Improving X-Lite sound quality
 

My broadband uplink speed is only 64kb. I presume this is the main
reason for the fact that people I call using X-Lite softphone tell me
they have problems hearing me (even though I can hear them crystal
clear). Is it worth my playing with the codecs to try to improve the
situation and is there somewhere that describes the pros and cons of
the various codecs. Is there any other tuning I can do?

Re: Improving X-Lite sound quality
 

"Al" <e@aa.invalid> wrote in message
news:921681lmgkcopqgegjr7qbg36ntbb56e59@4ax.com...
> My broadband uplink speed is only 64kb. I presume this is the main
> reason for the fact that people I call using X-Lite softphone tell me
> they have problems hearing me (even though I can hear them crystal
> clear). Is it worth my playing with the codecs to try to improve the
> situation and is there somewhere that describes the pros and cons of
> the various codecs. Is there any other tuning I can do?

Basicly choose ilbc g723 or g729

BUT in the end you need to sort out your connetion speed. G711 uses aprox
80K each way. What type of broadband do you have that is only 64K?

Ian

Re: Improving X-Lite sound quality
 

"Al" <e@aa.invalid> wrote in message
news:921681lmgkcopqgegjr7qbg36ntbb56e59@4ax.com...
> My broadband uplink speed is only 64kb. I presume this is the main
> reason for the fact that people I call using X-Lite softphone tell me
> they have problems hearing me (even though I can hear them crystal
> clear). Is it worth my playing with the codecs to try to improve the
> situation and is there somewhere that describes the pros and cons of
> the various codecs. Is there any other tuning I can do?

Not much of a "broadband" service then, is it..? I suggest you complain to
your ISP, or find a decent one. For SIP calls you need a minimum of 80k
each way to get decent quality.

Who on earth is calling 64k "broadband" then..? Never heard of anything so
daft.

Ivor

Re: Improving X-Lite sound quality
 

On Thu, 12 May 2005 11:50:00 +0100, "Ivor Jones"
<ivor@despammed.invalid> wrote:

>Who on earth is calling 64k "broadband" then..? Never heard of anything so
>daft.

upstream on Cable is usually fairly modest.

Phil
--
spamcop.net address commissioned 18/06/04
Come on down !

Re: Improving X-Lite sound quality
 

Phil Thompson wrote:
> On Thu, 12 May 2005 11:50:00 +0100, "Ivor Jones"
> <ivor@despammed.invalid> wrote:
>
>> Who on earth is calling 64k "broadband" then..? Never heard of
>> anything so daft.
>
> upstream on Cable is usually fairly modest.

My mate has Blueyonder's basic 256k service, his upload is 128k.

Ivor

Re: Improving X-Lite sound quality
 

On Thu, 12 May 2005 15:34:03 +0100, "Ivor Jones"
<ivor@despammed.invalid> wrote:

>My mate has Blueyonder's basic 256k service, his upload is 128k.

NTL have 64k upstream on their basic 150k service
http://www.home.ntl.com/page/broadbandquestions

Phil

Re: Improving X-Lite sound quality
 

On Thu, 12 May 2005 11:15:12 +0100, "Ian" <spam"AT"bathfordhill.co.uk>
wrote:

>Basicly choose ilbc g723 or g729

Currently I have both G711a and GSM set. I've no idea how I came to
this since I have no idea what exactly these codecs are used for and
what the criteria is for choosing one. Is there some simple
explanation somewhere for a beginner to make sense of all these
strange sets of characters?

Also, should I set just a SINGLE codec or what? It really would be
helpful if there was some simple information I could refer to to try
to understand these "codecs" and how to use them.

>BUT in the end you need to sort out your connetion speed. G711 uses aprox
>80K each way. What type of broadband do you have that is only 64K?

ntl 300kb download and 64kb upload, so I'm told. As I think I said at
the start, incoming speech quality is crystal clear and barely
distinguishable from PSTN. I'm often told by the receiving end that my
speech sounds "garbled". Since I can't personally can't hear what I
sound like at the other end, it's hard to interpret exactly what the
recipient is reporting. However, from time to time I've had no
complaints at all from the other end.

Re: Improving X-Lite sound quality
 

Phil Thompson wrote:
|| On Thu, 12 May 2005 15:34:03 +0100, "Ivor Jones"
|| <ivor@despammed.invalid> wrote:
||
||| My mate has Blueyonder's basic 256k service, his upload is 128k.
||
|| NTL have 64k upstream on their basic 150k service
|| http://www.home.ntl.com/page/broadbandquestions
||
|| Phil

.................I worked for NTL up until 28 Feb 05...........they were just
about to increase their 300k speed to 1Mb.....has this not happened yet?

They haven't done a 150k speed for months & months.

Re: Improving X-Lite sound quality
 

"Al" <e@aa.invalid> wrote in message
news:os578151hgs6rlj82tg71m06l7fo5mj1gd@4ax.com...
> On Thu, 12 May 2005 11:15:12 +0100, "Ian" <spam"AT"bathfordhill.co.uk>
> wrote:
>
> >Basicly choose ilbc g723 or g729
>
> Currently I have both G711a and GSM set. I've no idea how I came to
> this since I have no idea what exactly these codecs are used for and
> what the criteria is for choosing one. Is there some simple
> explanation somewhere for a beginner to make sense of all these
> strange sets of characters?
>
> Also, should I set just a SINGLE codec or what? It really would be
> helpful if there was some simple information I could refer to to try
> to understand these "codecs" and how to use them.
>
Yes just set GSM

Simple realy

G711 is 64K + overheads = 80K
G729 is 8K + Overheads = 18K
GSM is 13K + Overheads = 21K

THESE are all Approx from memory.


> >BUT in the end you need to sort out your connetion speed. G711 uses aprox
> >80K each way. What type of broadband do you have that is only 64K?
>
> ntl 300kb download and 64kb upload, so I'm told. As I think I said at
> the start, incoming speech quality is crystal clear and barely
> distinguishable from PSTN. I'm often told by the receiving end that my
> speech sounds "garbled". Since I can't personally can't hear what I
> sound like at the other end, it's hard to interpret exactly what the
> recipient is reporting. However, from time to time I've had no
> complaints at all from the other end.

Yep sounds right, 80K down a 64K pipe just don't go.
If you want to take advantage of Voip upgrade so you have 80K + 40% extra at
least.

Good luck Ian

Re: Improving X-Lite sound quality
 

On Thu, 12 May 2005 18:16:35 GMT, The Cable Guy wrote:

>................I worked for NTL up until 28 Feb 05...........they were just
>about to increase their 300k speed to 1Mb.....has this not happened yet?

Yes, it's an optional upgrade. There is a sting in the tail though:
the upgraded offering is capped (unlike the 300kb offering). I'm not
happy with the capping and, instead of upgrading, they've offered me a
price reduction for staying at 300kb.