Figure 6-41.--Common panel test set.

As soon as line 262 is found, finder No. 15

(negative signal voltage), one to the S wire position

seizes its associated selector (No. 15) and dial tone is

for line 62 for Y direction hunt stop, and the other to

returned to the calling station by way of the wire

seize the level 6 section in the level detector. The

bank connection. The calling party now dials the

level detector responds to level 6 seizure by extending

initial digit 4 of the called station (474) and the rotary

level mark ground to mark position six of the XX wire

switch associated with selector No. 15 steps to seize

bank for X direction hunt stop, and request ground to

the next idle connector in switchboard No. 2. The

the find allotter.

next idle connector in this case is connector No. 13.

Selector No. 15 extends a seizure ground, which

The finder allotter, which serves to allot idle

prepares the connector circuitry for the second and

finders, routes the request ground to the next

third digits to be dialed. When the calling party dials

available finder in the allotter sequence. Assume that

the digit 7, the wipers of the XY switch associated

finder No. 15 is the next one available. This finder

with connector No. 13 step seven times in the X

responds to automatically hunt for the calling line in

direction, following the dial pulse. When the digit 4 is

the wire bank by stepping its associated XY switch in

dialed, the wipers step four times in the Y direction.

the X direction until the XX wiper encounters the

The XY switch wipers now rest on the wire bank

level mark ground in the XX wire bank. The X

position corresponding to called line 474. The

direction hunting then stops and Y direction hunting

connector extends ring voltage from the selector to

automatically begins. After two steps, the S wiper

the called line. When the called party answers, the

encounters the line mark battery which halts the Y

switch-through is completed. The audio path for the

direction hunting. The finder XY switch wipers now

call is shown in figure 6-40, view A.

rest in the wire bank position of the calling line 262.

Figure 6-41.--Common panel test set.

6-44