On 28/10/2013 4:12 PM, Mark Wiater wrote:
On 10/28/2013 3:59 PM, Ron Wheeler said:
I am reaching the same level of frustration.
I have tried to find the source of the problems.
We have IAX2 to our VoIP provider and SIP phones attached to the
Asterisk - No analogue.
I don't have any problems with IAX, but I hear some do.
I have now switched to SIP and will check the quality in the morning.
We have a very lightly loaded 60 Mbs cable link to the Internet that
tests pretty close to that most of the time.
Bandwidth is less important than the overall quality of the internet
link, latency and jitter. Either way, there is no QoS on the internet,
all bets are off.
The codec can matter too. What are you using?
G711
I have not found any good tools to track down the causes of poor
voice quality.
In my case, I have good incoming quality and terrible quality going out.
Oh, is your cable connection assymetric? Upload smaller than download?
If so, that correlates to terrible audio, right?
Just ran a test 50 Mbps download 10Mbps upload. Should be enough I hope.
That is, I can hear people perfectly well but they complain that my
voice drops out and is garbled regardless of who places the call.
As a result, I use Skype for all of my calls and if someone calls
me, I call them back on Skype if they have any problems.
I don't understand why Skype works so well and Asterisk works so
poorly on the same environment.
Googling "Asterisk poor audio quality" return several hundred
thousand references
I'd not shoot asterisk yet. I'd focus on the internet connection and
it's components (cable modem) first.
Good idea. I am sure that you are right but what to test and how are not
clear.
I use asterisk all over the place. Mostly connected to PRI's and
Carrier provided SIP trunks, with internet SIP trunks as backup. I get
complaints on the Internet based SIP trunks sometimes, never on other
other two.
I'd ask most of these questions of the OP too. Overall telephony
design matters.
--
Ron Wheeler
President
Artifact Software Inc
email: [email protected]
skype: ronaldmwheeler
phone: 866-970-2435, ext 102
--
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