Bell System Practices 630 Series Manual page 2

SECTION 5 12-620-440
(f) Install proper faceplate and mat.
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.
ground to the appropriate terminal
on 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.
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
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Sl2-620· 440-i05_ 1979-07. 02.jpg
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado
Refer to
Connect
telephone set or at
Where it is
CONNECTIONS FOR 667-TYPE TRANSMITTER LEADS
TRANSMITTER
LEAD
DESIG
667A (MD)
R1 O·R BL-Y
T1 0-G Y ·B L
P3 or ffi
O·W Y·G
P4 or IT
0-BL G·Y
AG 0 O·Y
A1 y 0-V
LK 0-BK Y·O
* Terminals on telephone set terminal board except where otherwise noted.
t
Terminals on network.
:j:
Terminals on dial.
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
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
CONNECT TO•
630A 631A
6308 63 _ 1 6
631C
630C
6676
TEL SETS
1
RRt
W:j:
BB:j:
G t
4
L1t
Feb 16,2012 23;00:28
630D 1630D. 16310
631D
2630D. 2631D
TEL SET TEL SET
2 2
R R t 10
11
11
12 12
5
5
1 1
9 9