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Page Title: Table 6-6.--Attendant's Cabinet, Controls and Indicators--Continued
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Table 6-6.--Attendant's Cabinet, Controls and Indicators--Continued
POSITION/INDICATION
FUNCTION
DESIGNATION
Momentarily pressed.
Disconnects attendant from a connection.
ATTD DISC
Switch/Indicator
Momentarily pressed.
Re-access dial tone if error is made in
DIAL CORR
dialing.
Switch/Indicator
Momentarily pressed.
Places a connected ship or shore line on
HOLD Switch/
hold.
Indicator
Momentarily pressed.
Manually extends ringing voltage to
MAN RING
magneto-type shore exchanges.
Switch/Indicator
NOT USED.
[NT switch/
Indicator
OperatedATTD DISC,
Connects attendant's handset to the
HOOKSWITCH
DIAL CORR, HOLD,
attendant's cabinet. Operates when hand-
and MAN RING switch/
set is removed from handset holder.
indicators on.
R e s t o r e d -- A T T D DISC,
DIAL CORR, HOLD,
and MAN RING switch/
indicators extinguishes.
A11OWS connection of an external head-
NOT APPLICABLE
PHONE JACK
set. (The permanently mounted handset
Connector
and hookswitch are disabled when this
connection is used.)
Enter dial pulses into a connected line.
Standard telephone dial,
Dial Switch
interrupts the current flow). The compactness of the
capacity of the system can be increased from the basic
system is due to modular construction techniques. All
number of 200 to 700 lines, in 100-line increments,
electromechanical and solid-state switching circuits as
simply by adding switchboard cabinets and associated
well as all power equipment are mounted on a single
cabling. Thus, a 200-line system initially installed can
equipment rack.
later be expanded to 300 lines, or to its maximum
capability of 700 lines, without disrupting the initial
installation. The number of simultaneous calls the
Description of Equipment
system can handle is equivalent to 15 percent of the
lines provided. As an example, a 200-line system is
The MDM 200/700 system is a modular,
capable of handling 30 calls at any one time.
electromechanical system that uses rotary stepping
switches and XY universal switches as the basic
You can use the system with any two-wire
switching components. The system is comprised of
telephone set, manufactured in the United States,
one system cabinet (fig. 6-26) and from two to seven
which employs break-type dialing (a dial that

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