tigerking wrote:
.....
I tried to use all the codec combinations and none of them worked well in delivery the DTMF. I therefore think that this is not the codec issue between my phone/ATA to my remote end as the session between my ATA and FPL VoIP server is using DTMF via SIP INFO. It is suspected that the problem is between FPL VoIP server and the PSTN to the destination phone number. FPL didn't convert the DTMF via SIP INFO probably and send over the PSTN. All crappy tones! At least it happen on my FPL#. It may not happen on FunkyTown's FPL#??
I shall PM FPL again to see what they say.
BTW, any way we can submit a recorded tone sound to FPL for investigation in the Forum?
Hi folks, FPL personnel really looking at the forum and listen to our frustrations. Great!
Just re-configured the ATA tonight (Nov 3) to insert DTMF in various ways and trying to record some DTMF tones for PM to FPL to analyse when I got home.
When I set the ATA to insert DTMF via "RTP RFC2833" and call a normal phone of other carrier over PSTN to record the DTMF tone at the remote phone by pressing keys on the phone attached to the ATA. (It was not able to hear the DTMF tone before), BUT now, I can hear the tone, very clear and good quality. FPL must watch this forum and get what the problem is (not translating the DTMF via RTP to the PSTN gateway) and I believe they fixed it.
I then made calls the FPL voice mail by *98 and Remote access line and test my company voice mail system, and my CIBC banking hotline. ALL WERE WORKING NOW.
FPL, can you confirm with us if you have done something behind the scene?
If yes, great job and well done.
Now I have all my issues solved.
Thank you very much.
Additional note on Nov 6, 2010:
Just one more note that the DTMF via RTP quality is not very good when sent across PSTN to other network. There is always a glitch in front of every stable tone.
Attached please find the DTMF MP3 (zipped) that I recorded by using the phone attached to the FPL ATA and set the DTMF to via RTP RFC2833.
I called a normal phone on Telus network and record the received DTMF key tone on the side of Telus phone and pressed the keys on the FPL phone. I repeat that with another analogue phone and get the same result too.
The numbers are 1,2,3,4,5,6,7,8,9,0, *, #
You will notice that a glitch present in front of every key stroke.
It is not a big deal if slow down the key press speed and let the other side detect the DTMF tones in the stable part after the glitch. The only trade off is I have to slow down my key press speed.