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Thread: FXO Disconnect Settings SA

  1. #1

    Default FXO Disconnect Settings SA

    HI
    Does anyone have the FXO disconnect settings for South Africa as i believe FXO's not releasing is a common problem which is resolved by entering the custom fxo settings.

    Thanks

  2. #2
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    Darril, if such disconnect settings existed, they would have been applied by default by Epygi, as soon as you select SA as your locale...

    Unfortunately, in your beautiful country there are too many differents standards used (better to say - no standard is used) for disconnect tones.
    When doing trainings in SA I noticed several tones used by different telcos, and the FXO disconnection issues really look to be one of the bigger problems resellers face in SA.

    There are methods to resolve those problems however. The easiest is the following:
    1. Route your FXO line to some extension, which has voicemail service.
    2. In "Voice Mail Common Settings" set the "Recording Codec" to G.711u.
    3. Make an incoming call through that FXO and wait until the voicemail of the target extension activates. As soon as you listen the beep indicating that the voicemail recording is started, put down the handset.
    4. Wait for some time. During that time voicemail system will record the disconnection signal from your telco. Typically you have to wait 5 minutes, which equals to the Max mail duration on the extension by default (if you want it to be faster, decrease the "Maximum mail message duration" from the "Voice Mail Settings" of that extension before making the test call).
    5. Open the "Voice Mailbox" of that extension in the web browser, and download the voicemail.

    After that you have two choices:
    a) either send that to Epygi to analyse and give you the values to enter to the "fxocfg.cg";
    b) or analyse the recording yourself using a audio editing tool, such as Cooledit/Adobe Audition.
    If you open that recording in such program, you will see a periodic signal - tone-silence-tone-silence-.... You need to measure three parameters:
    1. the duration of the tone period
    2. the duration of the silence period
    3. the frequency of the tone.
    If you get some experience using those programs, this should be very easy. For me that takes about half a minute, for example.
    Enter those parameters to the "fxocfg.cgi" and save.

    Best regards,
    David

  3. #3

    Default

    Quote Originally Posted by davrays View Post
    Darril, if such disconnect settings existed, they would have been applied by default by Epygi, as soon as you select SA as your locale...

    Unfortunately, in your beautiful country there are too many differents standards used (better to say - no standard is used) for disconnect tones.
    When doing trainings in SA I noticed several tones used by different telcos, and the FXO disconnection issues really look to be one of the bigger problems resellers face in SA.

    There are methods to resolve those problems however. The easiest is the following:
    1. Route your FXO line to some extension, which has voicemail service.
    2. In "Voice Mail Common Settings" set the "Recording Codec" to G.711u.
    3. Make an incoming call through that FXO and wait until the voicemail of the target extension activates. As soon as you listen the beep indicating that the voicemail recording is started, put down the handset.
    4. Wait for some time. During that time voicemail system will record the disconnection signal from your telco. Typically you have to wait 5 minutes, which equals to the Max mail duration on the extension by default (if you want it to be faster, decrease the "Maximum mail message duration" from the "Voice Mail Settings" of that extension before making the test call).
    5. Open the "Voice Mailbox" of that extension in the web browser, and download the voicemail.

    After that you have two choices:
    a) either send that to Epygi to analyse and give you the values to enter to the "fxocfg.cg";
    b) or analyse the recording yourself using a audio editing tool, such as Cooledit/Adobe Audition.
    If you open that recording in such program, you will see a periodic signal - tone-silence-tone-silence-.... You need to measure three parameters:
    1. the duration of the tone period
    2. the duration of the silence period
    3. the frequency of the tone.
    If you get some experience using those programs, this should be very easy. For me that takes about half a minute, for example.
    Enter those parameters to the "fxocfg.cgi" and save.

    Best regards,
    David
    Hi David

    Could you maybe elaborate on measuring the disconnect settings? I have Audition (same as Cool Edit) and have the recordings as you suggested.
    would you mind describing how to measure the following settings? (I've been Googling for a long time without success)


    Frequency1:
    Frequency2:
    Duration:
    Duration Disp:
    Silence:
    Silence Disp:
    Pattern Count:
    Disconnect Detection
    Disconnect Duration:
    Silence Detection
    Min Duration:
    Threshold:

    Many, many thanks

  4. #4
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    Hi Anton

    actually there are some links on the web, which can help you with this, though they are not easy to find. Here is one of them: http://forum.voxilla.com/linksys-sip...one-12874.html. The procedur described there, is similiar to what can be done for Quadro using Adobe Audition or CoolEdit...

    Actually you need to enable the Busy tone detection, and set only the "Frequency1", "Frequency2", "Duration", "Silence", "Pattern Count". The rest of the parameters can be left intact. Also enable the disconnect detection with default settings, as it is helpful to have that enabled in any case.

    Now about the busy disconnection signal:

    typical busy disconnection signal consists of several periods of tone (single of dual frequescy) and silence.

    1. What do Quadro parameters mean:
    The "Frequency1" is the main frequency used in the "tone" part of disconnection pattern. The "Frequncy2" is the second frequency (only actual if a dual-frequency signal is used by telco) used in the "tone" part of disconnection pattern. If the signal has just single frequency, then the "Frequency2" shoul be set to 0.
    The "Duration" parameter is the duration of the "tone" part in milliseconds. The "Silence" parameter is the duration of the "silence" part in milliseconds.
    The "Pattren Count" is the number of repetitions, after which the signal is recognised as the disconnect signal. It typically should be set to 3 or 2.

    2. How to determine the needed parameters:
    "Duration" can be determined by selecting the "tone" part of the signal and looking at the right-bottom corner of the Audition window ("Lenght" field). Typically should be something between 100 and 1500 msec.
    "Silence" can be determined by selecting the "silence" part of the signal and looking at the right-bottom corner of the Audition window ("Lenght" field). Typically should be something between 100 and 1500 msec.
    Frequencies can be found using Audition's "Analyse"->"Show Frequency Analys" menu (select the "tone" part only, then click on that menu item). As sooin as you call that, you will see a graph. Press on "Scan" to make the graph better. On the graph you will see one or two peaks. Point the mouse on the peak, and you will see the frequecny in the left-bottom corner of "Frequency Analysis" wondow (it is measured in Hz). If there is just one peak - it means you have single frequency tone, Frequency1=<what you see on the graph>, Frequency2=0. If you see two peaks: Frequency1=<highest peak on the graph>, Frequency2=<second peak on the graph>. Typically should be something between 200-1000 Hz (more commonly - between 300 and 700 Hz).

    Of course this will look better with screenshots, but I am not sure I can attach them here.. I'll see.

    UPDATE:

    Ok, here are attachments. They are in very poor quality, and to be honest this is not a true disconnect signal (though it is very similiar), but they can serve as an basic illustration.
    Fig 1: this is how disconnect signal looks
    Fig 2: shows how to measure the "tone" part duration
    Fig 3. shows how to measure the "silence" part duration
    Fig 4. shows how to measure frequences (here is a dual frequency tone, with two peaks very close to each other)
    Attached Images Attached Images

  5. #5

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    Thanks, that did the trick!

  6. #6

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    Davrays, would it be possible for me to send you the file I got on my voice mail to check the frequencies for Poland?

    I think my configuration of the voicemail is right but the pattern I get from the .wav file looks nothing like the one from your attachment.

    The strange thing is that the voice mail stops recording very quickly as if it was aware of the fact the call ended, but the extension keeps ringing long after caller disconnected and I get voicemail after each such scenario.

    I think I got three parameters:

    duration: 100
    silence: 130
    pattern: 1

  7. #7
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    If there is no pattern as shown above on the wav file, I suppose there is nothing to look for in that file... If voicemail really stops recrding quickly, it means the disconnect signal is ok. Another test you could do is to call from PSTN, pickup the call on any local extension, talk a bit to yourself , then terminate the call from PSTN side, and listen what happens on local extension phone. What you hear there? Also look/refresh at the "Active Calls" page to see how long you see that call there, after you have terminated it from PSTN.

    If the call disappears from the Active Calls table in 2-5 seconds, then apparently you have no problem with disconnect settings, and should look for the problem in different place. If the call stays in the table for long (20 seconds or more), then lets think further about how to catch the diosconnect signal.

  8. #8

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    After picking up a phone and disconnecting quickly the call gests terminated in the Active Calls" quickly (2sec) but if the call gets dropped before anyone answers it it stays in the active calls until it gets to the voice mail.

    If I pick up on Panasonic phone the incoming call and then disconnect I get a one and everlasting biiiiiiiii...

    If I pick up on Philips (other extension) phone the incoming call and then disconnect I get a series of quick bi.bi.bi.bi....

    I hope this helps to solve the mystery.

  9. #9
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    Well, this means you don't have regular fxo disconnection problem. The problem on your setup seems to happen because the Quadro doesn't recognise the end of ring signals from telco. Truly saying, I have never listened about such problem before... As far as I understand, you have tweaked some settings on the hidden fxocfg.cgi. May it be that you have touched the "Fxo Ring Stop Timeout" value on the same page? Try to set it to the default 7000. If that doesn't help, you can try to play with that setting a bit - set it to 5000 (it should work with standard Poland ring signal). Try other settings between 4000 and 10000 (I would not recommend to set it lower than 4000, as polish ring signal has 4 sec timeout between rings).
    If it makes no absolutely no effect, try setting it to 5000 and reboot the Quadro (I tell this because I am not 100% sure this setting applies without reboot).

    Hope this helps... If not, you'll have to contact Epygi support, so they can connect to the device and make some test calls while capturing actual fxo data. In any case, keep us informed.

  10. #10

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    Everything works fine for FXO connections now but what about the SIP connections?

    When I call SIP number and disconnect before someone answers the phone the problem remains. Is there a way to correct this?

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