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

[James Fromm]

Jim,

I too am a Teliax user.  Talk to their technical support. IAX2 is NOT 
preferred.  They'll tell you to use SIP.

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.
> 
> Jim
> 
> Lacy Moore wrote:
>> Jim Duda wrote:
>>> I've been on the shorewall firewall and confirmed that I have the
>>> firewall configured properly for VOIP QOS.
>>>
>> What exactly have you done here?  You do know that you are apparently
>> using IAX2 and not SIP.  Those are not the same protocols.  In fact, if
>> you configured the shorewall system for standard VoIP, that's your
>> problem.  IAX2 operates on different ports that SIP.  Whereas SIP
>> operates on a control port and then create media ports, IAX2 only uses 
>> one.
>>
>> As far as download speed, what have you told shorewall your download
>> speed is?  I'm not familiar with it, but just guessing that it's
>> probably like most others.  If this is the case, somewhere there is a
>> setting to tell it what your download and upload speed is.
>>
>> 500kpbs up doesn't seem like enough bandwidth to support 10Mpbs down,
>> either.
>>
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