[asterisk-users] TCP port, VPN and resolving the cutting voice problem

[Steve Totaro]

On Tue, Nov 30, 2010 at 1:00 PM, Steve Totaro
<stotaro at totarotechnologies.com> wrote:
> On Tue, Nov 30, 2010 at 4:28 AM, bilal ghayyad <bilmar_gh at yahoo.com> wrote:
>> Hi All;
>>
>> Can I run the IAX on TCP port instead of UDP port?
>>
>> If I ran IAX in TCP port, and in case my network was having a lot of users doing browse on the internet and downloading, so in that case and if the IAX used TCP port, so the voice will be better than using UDP (because in TCP the lost packets will be resend while in TCP it will not which will cause the voice to be cutting)?
>>
>> Same thing if we used the VPN, and in case of other users are using the Internet to do browsing and downloading then the voice quality will be better than without VPN as the VPN is using TCP?
>>
>> The internet bandwidth is not that small .. but the users are doing a big amount of work and we would like to overcome the packets losses in case of using the UDP as the packets are not resend.
>>
>> Any advise for this?
>>
>> What could be a solution that I can apply it to resolve the voice cutting if the Asterisk was using the internet that is shared with the users in the office that are doing download and browsing?
>>
>> One more thing, what about using the Buffering or any other technique that can help to overcome packet losses due to the internet download and browsing?
>>
>> Appreciate any help or advise?
>>
>> Regards
>> Bilal
>>
>
> 1.  Drop IAX and use SIP
> 2.  Use some QoS or traffic management.  There are plenty of
> opensource products, I go with Vyatta every time.
> 3. Get a dedicated VoIP pipe that will not be in contention with
> YouTube or whatever.
>
> Thanks,
> Steve T
>

I would suggest #3 because it is bullet proof unless your calls are
maxing the bandwidth.  You can always sell it to the decision makers
as a business continuity contingency plan.  The suits like those
buzzwords and if the pipe is big enough, then you could allow mission
critical business data to use that circuit.

It is an easy sale to the bossmen, especially with the way you can
talk down ISPs nowdays.

Haggle with them, they are dying for the business.  I got almost every
circuit for half off the original quote.  Just wait till the end of
the month and say, "I can have this singed and faxed over today if you
can provide (name your terms, MRC, NRC, contract duration)

It is a different world now.  Americans are generally not very good
hagglers.  My travels have taught me many tricks and you can haggle
virtually anything, within reason of course.

Get quotes from all the carriers, haggle with them all, and then use
them against each other, it can be time consuming, but I have paid for
my salary in savings a few times over.

Thanks,
Steve T