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bilmar_gh at yahoo.com
Guest
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 Posted: Wed May 21, 2008 6:28 am Post subject: [asterisk-users] speex, ilbc and g729 codecs, GSM with IAX |
 |
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Dears;
I do not know if any had experience in using speex or
ilbc with IAX and got good results, because I am
facing a problem with GSM.
I am facing a noise problem when I am using GSM with
IAX trunk as following:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXO) to terminate the call to the destination
While no noise happen if that senario is happening:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXS) to an extension
I tried to use GSM with IAX trunk, and actually I got
a problem that: when I am using IP Phone (Polycom 320,
with G711 codec) and placed a call, that call will go
via the IAX trunk to the remote Asterisk Box, then
using the Digium TDM22B card to terminate the call via
the PSTN analoge lines, there is a noise coming with
the voice! This noise does not appear if we do not use
the "IAX trunk and if the call is not going to be
terminated via the Digium Card (FXO) on the remote
Asterisk Box (if we use IAX trunk and we call an
extension (FXS) on a remote Asterisk but not the PSTN
and the FXO on the remote Asterisk, then no noise
appear).
So the noise happen only in that senario:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXO) to terminate the call to the destination
While no noise happen if that senario is happening:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXS) to an extension
I do not know if it is a matter of the GSM codec, or
if it is related to the digium card that it is the old
model.
But any one can advise if speex or ilbc will give
better performance than GSM with IAX trunk?
Any advise?
Regards
Bilal
--------------------
bilal ghayyad wrote:
| Quote: | Hi List;
Anyone tried to use speex, ilbc and g729 and come
|
back
| Quote: | with a preferred one in the quality?
Regards
Bilal
|
____________________________________________________________________________________
| Quote: | Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
_______________________________________________
-- Bandwidth and Colocation Provided by
|
http://www.api-digital.com --
| Quote: |
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
|
http://lists.digium.com/mailman/listinfo/asterisk-users
Depends on what you're using it for. We've had
excellent luck with
iLBC
for voice quality and g729 as well. Speex is better
than GSM, but not
spectacularly.
The problem with all of them of course, is
transcoding. They have less
of a bandwidth footprint for acceptable quality, but
more of a
processor
footprint.
N. |
|
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stotaro at totarotechn...
Guest
|
| Posted: Wed May 21, 2008 7:11 am Post subject: [asterisk-users] speex, ilbc and g729 codecs, GSM with IAX |
|
|
On Wed, May 21, 2008 at 7:28 AM, bilal ghayyad <bilmar_gh at yahoo.com> wrote:
| Quote: | Dears;
I do not know if any had experience in using speex or
ilbc with IAX and got good results, because I am
facing a problem with GSM.
I am facing a noise problem when I am using GSM with
IAX trunk as following:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXO) to terminate the call to the destination
While no noise happen if that senario is happening:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXS) to an extension
I tried to use GSM with IAX trunk, and actually I got
a problem that: when I am using IP Phone (Polycom 320,
with G711 codec) and placed a call, that call will go
via the IAX trunk to the remote Asterisk Box, then
using the Digium TDM22B card to terminate the call via
the PSTN analoge lines, there is a noise coming with
the voice! This noise does not appear if we do not use
the "IAX trunk and if the call is not going to be
terminated via the Digium Card (FXO) on the remote
Asterisk Box (if we use IAX trunk and we call an
extension (FXS) on a remote Asterisk but not the PSTN
and the FXO on the remote Asterisk, then no noise
appear).
So the noise happen only in that senario:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXO) to terminate the call to the destination
While no noise happen if that senario is happening:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXS) to an extension
I do not know if it is a matter of the GSM codec, or
if it is related to the digium card that it is the old
model.
But any one can advise if speex or ilbc will give
better performance than GSM with IAX trunk?
Any advise?
Regards
Bilal
--------------------
bilal ghayyad wrote:
| Quote: | Hi List;
Anyone tried to use speex, ilbc and g729 and come
|
back
| Quote: | with a preferred one in the quality?
Regards
Bilal
|
____________________________________________________________________________________
| Quote: | Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
_______________________________________________
-- Bandwidth and Colocation Provided by
|
http://www.api-digital.com --
| Quote: |
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
|
http://lists.digium.com/mailman/listinfo/asterisk-users
Depends on what you're using it for. We've had
excellent luck with
iLBC
for voice quality and g729 as well. Speex is better
than GSM, but not
spectacularly.
The problem with all of them of course, is
transcoding. They have less
of a bandwidth footprint for acceptable quality, but
more of a
processor
footprint.
N.
|
I would check the "old" digium card first. Check interrupts and all.
Describe the "noise".
I am inclined to to think it is a hardware issue since it only
exhibits itself when using the Digium card.
Thanks,
Steve Totaro |
|
| Back to top |
|
|
stotaro at totarotechn...
Guest
|
| Posted: Wed May 21, 2008 7:13 am Post subject: [asterisk-users] speex, ilbc and g729 codecs, GSM with IAX |
|
|
On Wed, May 21, 2008 at 8:11 AM, Steve Totaro
<stotaro at totarotechnologies.com> wrote:
| Quote: | On Wed, May 21, 2008 at 7:28 AM, bilal ghayyad <bilmar_gh at yahoo.com> wrote:
| Quote: | Dears;
I do not know if any had experience in using speex or
ilbc with IAX and got good results, because I am
facing a problem with GSM.
I am facing a noise problem when I am using GSM with
IAX trunk as following:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXO) to terminate the call to the destination
While no noise happen if that senario is happening:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXS) to an extension
I tried to use GSM with IAX trunk, and actually I got
a problem that: when I am using IP Phone (Polycom 320,
with G711 codec) and placed a call, that call will go
via the IAX trunk to the remote Asterisk Box, then
using the Digium TDM22B card to terminate the call via
the PSTN analoge lines, there is a noise coming with
the voice! This noise does not appear if we do not use
the "IAX trunk and if the call is not going to be
terminated via the Digium Card (FXO) on the remote
Asterisk Box (if we use IAX trunk and we call an
extension (FXS) on a remote Asterisk but not the PSTN
and the FXO on the remote Asterisk, then no noise
appear).
So the noise happen only in that senario:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXO) to terminate the call to the destination
While no noise happen if that senario is happening:
IP Phone (G711) ---> Local Asterisk Box ---> IAX Trunk
using GSM codec ---> Remote Asterisk Box ---> Digium
Card (FXS) to an extension
I do not know if it is a matter of the GSM codec, or
if it is related to the digium card that it is the old
model.
But any one can advise if speex or ilbc will give
better performance than GSM with IAX trunk?
Any advise?
Regards
Bilal
--------------------
bilal ghayyad wrote:
| Quote: | Hi List;
Anyone tried to use speex, ilbc and g729 and come
|
back
| Quote: | with a preferred one in the quality?
Regards
Bilal
|
____________________________________________________________________________________
| Quote: | Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
_______________________________________________
-- Bandwidth and Colocation Provided by
|
http://www.api-digital.com --
| Quote: |
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
|
http://lists.digium.com/mailman/listinfo/asterisk-users
Depends on what you're using it for. We've had
excellent luck with
iLBC
for voice quality and g729 as well. Speex is better
than GSM, but not
spectacularly.
The problem with all of them of course, is
transcoding. They have less
of a bandwidth footprint for acceptable quality, but
more of a
processor
footprint.
N.
|
I would check the "old" digium card first. Check interrupts and all.
Describe the "noise".
I am inclined to to think it is a hardware issue since it only
exhibits itself when using the Digium card.
Thanks,
Steve Totaro
|
Second thought to consider, I have seen FXO modules go bad where they
generate noise but do not completely die. Can you route the call to
different FXO modules and see if it makes a difference?
Thanks,
Steve Totaro |
|
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