Table 6-6.--Attendant's Cabinet, Controls and Indicators--Continued

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

6-30