[asterisk-users] Re: Re: Help - Poor Voice Quality

[Jim Duda]

Tim,

> What sort of 'poor' quality are we talking about - when folks  complain what words do they use?
On the other end, folks complain that the voice drops out.  Words are lost.  It's very frustrating to communicate.

> Which codec(s) are you using?
ULAW

> How many channels do you want to use at once ?
1 is fine.  This is basic home use.

> What is the round-trip time between you and the teliax server ?
The ping responses are on the order of 15mS.
I ran mtr, teliax is 10 hops away, and I don't see any packet loss.
I was just on the phone with my house, and the call sounded just fine at this time (problems come and go).

This is the dump of iax2 show netstats while the call was up.

                                -------- LOCAL ---------------------  -------- REMOTE --------------------
Channel                    RTT  Jit  Del  Lost   %  Drop  OOO  Kpkts  Jit  Del  Lost   %  Drop  OOO  Kpkts
IAX2/teliax-2               37   -1    0    -1  -1     0   -1      5    0   40     0   0     0    0      0

> Do you have the jitterbuffer on or off ?
I don't believe so.  I didn't turn jitter on.  I believe jitter is off by default.

Thanks,

Jim

"Tim Panton" <tim at mexuar.com> wrote in message news:4103F573-DC3F-481A-9319-923DA0D3F863 at mexuar.com...
>
> On 7 Feb 2007, at 03:59, Jim Duda wrote:
>
>> Thanks for the reply Lacy.
>>
>> Yes, I know that I am using IAX2 and not SIP for my connection to  teliax.  IAX2 is the preferred protocol for
>> connection to teliax.   I have the firewall configured to prioritorize port 4569 for IAX2.
>>
>> I have the shorewall tcdevices file setup with 3 mbit download and  500 Kbit upload speeds.
>
> We need a few clues :-)
> What sort of 'poor' quality are we talking about - when folks  complain what words do they use?
> Which codec(s) are you using?
> How many channels do you want to use at once ?
> What is the round-trip time between you and the teliax server ?
>
> Do you have the jitterbuffer on or off ? (if you only have 6ms of  jitter, I'd
> switch it off....)
>
> Tim Panton
>
> www.mexuar.net
> www.westhawk.co.uk/
>
>
>
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