SECTION 5 12-620-440
(f) Install proper faceplate and mat. Refer to
the appropriate Reference section for ordering
information.
3.
CONNECTIONS
For proper operation of the 3-type
speakerphone system, ground must
be present on the Al-lead. Connect
ground to the appropriate terminal
on the telephone set or at the
55-type (MD) control unit.
3.01
Where required, ringer and buzzer operation
can be interrupted through break contacts
of the 55-type control unit to prevent pickup while
using speakerphone.
3.02
Connections are also shown for busy lamp
controlled by speakerphone.
Where it is
desired to have the busy lamp controlled by
speakerphone and line switch, refer to the Service
section for the set involved.
3.03
Either the 55A (MD) or 55B (MD) control
unit may be used with sets equipped with
rotary dials. Connections to the 55A control unit
are the same, whether or not the unit has been
modified for TOUCH-TONE service.
3.04
A 55B control unit or a 55A modified for
TOUCH-TONE service must be used with
sets equipped with TOUCH-TONE dials. Modified
55A units are indicated by an asterisk following
the code stenciled on the unit.
3.05
To retain the maximum number of keys in
the CALL DIRECTOR® telephone sets and
still have speakerphone feature, a 666A (MD) or
666B (MD) transmitter and 760A (MD) loudspeaker
may be installed as adjuncts to the telephone set.
Spare leads and hold key lamp leads from the first
module are used to supply the external speakerphone
function. When control unit and telephone set are
at same location, an auxiliary mounting cord (D10R)
may be used. When control unit is located at key
equipment extend speakerphone leads using mounting
cord and connector cable.
3.06
Installation and maintenance information for
these sets is found in Section 502-600-100.
Refer to Section 512-620-100 for installation and
maintenance of speakerphone components.
TABLE A
Page 2
CONNECTIONS FOR 667-TYPE TRANSMITTER LEADS
CONNECT TO•
TRANSMITTER
LEAD
630A
631A
630D
1630D. 16310
DESIG
6308
63_16
631D
2630D. 2631D
667A (MD)
6676
630C
631C
TEL SET
TEL SET
TEL SETS
R1
O·R
BL-Y
1
2
2
T1
0-G
Y ·B L
RRt
R Rt
10
P3 or
ffi
O·W
Y·G
W:j:
11
11
P4 or IT
0-BL
G·Y
BB:j:
12
12
AG
0
O·Y
Gt
5
5
A1
y
0-V
4
1
1
LK
0-BK
Y·O
L1t
9
9
*
Terminals on telephone set terminal board except where otherwise noted.
t
Terminals on network.
:j:
Terminals on dial.
Sl2-620·440-i05_1979-07.02.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 16,2012 23;00:28
