View single post by slychiu

Posted: Thursday Nov 7th, 2019 03:55 am

Joined:	Saturday Apr 29th, 2006
Location:	Singapore
Posts:	5500
Status:	Offline

If doing a Dial Test to a Mobile phone programmed as Voice Phone, and if the phone is near the keypad which initiated Dial Test, please put the Phone on Mute.

Otherwise because the keypad has its speaker turned on duringt Dial Test there will be feedback from the Keypad speaker to the microphone of the phone which will cause echo.

More importantly DTMF keys presses may be repeated due to the feedback
This problem does not occur fopr Dial In or normal Dial out (Not Dial Test)

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