Ericsson DIALOG - Page 24

the start. From this it will be understood how important good
adaptation between an instrument and the local c able is for setting
up good long-distance connections, which are becoming more and
more common.
The function of shock absorber is to protect the speaker's ear
from incoming shock voltages caused by such exchanges where
sparking and clicking occur when the selector is set out. Such
shock voltages can also result from impulsing and line faults .
Shock
protection is of course not necessary for the function of
the instrument and can be omitted if desired.
30
x
ohms
500
800 . - .
1500
1000 ohms
,.,.,.,,..~ -,s ~ ...:_~nms
/. ' ............ ~
1500 '-.. -,
2 50
;i., .,.,: ~so o
\ \.
l l
3500 Hz 3500 Hz 3500 Hz
Fi g . 34
23
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