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SECTION 503-702-101
5.
CONNECTIONS
Due to the limited number of mounting
cord conductors the telephone sets do
no t
f o l l o w
arrangements (Fig.
5.01
To provide mounting cord leads for illiminating
the HOLD button the ringer or buzzer leads
must be used, meaning, only two of the three
options (ringer, buzzer, or hold lamp) may be
provided at the same time.
5.02
To provide station busy lamp, modify the
telephone set per Table F.
(preferred), KS-21765L1, or KS-15724L1 diode is
used to prevent false busy indications and must
be ordered and installed separately.
5.03
To provide priority hold (I HOLD) modify
the telephone set per Table G.
5.04
To provide 3-type speakerphone leads in
the mounting cord, the buzzer leads along
with the lamp and lamp ground leads from the
last two pickup buttons of the key must be used.
An auxiliary D10R cord may be used if these leads
are not available.
for connections and Table I.
Page 6
BSP 503-702-101-iOS 1977-12-0G.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Oct OS, 2012 17:0
s t and a r d
w i r i n g
7
through 15).
The 553K
Refer to Section 512-620-485
5.05
To provide 4A speakerphone connections
refer to Section 512-740-470 and Table I.
5.06
To provide polarity guard for all 2831-type
telephone sets except the 2831DM, refer to
Table E.
The 2A1 matrix block is used as a
polarity guard for the 2831DM telephone set (see
5.08).
5.07
For schematic information, refer to Fig. 7
through 15.
5.08
The 2A1 matrix block (ordered separately)
provides the polarity guard function to
telephone set with multiline conferencing via
multibutton depression. The matrix block consists
of a 66-type molded plastic connecting block,
containing quick-connect terminals wired and equipped
with eight diode bridges for eight lines. The matrix
block is connected between the line circuit and
the station cut-down field. For connections to the
2A1 matrix block, refer to Table H .
If a station requires line ringing on
a particular line, connect the ringing
leads from the key telephone set to
the appropriate terminals on the LINE
SIDE of the matrix block, not to
the station side.
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