[App_rpt-users] Delay

[kk6ecm]

My experience suggests that newer chipsets can have issues with the audio portion of the URI/URIx when using ACID. I've found the DMK test software and loop back plug to be a useful check; remember to stop asterisk before using. Also, on newer faster machines that do not have the Ethernet drivers that work with ACID required me to start with a standard Centos 5 build, then complete the ACID load on top of that, using the ACID scrips used after the first reboot. They may not work with the URI/URIx, but they make great hubs.

As for the delay, it can very... I just don't listen to both sides of the repeater communications at the same time. I've experienced delays that run anywhere from 1/4 to 1 secs, depending the total loop configuration.

Thanks,
Bob
kk6ecm

Sent from iPad


> On May 15, 2015, at 9:38 AM, Keith Goobie <keith at goobie.org> wrote:
> 
> Core i5 is good horsepower – assuming you running at least 4GB RAM.
> 
> Assuming you are running ulaw codecs, normally bandwidth required is 87 kbps.
> 
> You state that you have two users sitting side by side, both connected to the same asterisk server.  You will be dealing with latencies to get the voip audio to the server, server processing and then voip audio to get to the second user.  
> 
> Going to a faster codec will certainly help, but the codec must be supported by the app_rpt you are running.
> 
> I am unware of a response to your last question.
> 
> Keith
> 
> 
> 
> 
> On 5/15/15 12:16 PM, "John Locke" <jldharma at gmail.com> wrote:
> 
> I don´t have the exact specifications, but Is a standard Pc about 5-6 yeards old.
> My idea was to try with a corei5...
> 
> Another question. Is it posible for the second operator connected to the same chanel to listen to the radios (ambulances) but not the audio of the operator next to him?
> 
> Thanks
> 
> 
> 
> On Fri, May 15, 2015 at 1:09 PM, Keith Goobie <keith at goobie.org> wrote:
> Welcome to the wonderful world of VoIP and associated delays.
> 
> I am doubtful a faster PC will remedy the issue.  But what is your definition of a standard PC versus something faster.
> 
> Keith
> 
> 
> 
> On 5/15/15 11:46 AM, "John Locke" <jldharma at gmail.com <http://jldharma@gmail.com> > wrote:
> 
> Hi all,
> I'm trying to develop a ambulance radio dispatch application.
> The basic features of app_rpt and iaxrpt are working OK.
> The radios are conned with URI interfaces.
> 
> The problem is that there is a delay of about 1-2 seconds between the call of the operator and the audio received in the radios.
> 
> Also, there are 2 operators (in the same room) connected with iaxrpt to the same channel and the other operator can hear the delay too. Is like an annoying echo.
> 
> The network is ok and we are using a "standard" PC for the task.
> 
> Do you think that a faster PC would solve the problem?
> 
> Any help would be very appreciated.
> 
> Thanks in advance
> John
> 
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> -- 
> keith at goobie.org
> Keith Goobie
> Richmond Hill, ON, CANADA
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