Do you happen to do faxing on EC2? Also what distro do you run on your instances? On Tue, Apr 7, 2015 at 2:22 PM, Victor Medina <victor.medina@cibersys.com> wrote:
Price aside... we have no issues so far with Amazon. Carlos.
2015-04-05 19:22 GMT-04:30 Carlos Ruiz Díaz <carlos.ruizdiaz@gmail.com>:
This makes me wonder whether to stick with DO or migrate to Amazon.
Any advice on EC2 quality compared to DO?
On Sun, Apr 5, 2015 at 5:33 PM, Stanislav Sinyagin <ssinyagin@gmail.com> wrote:
I made additional tests by sending calls to sipgate.co.uk, and they confirm my results: when sending a call from my Xen server in Switzerland, the received audio is always perfect. But when sending from a Digitalocean host in Amsterdam, I get the slipping frames.
I will re-test again during a business day, when the servers are likely to be more busy.
On Sun, Apr 5, 2015 at 12:47 PM, Stanislav Sinyagin <ssinyagin@gmail.com
wrote:
Yrs, jitter buffer was enabled. Here I'm pretty sure that we deal with the clock skew. On Apr 5, 2015 12:07 PM, "Brian West" <brian@freeswitch.org> wrote:
Correct me if I'm wrong but is sounds like you've described jitter. Did you test with the jitter buffer enabled?
On Sunday, April 5, 2015, Regis M <regis.freeswitch.org@tornad.net> wrote:
nice work !!! Thanks for sharing.
2015-04-05 2:37 GMT+02:00 Stanislav Sinyagin <ssinyagin@gmail.com>:
> here we go: > > https://txlab.wordpress.com/2015/04/05/testing-rtp-clock-precision-on-a-virt... > > > > On Sat, Apr 4, 2015 at 4:26 PM, Stanislav Sinyagin < > ssinyagin@gmail.com> wrote: > > On Sat, Apr 4, 2015 at 1:03 PM, Regis M < > regis.freeswitch.org@tornad.net> wrote: > >> How do you check wavs together in audacity ? > > > > you just open two WAV files, align their starting position, and > > visually check the waves. If there's a problem, you would see that > > after few seconds, the waves are not aligned any more. > > > >> Can you send me 2 samples wav (send... and recorded) so I could > see the 20ms > >> diff that you exposed... > >> > >> Is there a way to automate the result checking, so it could help > to monitor > >> itsp quality > > > > Here > > https://github.com/openpreserve/scape-xcorrsound/issues/17 > > this is a link to a tool which compares two sound files at the wave > > level. You can also see the sound samples in the ticket. > > The problem is, that currently this tool does not detect such > slipping frames. > > > > I will also write a detailed article with examples, during the > weekend. > > > > > > > > > > > >> > >> > >> 2015-04-04 12:53 GMT+02:00 Stanislav Sinyagin < > ssinyagin@gmail.com>: > >>> > >>> Important is to send the media through two independent carriers > - then you > >>> can be sure that your clock is compared against a high quality > one. > >>> > >>> On Apr 4, 2015 12:46 PM, "Regis M" < > regis.freeswitch.org@tornad.net> > >>> wrote: > >>>> > >>>> Hi, > >>>> > >>>> It's a very interresting test and conclusion. > >>>> > >>>> I will try to build a similar environnement on my freeswitch to > check > >>>> some system :) > >>>> > >>>> thanks > >>>> > >>>> > >>>> > >>>> 2015-04-04 2:16 GMT+02:00 Stanislav Sinyagin < > ssinyagin@gmail.com>: > >>>>> > >>>>> hi, > >>>>> > >>>>> Here are some test results which might be interesting: > >>>>> > >>>>> I've set up a test FreeSWITCH server at digitalocean (they use > KVM), > >>>>> and originated test calls to some ITSP accounts. Each call > played a > >>>>> test sound file (voice samples from ITU: > >>>>> > http://www.itu.int/net/itu-t/sigdb/genaudio/AudioForm-g.aspx?val=1000050 > >>>>> ), and on the receiving end another FreeSWITCH server was > recording > >>>>> the received session. The receiving server was on a XEN VM. > Both > >>>>> servers talked G711 to their corresponding ITSP accounts. > >>>>> > >>>>> Then I compared the source audio and received audio in > Audacity editor. > >>>>> > >>>>> The tests showed that the received voice wave shifts 20ms from > the > >>>>> original sound every few seconds, randomly back and forward. > This > >>>>> skewing was always present, regardless of ITSP and time of day. > >>>>> > >>>>> Then I moved the sending server to a XEN VM, and the waves > appeared > >>>>> almost perfectly synchronized (there was a 5ms skew in one > test, and I > >>>>> guess it's related to transcoding buffer, as the sound was > obviously > >>>>> transcoded). > >>>>> > >>>>> The effect was always visible with a 30-second sample, and I > also made > >>>>> additional tests with 2-minute samples. > >>>>> > >>>>> It would also be interesting to test this from a VmWare VM. If > someone > >>>>> wants to run such a test, feel free to contact me directly. > >>>>> > >>>>> > >>>>> cheers, > >>>>> stan > >>>>> > >>>>> > >>>>> > _________________________________________________________________________ > >>>>> Professional FreeSWITCH Consulting Services: > >>>>> consulting@freeswitch.org > >>>>> http://www.freeswitchsolutions.com > >>>>> > >>>>> Official FreeSWITCH Sites > >>>>> http://www.freeswitch.org > >>>>> http://confluence.freeswitch.org > >>>>> http://www.cluecon.com > >>>>> > >>>>> FreeSWITCH-users mailing list > >>>>> FreeSWITCH-users@lists.freeswitch.org > >>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > >>>>> UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > >>>>> http://www.freeswitch.org > >>>> > >>>> > >>>> > >>>> > _________________________________________________________________________ > >>>> Professional FreeSWITCH Consulting Services: > >>>> consulting@freeswitch.org > >>>> http://www.freeswitchsolutions.com > >>>> > >>>> Official FreeSWITCH Sites > >>>> http://www.freeswitch.org > >>>> http://confluence.freeswitch.org > >>>> http://www.cluecon.com > >>>> > >>>> FreeSWITCH-users mailing list > >>>> FreeSWITCH-users@lists.freeswitch.org > >>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > >>>> UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > >>>> http://www.freeswitch.org > >>> > >>> > >>> > _________________________________________________________________________ > >>> Professional FreeSWITCH Consulting Services: > >>> consulting@freeswitch.org > >>> http://www.freeswitchsolutions.com > >>> > >>> Official FreeSWITCH Sites > >>> http://www.freeswitch.org > >>> http://confluence.freeswitch.org > >>> http://www.cluecon.com > >>> > >>> FreeSWITCH-users mailing list > >>> FreeSWITCH-users@lists.freeswitch.org > >>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > >>> UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > >>> http://www.freeswitch.org > >> > >> > >> > >> > _________________________________________________________________________ > >> Professional FreeSWITCH Consulting Services: > >> consulting@freeswitch.org > >> http://www.freeswitchsolutions.com > >> > >> Official FreeSWITCH Sites > >> http://www.freeswitch.org > >> http://confluence.freeswitch.org > >> http://www.cluecon.com > >> > >> FreeSWITCH-users mailing list > >> FreeSWITCH-users@lists.freeswitch.org > >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > >> UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > >> http://www.freeswitch.org > > > _________________________________________________________________________ > Professional FreeSWITCH Consulting Services: > consulting@freeswitch.org > http://www.freeswitchsolutions.com > > Official FreeSWITCH Sites > http://www.freeswitch.org > http://confluence.freeswitch.org > http://www.cluecon.com > > FreeSWITCH-users mailing list > FreeSWITCH-users@lists.freeswitch.org > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users > UNSUBSCRIBE: > http://lists.freeswitch.org/mailman/options/freeswitch-users > http://www.freeswitch.org >
--
*Brian West* brian@freeswitch.org
*Twitter: @FreeSWITCH , @briankwest* http://www.freeswitchbook.com http://www.freeswitchcookbook.com
ClueCon 2015 Call for Speakers <https://www.cluecon.com/call-for-speakers/> | Register <https://freeswitch.com/cart.php?gid=1> TODAY! | Reddit: /r/freeswitch <https://www.reddit.com/r/freeswitch>
*T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378) *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
Official FreeSWITCH Sites http://www.freeswitch.org http://confluence.freeswitch.org http://www.cluecon.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE: http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
Official FreeSWITCH Sites http://www.freeswitch.org http://confluence.freeswitch.org http://www.cluecon.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- Carlos http://caruizdiaz.com
_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
Official FreeSWITCH Sites http://www.freeswitch.org http://confluence.freeswitch.org http://www.cluecon.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
--
Víctor E. Medina M. Platform Architect / Chief Infrastructure +58424 291 4561 BB #79A8AFA2 @VMCibersys
_________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com
Official FreeSWITCH Sites http://www.freeswitch.org http://confluence.freeswitch.org http://www.cluecon.com
FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
-- *Brian West* brian@freeswitch.org *Twitter: @FreeSWITCH , @briankwest* http://www.freeswitchbook.com http://www.freeswitchcookbook.com ClueCon 2015 Call for Speakers <https://www.cluecon.com/call-for-speakers/> | Register <https://freeswitch.com/cart.php?gid=1> TODAY! | Reddit: /r/freeswitch <https://www.reddit.com/r/freeswitch> *T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378) *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest