Table 6-8.--Operation Procedures for the Link Panel Test Set

Table 6-8.--Operation Procedures for the Link Panel Test Set--Continued

CONTROL OR

NORM

REF

FUNCTION

DESCRIPTION

INDICATOR

Pos

DESIG

LINK RESET

DS4

Lamp, red lens cap

Flashes to indicate link is reset

after calling party or last party

release.

Indicates muting circuit is oper-

DS14

Lamp, red lens cap

MUTE

ative for ring-on-tip.

Indicates 45-second no-dialing

Lamp, red lens cap

DS2

OFF HOOK

timeout in link.

Lamp, red lens cap

Indicates power applied to test

POWER

DS1

set circuitry.

Indicates dialed stepping in Y

Lamp, red lens cap

DS13

RG/BY START

direction has occurred and link

is prepared to extend ringing.

DS9

Neon lamp NE2J

Indicates bridged ringing and

RING-R

ringing-on-ring.

Indicates ring-on-tip.

DS10

Neon lamp, NE2J

RING-T

Indicates automatic and dialed

DS6

Lamp, red lens cap

X STEP

(two lamps)

stepping in X direction.

and

DS11

Indicates automatic and dialed

Lamp, red lens cap

DS7

Y STEP

stepping in Y direction.

(two lamps)

and

DS12

been tested. The unit then resets and causes the XY

bench testing the operation of the XY switch. The unit

switch to move to level 2, and the Y direction process

is mounted in a wooden carrying case; the XY switch

is repeated. The sequence is repeated until all 100 lines

to be tested is mounted on the panel of the unit and

have been tested. The process automatically stops if a

plugged into the associated jack. Power for the test set

fault is encountered. Table 6-9 shows the routiner

is from an external 48-volt dc source.

operating procedure.

The purpose of the test set is to provide a way to

XY UNIVERSAL SWITCH TEST SET.-- The

test the stepping magnets of an XY switch under

XY switches and associated links are initially tested

various conditions. The testing conditions are as

in place. This is done by the link cycle push-button

follows:

switch located on the monitor and distribution panel.

This switch causes the linefinder XY switch in each

1. Pulsing tests at the rate of 12 pulses per second

idle link to step to level 0 in the X direction and to

with 34-percent make

overflow in the Y direction. A connector XY switch

may be checked by interchanging it with a linefinder

2. Pulsing tests at the rate of 12 pulses per second

XY switch of the same link. If an XY switch is

with 84-percent make

suspected of being faulty and further testing is

required, the XY universal switch test set is used.

3. Automatic stepping tests controlled by the

interrupter springs of the XY universal switch under test

The XY universal switch test set (fig. 6-44) is an

electrically operated, portable test set designed for

4. Stepping speed tests in the X or Y directions

6-50