Switchboard Cabinets

2. Check to see that the equipment gates are

Routine preventive maintenance of the switch-

properly fastened.

board consists of a systematic series of inspection,

cleaning, and routine operational check procedures.

3. Check to see that the circuit card assembly

The routine checks are designed to be performed

retaining bars are properly fastened.

without disturbing the equipment any more than

4. Check for accumulations of dust, dirt, or grease

necessary. Do not make any adjustments while

in the cabinets. If the cabinets require cleaning, clean

performing preventive maintenance, and avoid

them according to the applicable MRC.

moving equipment wiring when inspecting or

cleaning the equipment. Preventive maintenance

Attendant's Cabinet

should be performed according to the maintenance

requirement cards (MRCs) associated with the system.

Inspect the attendant's cabinet using the following

The following paragraphs will discuss some of the

procedure:

more common preventive maintenance checks.

1. Check for accumulations of dust, dirt, or grease

GROUND FAULT DETECTION PANEL

on the cabinet. If the cabinet requires cleaning, clean it

according to the applicable MRC.

This check should be accomplished daily using

2. Check to see that the push-button switch retainer

the following procedure:

bars are in place and properly fastened.

1. Check the two meters on the panel; both meters

3. Check the telephone set handset for worn or

should read in the OK region.

damaged components.

2. Momentarily operate the spring-loaded

METER TEST switch. Both meters should read in the

SUMMARY

OK region.

3. If both the meters read in the OK region in steps

In this chapter, we have discussed the purpose of

1 and 2, there are no ground faults and the check is

the automatic dial telephone system. We have

completed. If either or both meters do not read in the

explained how the type G telephone sets used with the

OK region in step 2, notify your supervisor.

system operate and how they are maintained. We have

also identified some of the more common troubles

HINGES AND LOCKING MECHANISMS

associated with the telephone sets and the procedures

for correcting the troubles.

The hinges and locking mechanisms of both

We have discussed the functions of the automatic

cabinet doors and the four equipment gates should be

dial telephone switchboards and identified the various

cleaned and lubricated once a week.

switchboards and the automatic switching equipment

used in the switchboards. We have described the

CABINET INSPECTION

function of the attendant's cabinet used with the

The two switchboard cabinets and the attendant's

switchboards. We have also discussed the various

alarms associated with the switchboards and the

cabinet should be inspected once a month.

procedures for isolating and clearing these alarms.

Switchboard Cabinets

We have discussed some of the procedures used

in performing preventive maintenance on the

Inspect the two switchboard cabinets using the

switchboard and the attendant's cabinet, and we have

following procedure:

discussed shore lines and how they are connected to

1. Open the cabinet doors.

the system.

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