Best Voip

Discussion in 'UK VOIP' started by ddd, May 8, 2007.

  1. ddd

    ddd Guest

    Hi

    We live in an area where ADSL is available (512/12), but we are a long way
    from the excahnge, which is reducing our Upload speed. We can hear people,
    but they have problems hearing us

    Which VoIP needs the least Upload capacity to work very well?

    Thanks folks
     
    ddd, May 8, 2007
    #1
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  2. ddd

    Herman Guest

    "ddd" <dddd.net> wrote in message
    news:...
    > Hi
    >
    > We live in an area where ADSL is available (512/12), but we are a long way
    > from the excahnge, which is reducing our Upload speed. We can hear people,
    > but they have problems hearing us
    >
    > Which VoIP needs the least Upload capacity to work very well?
    >
    > Thanks folks
    >

    In theory, any provider using SIP should be able to service with this
    bandwidth. It all depends on the codec your equipment uses and your ITSP
    supports (see http://www.en.voipforo.com/codec/codecs.php). However, at 12
    Kbps, I could imagine that the quality would be pretty much unusable. Also,
    there could be more chance of ADSL connection dropping. Bear in mind that
    you would normally have to have at least 90 Kbps in both directions to have
    quality comparable to a POTS service.

    My advice is to try to play about with the codecs your equipment uses. If
    calls cannot then be connected, it may be because your ITSP does not suport
    that codec. If the calls do succeed, you need to make the decision whether
    the quality is acceptable. My personal opinion (based on experience with
    solely high speed connections) is that the quality will not be acceptable.
     
    Herman, May 8, 2007
    #2
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  3. ddd

    Paul Hayes Guest

    ddd wrote:
    > Hi
    >
    > We live in an area where ADSL is available (512/12), but we are a long way
    > from the excahnge, which is reducing our Upload speed. We can hear people,
    > but they have problems hearing us
    >
    > Which VoIP needs the least Upload capacity to work very well?
    >
    > Thanks folks
    >
    >


    Is that a typing error or are you really getting 12kbps upstream speed?
    You wont get VoIP to work using such a slow speed no matter what you
    do. G.729 requires about 30kbps in either direction for a slight
    sacrifice in voice quality. In reality you'll probably need at least a
    56kbps connection. You'll find most VoIP service providers support the
    g729 codec and most commercial hardware does to. If you are using
    Asterisk you'll have to buy licenses from Digium for about £20 each.

    cheers,
    Paul.
     
    Paul Hayes, May 8, 2007
    #3
  4. ddd

    Panda Guest

    On May 8, 9:21 am, "ddd" <dddd.net> wrote:
    > Hi
    >
    > We live in an area where ADSL is available (512/12), but we are a long way
    > from the excahnge, which is reducing our Upload speed. We can hear people,
    > but they have problems hearing us
    >
    > Which VoIP needs the least Upload capacity to work very well?
    >
    > Thanks folks


    Hi,

    Check the following link:
    http://forums.networkingland.com/showthread.php?t=6158

    for the exact bandwidth consumed by most VoIP codecs.

    As you can see G.723 is the minimum among all with around 20Kbps over
    all bandwidth consumption.

    You must have some kind of QoS to get clear sound for both ends and
    higher ADSL bandwidth other wise it's impossible to have decent VoIP.


    Panda,
    http://forums.networkingland.com
     
    Panda, May 8, 2007
    #4
  5. ddd

    ddd Guest

    Sorry should be 128 up speed - theoretical

    "ddd" <dddd.net> wrote in message
    news:...
    > Hi
    >
    > We live in an area where ADSL is available (512/12), but we are a long way
    > from the excahnge, which is reducing our Upload speed. We can hear people,
    > but they have problems hearing us
    >
    > Which VoIP needs the least Upload capacity to work very well?
    >
    > Thanks folks
    >
    >
     
    ddd, May 8, 2007
    #5
  6. ddd

    ddd Guest

    What do people think of the www.testyourvoip.com for testing quality

    These are my results

    Time Source IP Target Codec MOS To MOS From
    05/08/07 07:00 AM EDT 91.184.192.3 London G.711 4.0 4.4
    05/08/07 06:59 AM EDT 91.184.192.3 Helsinki G.711 3.8 4.1
    05/08/07 06:58 AM EDT 91.184.192.3 London G.711 3.4 4.3
    05/08/07 06:55 AM EDT 91.184.192.3 London G.711 3.5 4.3
    05/08/07 06:54 AM EDT 91.184.192.3 London G.711 3.8 4.3
    05/08/07 02:42 AM EDT 91.184.192.3 London G.711 3.8 3.9
    05/04/07 12:53 AM EDT 91.184.192.3 London G.711 3.3 3.7
    05/04/07 12:52 AM EDT 91.184.192.3 Helsinki G.711 4.2 3.7
    05/04/07 12:52 AM EDT 91.184.192.3 London G.711 2.8 3.8
    05/04/07 12:51 AM EDT 91.184.192.3 London G.711 3.4 3.5
    05/03/07 03:17 AM EDT 91.184.192.3 London G.729 3.2 3.9
    05/03/07 03:16 AM EDT 91.184.192.3 Sydney G.711 2.6 2.1
    05/03/07 03:16 AM EDT 91.184.192.3 London G.711 3.7 4.2
    05/03/07 03:13 AM EDT 91.184.192.3 London G.711 3.3 3.5
    05/03/07 03:11 AM EDT 91.184.192.3 London G.711 3.2 3.6
    05/03/07 03:09 AM EDT 91.184.192.3 London G.711 2.9 3.8
    05/03/07 03:08 AM EDT 91.184.192.3 London G.711 2.6 4.1
    04/30/07 10:02 AM EDT 91.184.192.3 London G.711 1.2 1.9
    04/30/07 10:01 AM EDT 91.184.192.3 London G.711 1.3 2.1
    04/30/07 10:00 AM EDT 91.184.192.3 London G.711 3.0 3.9
    04/30/07 09:59 AM EDT 91.184.192.3 London G.711 2.6 3.8
    04/30/07 09:58 AM EDT 91.184.192.3 London G.711 3.9 4.2
    04/30/07 09:56 AM EDT 82.214.223.1 London G.711 1.9 2.1
    04/30/07 09:55 AM EDT 82.214.223.1 London G.711 2.6 2.7
    04/30/07 09:17 AM EDT 91.184.192.3 London G.711 3.9 4.1
    04/30/07 09:16 AM EDT 91.184.192.3 London G.711 3.2 3.9
    04/30/07 09:15 AM EDT 91.184.192.3 London G.711 3.6 3.8
    04/30/07 09:10 AM EDT 91.184.192.3 London G.711 1.2 1.4
    04/30/07 09:01 AM EDT 91.184.192.3 London G.711 1.1 2.3
    04/30/07 08:59 AM EDT 91.184.192.3 London G.711 4.2 4.4
    04/30/07 08:45 AM EDT 91.184.192.3 London G.711 3.8 3.8
    04/30/07 08:37 AM EDT 91.184.192.3 London G.711 3.9 4.1
    04/30/07 08:35 AM EDT 91.184.192.3 London G.711 3.8 3.9
    04/30/07 08:17 AM EDT 91.184.192.3 London G.711 3.7 4.2
    04/30/07 08:16 AM EDT 91.184.192.3 London G.711 3.5 4.0
    04/30/07 08:13 AM EDT 91.184.192.3 London G.711 3.8 3.9
    04/30/07 08:11 AM EDT 91.184.192.3 London G.711 4.0 4.0
     
    ddd, May 8, 2007
    #6
  7. ddd

    Paul Hayes Guest

    ddd wrote:
    > Sorry should be 128 up speed - theoretical
    >
    > "ddd" <dddd.net> wrote in message
    > news:...
    >> Hi
    >>
    >> We live in an area where ADSL is available (512/12), but we are a long way
    >> from the excahnge, which is reducing our Upload speed. We can hear people,
    >> but they have problems hearing us
    >>
    >> Which VoIP needs the least Upload capacity to work very well?
    >>
    >> Thanks folks
    >>
    >>

    >
    >


    OK, I thought as much. I guess you aren't actually getting that speed.
    Try using g729 codec for a bit and see if it makes a difference.

    Implementing QoS might be necessary too if you have other applications
    using the Internet connection at the same time.

    cheers,
    Paul.
     
    Paul Hayes, May 8, 2007
    #7
  8. ddd

    ddd Guest

    At the moment I am trying Tesco Internet Phone. Can the codec be changed
    with this?
    "Paul Hayes" <> wrote in message
    news:46406169$0$646$...
    > ddd wrote:
    >> Sorry should be 128 up speed - theoretical
    >>
    >> "ddd" <dddd.net> wrote in message
    >> news:...
    >>> Hi
    >>>
    >>> We live in an area where ADSL is available (512/12), but we are a long
    >>> way from the excahnge, which is reducing our Upload speed. We can hear
    >>> people, but they have problems hearing us
    >>>
    >>> Which VoIP needs the least Upload capacity to work very well?
    >>>
    >>> Thanks folks
    >>>
    >>>

    >>
    >>

    >
    > OK, I thought as much. I guess you aren't actually getting that speed.
    > Try using g729 codec for a bit and see if it makes a difference.
    >
    > Implementing QoS might be necessary too if you have other applications
    > using the Internet connection at the same time.
    >
    > cheers,
    > Paul.
    >
     
    ddd, May 8, 2007
    #8
  9. ddd

    News Reader Guest

    "ddd" <dddd.net> wrote in message
    news:...
    > Hi
    >
    > We live in an area where ADSL is available (512/12), but we are a long way
    > from the excahnge, which is reducing our Upload speed. We can hear people,
    > but they have problems hearing us
    >
    > Which VoIP needs the least Upload capacity to work very well?
    >
    > Thanks folks
    >


    Hi,


    Can I suggest you trying going to www.speedtest.com and report the results
    to us.

    Please ensure that nothing / no one else is using the internet / connection
    at the time.

    Thanks.


    Best wishes,



    News Reader
     
    News Reader, May 8, 2007
    #9
  10. ddd

    News Reader Guest

    "News Reader" <> wrote in message
    news:f1q97r$rv0$...
    >
    > "ddd" <dddd.net> wrote in message
    > news:...
    >> Hi
    >>
    >> We live in an area where ADSL is available (512/12), but we are a long
    >> way from the excahnge, which is reducing our Upload speed. We can hear
    >> people, but they have problems hearing us
    >>
    >> Which VoIP needs the least Upload capacity to work very well?
    >>
    >> Thanks folks
    >>

    >
    > Hi,
    >
    >
    > Can I suggest you trying going to www.speedtest.com and report the results
    > to us.
    >
    > Please ensure that nothing / no one else is using the internet /
    > connection at the time.
    >
    > Thanks.
    >
    >
    > Best wishes,
    >
    >
    >
    > News Reader
    >
    >
    >




    Hi,


    Ooopppss.... www.speedtest.net


    Thanks,




    News Reader
     
    News Reader, May 8, 2007
    #10
  11. ddd

    ddd Guest

    422 kb/s down

    43 kb/s up

    Hope that helps

    Thanks
     
    ddd, May 9, 2007
    #11
  12. ddd

    News Reader Guest

    "ddd" <dddd.net> wrote in message
    news:...
    > 422 kb/s down
    >
    > 43 kb/s up
    >
    > Hope that helps
    >
    > Thanks
    >



    Hi,


    Yep... you are right on the limit their with your upstream. I don't know if
    you may be able to change away from RADSL (i.e. not have rate adaptive adsl
    which reduces upstream to maximise downstream) or try a 256kbp/s type
    service which should help maintain / support better upstream.

    Anyhow, that would require a deal more consideration, discussion,
    investigation, etc.

    Turning to the key point. At 43 k you are on the limit - iLBC or Speex (or
    possibly GSM or G.729) (I think they are) might just fit - but you have to
    allow 10% on either side for protocol overhead, packet headers, etc.

    The list a fellow poster suggested seems very good for showing you this:

    http://www.en.voipforo.com:80/codec/codecs.php

    (You will see that quite a few will fit within your [call it a "working"] 35
    kbps)


    I can't claim to know a great deal about Tesco Internet Phone services...
    but generally the more "branded" or packaged services tend not to allow so
    much low level configuration or setting adjustment. However, some do! You
    could look in the user manuals or any accompanying software for "low
    bandwidth" or similar options (perhaps some might mention for use with low
    bandwidth dial-up 56k modems). Otherwise, I understand that you can use the
    physical Tesco Internet Phone with other software / softphones (such as the
    very good X-Lite software - I believe / understand) and then you can choose
    one of many very good providers (telecoms side providers) and they will
    mostly support a range of codecs - typically including the more common g*
    series of codecs and sometimes iLBC and speex, etc. You can always
    experiment for free using X-Lite and various free test numbers (you do not
    have to even register with any to call them and you can try turning on / off
    different codecs in X-Lite and see what works well - perhaps for example,
    using a free VoIP echo test number, etc.).

    Hope some of this is some use - at least to give you a bit more information
    or to get you started.

    I am sure others here and elsewhere would be able to help you further as
    well :) .


    Best wishes,



    News Reader
     
    News Reader, May 9, 2007
    #12
  13. ddd

    News Reader Guest

    "News Reader" <> wrote in message
    news:f1sup1$kgh$...
    >
    > "ddd" <dddd.net> wrote in message
    > news:...
    >> 422 kb/s down
    >>
    >> 43 kb/s up
    >>
    >> Hope that helps
    >>
    >> Thanks
    >>

    >
    >
    > Hi,
    >
    >
    > Yep... you are right on the limit their with your upstream. I don't know
    > if you may be able to change away from RADSL (i.e. not have rate adaptive
    > adsl which reduces upstream to maximise downstream) or try a 256kbp/s type
    > service which should help maintain /



    <SNIP>


    >
    > Best wishes,
    >
    >
    >
    > News Reader
    >
    >
    >



    P.s. It might be a good idea to double check with your ISP that this is a
    genuine issue of line length and not for example capacity problems on their
    side, etc.
     
    News Reader, May 9, 2007
    #13
  14. ddd

    Hongtian Guest

    On 8 May, 15:21, "ddd" <dddd.net> wrote:
    > Hi
    >
    > We live in an area where ADSL is available (512/12), but we are a long way
    > from the excahnge, which is reducing our Upload speed. We can hear people,
    > but they have problems hearing us
    >
    > Which VoIP needs the least Upload capacity to work very well?
    >
    > Thanks folks


    I think iLBC or SpeeX codec can fit your requirement, but it depends
    on whether your SIP softphone or SIP client can support it or not.
     
    Hongtian, May 10, 2007
    #14
  15. ddd

    Hongtian Guest

    On 8 May, 15:21, "ddd" <dddd.net> wrote:
    > Hi
    >
    > We live in an area where ADSL is available (512/12), but we are a long way
    > from the excahnge, which is reducing our Upload speed. We can hear people,
    > but they have problems hearing us
    >
    > Which VoIP needs the least Upload capacity to work very well?
    >
    > Thanks folks


    If your SIP softphone can support iLBC or SpeeX but your SIP provider
    cannot support them, I think you have to establish your own VOIP
    environment. In this case, Asterisk or miniSipServer is a good choice.
     
    Hongtian, May 10, 2007
    #15
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