"Translating" your Disconnect Tone

[webudo]

Almost every Telephone Company around the world uses a different Disconnect Tone.
To "translate" your Telco's one, you can do the following:

Overview:

The idea is to record the disconnect tone on a wav file on your computer and then analyze it using Sigview.

What you need:

- Xlite (softphone you can download at: www.xten.com)
- Sound Recorder (the one included with every Windows OS)
- SigView (Signal analyzer you can download at: www.sigview.com)
- 2 FWD numbers (sign for 2 accounts on www.freeworlddialup.com)

Procedure:

SETTING THINGS UP

1- Configure the first FWD# (eg.123400) on your Sipura's "PSTN Line" tab.

2- Configure the second FWD# (eg.123401) on your Xlite softphone.

3- Open the Sound Recorder of your choice

4- Double-click the speaker icon on the system tray and go to "Options"->"Properties" menu.
On the properties window, mark the "Recording" radio button and make sure "Wave Out Mix" is checked in the "Show the following volume controls" box.
Press OK and you'll see the "Recording Control".
By default, the "Microphone" is selected, so change it to "Wave Out Mix". (this will make the recorder to get every sound that goes through the speakers).

RECORDING THE FAMOUS "DISCONNECT TONE"

1- Make a call to the PSTN line that goes to your Sipura. (from your cell phone for example)

2- After authenticating on the sipura, dial the second FWD# (eg.123401) so Xlite will start "ringing".

3- Answer the call, and make sure it establishes correctly.

4- Now hang up your cell phone, so the PSTN line on the sipura will get the "disconnect tone". (You will start listening the disconnect tone on your computer)

5- Start recording immediately! (save the .wav file somewhere on your hard disk)

"TRANSLATING" THE TONE

1- Open Sigview and go to "File"->"Open Signal" menu. Choose the file you just saved in the Sound Recorder.

2- Go to "Signal Tools"->"FFT Spectrum Analisys".

3- Look for the highest peak (of this red graph) and place the mouse pointer on it.

4- On the status bar, look for the "X:" value (eg.416.532) This is the freq. you need!



5- Close the TTF graph and get back to the blue one to get the times for the tone and the silence.

6- Place the mouse at the begining of the tone (bold part) and right-click to choose "set mark here". (see the picture)

7- Place the mouse at the end of the tone and place a mark here too.



8- Do your math, and rest the second value minus the first one to get the amount of seconds.
(eg. 1.111 - 0.906 = 0.205)

9- Repeat steps 7-8 but with the silence part (eg. 1.298 - 1.111 = 0.187).



10- Substitute the values you collected in the following string: (round the time values)

X@-30,X@-30;Y(A/B/1+2)

where:
X = The frequency in Hz. (mine 416)
Y = The cycles the pattern repeats (I used 4)
A = Time in seconds for the frequency (mine .200)
B = Time in seconds for the silence (mine .200)

So, in the example, I would enter this on the disconnect tone value of the sipura:

416@-30,411@-30;4(.2/.2/1+2)

Important:
The sipura gives a 10% of error for the frequencies, so it doesn't to be the "exact" value.

It worked for me, so I hope it helps you find your Telco's Disconnect Tone.

Good luck!

[mikey2006]

I have to say this post is VERY helpful, wish I thought of using this method myself.

THANKS!!!

[PhoneBoy]

Now if someone wants to use this method to get the right values for different countries (for all the different tones), maybe we can actually fill out the localization wizard with these values.

[mungojam]

UK Disconnect tone copied from another site and working succesfully here:

400@-30;20(*/0/1)

[Colin2905]

Originally Posted by PhoneBoy

Now if someone wants to use this method to get the right values for different countries (for all the different tones), maybe we can actually fill out the localization wizard with these values.

I'm in Australia, where I use 425@-30,425@-30;1(.375/.375/1+2), but in helping someone come up with the right string for Sri Lanka, I just came up with 425@-30,425@-30;1(.75/.75/1+2), based on a capture he made and e-mailed to me. As yet to be actually proven on the SPA-3000, but I'm pretty confident.

(The FFT actually showed the peak at approx. 422Hz, so 425Hz is most probably the actual spec. I checked the 750ms on, 750ms off, over four complete cycles, and it should be spot-on.)


Colin

[thepatel]

Is there some one who can help me get the disconnect tone from the attached .mp3 file. The file is recorded using X-Lite with Windows Sound Recorder - which means the actual loudness (as received by the SPA) may vary - appreciate if you can also teach me to change the loudness in the disconnect code.

The attached .mp3 file is a recording of the 10 sec tone when PSTN line hands up during a PSTN > VOIP call. The tone is for a BSNL E10B exchange.

Got excited by the possibilities of SPA 3K - but didn't realise I need to be a real tele-techie to get the gateway functionality to work properly.

Appreciate all the help I can get in making this work - and so will a ton of other people like me in India who could put this to good use.

[hayesey]

I work that out at:


400@-30,400@-30;4(.8/.8/1+2)

but it's my first attempt so don't be suprised if it doesn't work!

Sigview is pretty good but can anyone recommend a similar signal analyser that's freeware?

10- Substitute the values you collected in the following string: (round the time values)

X@-30,X@-30;Y(A/B/1+2)

where:
X = The frequency in Hz. (mine 416)
Y = The cycles the pattern repeats (I used 4)
A = Time in seconds for the frequency (mine .200)
B = Time in seconds for the silence (mine .200)

So, in the example, I would enter this on the disconnect tone value of the sipura:

416@-30,411@-30;4(.2/.2/1+2)

What I'm struggling to understand is where you get the 411 value for the 2nd frequency from? or is that just a typo?

[thepatel]

Thanx a ton Hayesey...

Tweaked the string a little bit to 400@-30,400@-30;10(.8/.8/1+2) which sounded very close to the real disconnect tone here. I still have to experiement if it actually works in real time. Will keep this topic/discussion posted on the same.

You did a great job at explaining the various parameters (X, Y, A, B) of the disconnect tone, appreciate if you can also complete the same by explaining the "-30" as well as the "1+2" bit.

Look forward & Thanx once again

[hayesey]

-30 is the "power level". so it means -30Db. 1+2 means play both frequencies 1 and 2 at the same time. where frequency 1 is 416 & frequency 2 is 411 in his example.

[wael]

Hi
thank you about this simple way to translate my disconnect tone
i tried it and it give me good result