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bilmar_gh at yahoo.com
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 Posted: Wed Mar 05, 2008 5:44 pm Post subject: [asterisk-users] Voice quality is bad from one side and good |
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Hi all;
I have two asterisk boxes installed in two separated
sites, the internet bandwidth between them is very
good and I am using G729 codec to communicate with
them and IAX.
The problem that side A hears well side B while side B
does not hear well side A !!
I did one thing in side B that in iax.conf, I set the
bandwidth=high and it helped, but still side B is
complaining from the quality (while its net is very
good).
Any advise what it could be the problem?
Regards
Bilal
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abalashov at evaristes...
Guest
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| Posted: Wed Mar 05, 2008 6:09 pm Post subject: [asterisk-users] Voice quality is bad from one side and good |
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bilal ghayyad wrote:
| Quote: | Hi all;
I have two asterisk boxes installed in two separated
sites, the internet bandwidth between them is very
good and I am using G729 codec to communicate with
them and IAX.
|
Try playing around with the adaptive / fixed jitter buffer settings for
IAX2. Also, if it's consistently a problem found on one side, consider
any resource consumption and/or processing issues that may be occuring
on the sending side that is creating the problem.
Is this "very good bandwidth" just good bandwidth, or also good latency,
by which we really mean _consistent_ latency? Or is it highly bursty
and variable? This will create jitter and break voice, even if the
amount of potential throughput is very high. Consider satellite links
if you need a good example.
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599 |
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stotaro at totarotechn...
Guest
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| Posted: Wed Mar 05, 2008 6:53 pm Post subject: [asterisk-users] Voice quality is bad from one side and good |
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On Wed, Mar 5, 2008 at 6:09 PM, Alex Balashov <abalashov at evaristesys.com> wrote:
| Quote: | bilal ghayyad wrote:
| Quote: | Hi all;
I have two asterisk boxes installed in two separated
sites, the internet bandwidth between them is very
good and I am using G729 codec to communicate with
them and IAX.
|
Try playing around with the adaptive / fixed jitter buffer settings for
IAX2. Also, if it's consistently a problem found on one side, consider
any resource consumption and/or processing issues that may be occuring
on the sending side that is creating the problem.
Is this "very good bandwidth" just good bandwidth, or also good latency,
by which we really mean _consistent_ latency? Or is it highly bursty
and variable? This will create jitter and break voice, even if the
amount of potential throughput is very high. Consider satellite links
if you need a good example.
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599
|
Try using SIP. Post back with results.
Thanks,
Steve Totaro |
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stotaro at totarotechn...
Guest
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| Posted: Wed Mar 05, 2008 6:56 pm Post subject: [asterisk-users] Voice quality is bad from one side and good |
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On Wed, Mar 5, 2008 at 6:53 PM, Steve Totaro
<stotaro at totarotechnologies.com> wrote:
| Quote: | On Wed, Mar 5, 2008 at 6:09 PM, Alex Balashov <abalashov at evaristesys.com> wrote:
| Quote: | bilal ghayyad wrote:
| Quote: | Hi all;
I have two asterisk boxes installed in two separated
sites, the internet bandwidth between them is very
good and I am using G729 codec to communicate with
them and IAX.
|
Try playing around with the adaptive / fixed jitter buffer settings for
IAX2. Also, if it's consistently a problem found on one side, consider
any resource consumption and/or processing issues that may be occuring
on the sending side that is creating the problem.
Is this "very good bandwidth" just good bandwidth, or also good latency,
by which we really mean _consistent_ latency? Or is it highly bursty
and variable? This will create jitter and break voice, even if the
amount of potential throughput is very high. Consider satellite links
if you need a good example.
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599
|
Try using SIP. Post back with results.
Thanks,
Steve Totaro
|
Sorry to reply to my own post but if NAT is an issue, consider OpenVPN
and SIP. I bet your calls become crystal clear, if not, try GSM
instead of G729. Actually, that might be where you want to start if
changing to SIP is non-trivial in your setup.
Thanks,
Steve Totaro |
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abalashov at evaristes...
Guest
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| Posted: Wed Mar 05, 2008 7:56 pm Post subject: [asterisk-users] Voice quality is bad from one side and good |
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Steve Totaro wrote:
| Quote: | Try using SIP. Post back with results.
|
Or that. Certainly, my own experiences with IAX2 would support this
conclusion.
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599 |
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