DTMF tones not working to verify number for google voice

[GoogleCodeExporter]

Got GV number but unable to use DTMF dial pad to verify phone, there are no 
key tones when I press the numbers.

Original issue reported on code.google.com by omi...@gmail.com on 18 Jul 2009 at 9:16

[GoogleCodeExporter]

My Panasonic cordless phone doesn't dial loudly enough for Google to hear the 
tones.

In order to verify this phone, I used this online tone generator played from 
the speakers of my computer:
http://onlinetonegenerator.com/dtmf.html

This is an issue of loudness, not briefness. Google can't hear the tone unless 
it is loud. If the tone is brief and loud it does fine. If it is low and long 
Or low and short, Google doesn't hear it.

Although this online generator did get me passed the verification process, it 
is still an issue for me because, when Google's Calls screening asks me to 
press 1 to pickup the call, it doesn't heard the 1 I press on this Panasonic 
cordless phone.

Original comment by lonnie...@startport.com on 27 Jan 2014 at 2:48

[GoogleCodeExporter]

Thank you lonnie...@startport.com.
I was able to activate my Google Voice forwarding using the tone generator link 
above. At first I had no luck, but then I decided to call the ipkall washington 
number directly from another phone to hear what was happening. I realized I 
could only hear 1's, 4's, and 7's. The other numbers were just coming across as 
clicks. I ended the call and went back to Google Voice. I kept refreshing the 
2-digit activation number until it contained both of the numbers above (took 15 
attempts). Then I tried again and it worked instantly. Later when I tried to 
repeat the process, I noticed that different numbers were working and that the 
1's, 4's, and 7's were just coming across as 'clicks', so you will want to test 
by calling the ipkall number directly to see what tones are coming across and 
which are just clicks. Not sure why this happens.

Original comment by tempandr...@gmail.com on 6 Jul 2014 at 7:09