[App_rpt-users] dadhi_test results.

[David McGough]

Yes, probably so. Notice that your results show some "clusters" of 99.6% 
results.

However, all I can say is try it and see if you're satisfied with the
results. A common symptom of timer jitter ends up be audio stutters that
get attributed to packet loss.

Another question to ponder is that your dahdi_test only ran a few seconds.
The VPS world is very dynamic, so your results may vary drastically,
depending on how heavily loaded the provider's systems are at any given
moment. The real-world impact is that one moment all is great, the next
moment the whole hub is almost unusable.

Anyhow, just beware of the constraints related to AllStar running on a
VPS. AllStar, as with most VoIP software, can't tolerate poor timer
quality very well. 


73, David KB4FXC


On Fri, 22 Jun 2018, Pierre Martel wrote:

> 
> So you are telling me that since I had a few small result below 99.95% there will be problem?
> 
> 
> De : David McGough
> Envoyé le :22 juin 2018 13:28
> À : Users of Asterisk app_rpt
> Objet :Re: [App_rpt-users] dadhi_test results.
> 
> 
> If your dahdi_test results ever fall below about 99.95, you're going to
> get some "call quality" issues. Stuttering, pops, clicks, bad timer
> results, audio delays, etc. This is most significant on heavily loaded
> hubs and when you're transcoding between different CODECs. How frequently
> you see problems depends on how bad the timing jitter is.
> 
> Google: "bad dahdi_test"  ....This has been discussed forever about
> Asterisk PBXs. You must remember that the way AllStar uses Asterisk,
> it's effectively an Asterisk conference call using the conf/bridge
> software in dahdi.
> 
> These numbers MUST be spot-on if you want GREAT results. There is no way 
> around this constraint in the current software.
> 
> 
> 73, David KB4FXC
> 
> 
> 
> 
> 
> On Fri, 22 Jun 2018, Mike wrote:
> 
> > Looks good Pierre,
> > 
> > What is your hardware arrangement cpu&speed/mem
> > 
> > ...mike/kb8jnm
> > 
> > 
> > On 6/22/2018 6:52 AM, Pierre Martel wrote:
> > > did a test on a vps I have on linode. was wondering if this sounds 
> > > good for you
> > >
> > > :[/usr/sbin]: sudo ./dahdi_test
> > > Opened pseudo dahdi interface, measuring accuracy...
> > > 99.997% 99.993% 99.997% 99.997% 99.984% 99.998% 99.991% 99.607%
> > > 99.993% 99.603% 99.608% 99.990% 99.613% 99.995% 99.998% 99.613%
> > > 99.992% 99.997% 99.988% 99.995% 99.999% 99.991% 99.985% 99.603%
> > > 99.996% 99.995% 99.998% 99.999% 99.995% 99.995% 99.612% 99.999%
> > > 99.893% 99.643% 99.525% 99.998% 99.994% 99.594% 99.999% 99.991%
> > > 99.998% 99.999% 99.615% 99.995% 99.996% 99.998% 99.996% 99.994%
> > > 99.995% 99.997% 99.980% 99.993% 99.999% 99.984% 99.999% 99.993%
> > > 99.998% 99.992% 99.985% 99.997% 99.999% 99.603% 100.000% 99.996%
> > > 99.996% 99.611% 99.998% 99.994% 99.994% 99.995% 99.996% 99.994%
> > > 99.605% 99.998% 99.999% 99.994% 99.997% 99.991% 99.997% 99.992%
> > > 99.996% 99.995% 99.999% 99.997% 99.980% 99.996% 99.999% 99.994%
> > > 99.996% 99.995% 99.996% 99.604% 99.998% 99.993% ^C
> > > --- Results after 94 passes ---
> > > Best: 100.000% -- Worst: 99.525% -- Average: 99.931304%
> > > Cumulative Accuracy (not per pass): 100.000
> > >
> > > this was while connected to another  2 node and some activity on the 
> > > repeaters.
> > >
> > > IS this a keeper? I am also planning to use that vps as an xlxD server 
> > > and running an ambed server at home (got 3 trancoding channel 
> > > possibility here.)
> > >
> > > If it is possible to link from allstar dstar and dmr that would make a 
> > > nice bridge between all those mode.. I just need a second pair of 
> > > dongle to also get fusion.
> > >
> > > If anyone have experience in such thing let me know. I will need some 
> > > hint. Dont need to be taken by the hand...
> > >
> > >
> > >
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