, see Fig. 12.
Fig. 6-223A {MD) . 223C, or 223D Adapter
(c)
223D Adapter:
This adapter is the same
as the 223A adapter except that it is equipped
with a M16H-87 cord instead of the M 16C (MD)
cord.
The (0-R) lead of the M16H cord is
connected through to provide a remote ON lead
for enabling the one-touch calling feature of the
TOUCH-A-MATIC® telephone sets and adjunct
dials, see Fig. 11.
G. BOA {MD) or SOB Control Unit
2.18
One 80-type control unit is required for each
4-wire or combination 2-wire/4-wire station
used with 4A speakerphone.
Page 6
2.19
The 80-type control unit (Fig. 2 and 7)
provides for connecting the 4A speakerphone
system to either a 2- of 4-wire telephone transmission
network. All standard operating features of the
4A speakerphone system are retained. Attached
to the chassis of the control unit is a connector
(same as that used in the 223-type adapter) to
which the 108-type loudspeaker set, the 680-type
transmitter and the 85B1 power unit are connected.
2.20
The 80B control unit replaces the 80A control
unit. The 80B is the same as the 80A with
one exception; an additional connection from the
4A speakerphone system has been added on a
screw terminal of the 80B which is required for
enabling the one-touch calling feature with
TOUCH-A-MATIC telephone sets and dialers.
2. 21
For additional schematic and circuit information,
refer to SD- and C D-69923-01, respectively.
For typical connection information, refer to Section
512-730-460.
H.
8581 Power Unit
2.22
The power unit transforms the local
customer-provided 115-volt, 60 Hz power to
the voltage required to operate the 4A speakerphone
system.
2.23
A reta1mng clamp (841050818) (Fig. 1 and
2) will be shipped with the 85Bl power unit.
3.
INSTALLATION
A. Telephone Sets
3.01
The telephone sets specified for use in 4A
speakerphone system provide the following
features.
( 1) A set of normally closed (with handset
on-hook) line switch contacts to disconnect
the speakerphone when the handset is lifted.
(2) Two sets of off-normal (make) contacts in
the dial (rotary dial sets dialed in an on-hook
condition) to short loudspeaker receive path and
handset receiver during dialing.
(3) A set of make contacts (s and t) in the dial
common switch (TOUCH-TONE® sets dialed
in the on-hook condition) to connect line power
I R lead from the loudspeaker set to the dial
oscillator. If a polarity guard is provided these
BSP 512-700-100-i05_1979-Q4..Q6.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 16, 2012 23:01:12
