ATCOM AT840 series User Manual page 43

AT8 AT8 AT8 AT84 4 4 4 0 0 0 0 Series Series Series Series User User User User Manual
2.3 2.3 Only Only one one part part
2.3 2.3 Only Only one one part part can
A. Make an IP dial-up call to make sure the telephone receiver and Mic are normal.
B. Enable STUN on web page.
C. Set STUN server as stun.3cx.com.
D. Click on "submit" and wait for the phone to restart.
E. Try to make calls again.
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can can hear hear the the voice voice
can hear hear the the voice voice during
during during the the call call
during the the call call
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