[Freeswitch-users] Choppy VM when using loopback (on Debian lenny)

Dmitry Sytchev kbdfck at gmail.com
Thu Feb 3 22:06:16 MSK 2011 

Yes, I also had this idea, but I thought it would lead to troubles
with loop detection.
How this can be done exactly? I need separate profiles for this? Or I
just can dial from internal to internal?

And what if I use Kamailio in front of FS? Then need to deal with call
re-routing to kamailio. I thought it may lead to spiral detection, if
I understand right what spiral is.

2011/2/3 Anthony Minessale <anthony.minessale at gmail.com>:
> maybe, but using loopback without the bowout is very costly.
> you can also consider hair-pinning a call back to your own box over
> SIP for this type of thing.
>
>
> On Thu, Feb 3, 2011 at 12:28 PM, Dmitry Sytchev <kbdfck at gmail.com> wrote:
>> Thanks, I will test tomorrow.
>>
>> I'm wondering if I could use att_xfer with loopbacks after these patches:D
>>
>> 2011/2/3 Anthony Minessale <anthony.minessale at gmail.com>:
>>> commit fb66abfab4a74055c38cdc67da83e6e0175a4a0b
>>> Author: Anthony Minessale <anthm at freeswitch.org>
>>> Date:   Tue Feb 1 16:22:36 2011 -0600
>>>
>>> this is the one you need at a bare minimum.
>>>
>>> If you are still having problems the most likely cause is ptime
>>> mismatch between the 2 ends of the call.
>>> you cannot leave loopback in the call path when the legs are not on
>>> the same ptime with very good results.
>>>
>>>
>>> On Thu, Feb 3, 2011 at 4:31 AM, Dmitry Sytchev <kbdfck at gmail.com> wrote:
>>>> We faced same trouble with FreeSWITCH Version 1.0.head (git-33848eb
>>>> 2011-02-01 08-56-26 +0100), the problem persists with loopback
>>>> channels. Even if two sip endpoints are bridged via loopback, sound is
>>>> choppy.
>>>>
>>>> We have bridge_early_media=true on loopback channel bridge command and
>>>> loopback_bowout=false, loopback_bowout_on_execute=false
>>>>
>>>> 2011/2/2 Dan Lane <null at invalid.name>:
>>>>> This seems to have resolved the issue for us :)
>>>>>
>>>>> Thanks.
>>>>>
>>>>> On Tue, Feb 1, 2011 at 8:47 PM, Anthony Minessale
>>>>> <anthony.minessale at gmail.com> wrote:
>>>>>> Try the latest GIT, I reverted the last patch and tried to solve the
>>>>>> problem differently.
>>>>>>
>>>>>>
>>>>>> On Tue, Feb 1, 2011 at 2:11 PM, Dan Lane <null at invalid.name> wrote:
>>>>>>> Yes, using 1f1541b our calls that use mod_loopback into mod_conference
>>>>>>> are unusable. The audio is choppy and delay increases as time passes.
>>>>>>>
>>>>>>> I thought it was an issue relating to the default 100Hz kernel on EC2
>>>>>>> so I spent some time yesterday putting together a 1000Hz kernel but it
>>>>>>> didn't make any difference. In the meantime I've compiled mod_loopback
>>>>>>> from 4c5426f and loaded it with my 1f1541b build which eliminates the
>>>>>>> issue.
>>>>>>>
>>>>>>> I haven't added it to Jira yet as I want to spend some time debugging
>>>>>>> it (and I also owe you some debug info for FS-2934) but the problem is
>>>>>>> definitely there.
>>>>>>>
>>>>>>> On Tue, Feb 1, 2011 at 3:58 PM, Anthony Minessale
>>>>>>> <anthony.minessale at gmail.com> wrote:
>>>>>>>> Are you saying you have better results on that version than you do on
>>>>>>>> the latest?
>>>>>>>> What conditions do you have that cause you trouble, what is the
>>>>>>>> endpoint on the other side.
>>>>>>>>
>>>>>>>> If the last commit to mod_loopback intended to improve audio quality
>>>>>>>> actually makes it worse I need to investigate it.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Tue, Feb 1, 2011 at 5:53 AM, Dan Lane <null at invalid.name> wrote:
>>>>>>>>> FWIW we've been also been having audio issues with loopback recently
>>>>>>>>> on EC2 (with a 1000Hz kernel).
>>>>>>>>>
>>>>>>>>> We worked around it in the short term by reverting mod_loopback to
>>>>>>>>> git-4c5426f during the build process.
>>>>>>>>>
>>>>>>>>> For anyone else who wants to try this just run "git checkout 4c5426f"
>>>>>>>>> in src/mod/endpoints/mod_loopback then build as usual. This is NOT a
>>>>>>>>> long term solution though.
>>>>>>>>>
>>>>>>>>> On Mon, Jan 31, 2011 at 8:02 AM, Øyvind Albrigtsen <oa at estation.dk> wrote:
>>>>>>>>>> Thanks for all your feedback. I'll keep on trying and inform you what
>>>>>>>>>> worked for me.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Regards
>>>>>>>>>> Oyvind
>>>>>>>>>>
>>>>>>>>>> On 2011-01-29 21:48, Anthony Minessale wrote:
>>>>>>>>>>> Everyone should try latest GIT before pondering any further because I
>>>>>>>>>>> added a patch like 2 days ago to adress this issue.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Sat, Jan 29, 2011 at 2:12 PM, Frank Park<frank at telonium.com>  wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Yeah. I, too, don't see the correlation between the NTP and hw timer..
>>>>>>>>>>>> I am not familiar with the timer_test command and what it's measuring, but
>>>>>>>>>>>> of the 50 tests it ran, min is 19089 and max is 20713.
>>>>>>>>>>>> Frank
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> On Fri, Jan 28, 2011 at 2:33 PM, David Ponzone<david.ponzone at ipeva.fr>
>>>>>>>>>>>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Frank,
>>>>>>>>>>>>> I fail to see the relationship between the hw timer and NTP.
>>>>>>>>>>>>> Can you please elaborate ?
>>>>>>>>>>>>> David Ponzone  Direction Technique
>>>>>>>>>>>>> email: david.ponzone at ipeva.fr
>>>>>>>>>>>>> tel:      01 74 03 18 97
>>>>>>>>>>>>> gsm:   06 66 98 76 34
>>>>>>>>>>>>> Service Client IPeva
>>>>>>>>>>>>> tel:      0811 46 26 26
>>>>>>>>>>>>> www.ipeva.fr  -   www.ipeva-studio.com
>>>>>>>>>>>>> Ce message et toutes les pièces jointes sont confidentiels et établis à
>>>>>>>>>>>>> l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
>>>>>>>>>>>>> non autorisée est interdite. Tout message électronique est susceptible
>>>>>>>>>>>>> d'altération. IPeva décline toute responsabilité au titre de ce message s'il
>>>>>>>>>>>>> a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce
>>>>>>>>>>>>> message, merci de le détruire immédiatement et d'avertir l'expéditeur.
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> Le 28/01/2011 à 19:49, Frank Carmickle a écrit :
>>>>>>>>>>>>>
>>>>>>>>>>>>> Hi
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Jan 28, 2011, at 7:39 AM, Øyvind Albrigtsen wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>
>>>>>>>>>>>>> I'm using latest git-version of Freeswitch, and when I go to voicemail
>>>>>>>>>>>>>
>>>>>>>>>>>>> when calling a number the sound playback is choppy and it skips some of
>>>>>>>>>>>>>
>>>>>>>>>>>>> the digits in the number I called.
>>>>>>>>>>>>>
>>>>>>>>>>>>> What kind of results do you get from timer_test at the fs_cli?  Are you
>>>>>>>>>>>>> running on hardware or are you virtualized?  What is your clock source set
>>>>>>>>>>>>> to and what are your available clock source options?  See
>>>>>>>>>>>>> /sys/devices/system/clocksource/clocksource0/available_clocksource and
>>>>>>>>>>>>> /sys/devices/system/clocksource/clocksource0/current_clocksource.  I am
>>>>>>>>>>>>> running virtualized with the 2.6.26-2-xen-amd64 and I can get timer_test to
>>>>>>>>>>>>> hang at 19998/19999 which works very well for me.  When I was having problem
>>>>>>>>>>>>> it was reporting numbers all over the map from 17400 to 22600 with lots of
>>>>>>>>>>>>> randomness in between.  I have my clocksource set to jiffies and xen
>>>>>>>>>>>>> independent wallclock set to 1.  Of course at that point you need to have
>>>>>>>>>>>>> ntp running against a bunch of servers to drive your clock nice and steady.
>>>>>>>>>>>>>   I know my set up is probably a lot different than yours but I thought I'd
>>>>>>>>>>>>> toss it out there to show that some of the harshest conditions can be dealt
>>>>>>>>>>>>> with and don't give up trying.  If you are running on hardware with a cpu
>>>>>>>>>>>>> that doesn't have constant_tsc then you might have some problems.  Just play
>>>>>>>>>>>>> with the different timer options until you find the one that works.
>>>>>>>>>>>>>
>>>>>>>>>>>>> HTH
>>>>>>>>>>>>> --FC
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>>
>>>>>>>>>>>> ----=======================----
>>>>>>>>>>>> Frank Park
>>>>>>>>>>>> Telonium Communications, LLC
>>>>>>>>>>>> frank at telonium.com
>>>>>>>>>>>> http://www.telonium.com
>>>>>>>>>>>> Follow Us on Twitter: @GetTelonium
>>>>>>>>>>>> 404-566-8888 x1001 Office
>>>>>>>>>>>> 404-939-4242 Cell
>>>>>>>>>>>> ----=======================----
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Anthony Minessale II
>>>>>>>>
>>>>>>>> FreeSWITCH http://www.freeswitch.org/
>>>>>>>> ClueCon http://www.cluecon.com/
>>>>>>>> Twitter: http://twitter.com/FreeSWITCH_wire
>>>>>>>>
>>>>>>>> AIM: anthm
>>>>>>>> MSN:anthony_minessale at hotmail.com
>>>>>>>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>>>>>>>> IRC: irc.freenode.net #freeswitch
>>>>>>>>
>>>>>>>> FreeSWITCH Developer Conference
>>>>>>>> sip:888 at conference.freeswitch.org
>>>>>>>> googletalk:conf+888 at conference.freeswitch.org
>>>>>>>> pstn:+19193869900
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>>> http://www.freeswitch.org
>>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> FreeSWITCH-users mailing list
>>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>>> http://www.freeswitch.org
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Anthony Minessale II
>>>>>>
>>>>>> FreeSWITCH http://www.freeswitch.org/
>>>>>> ClueCon http://www.cluecon.com/
>>>>>> Twitter: http://twitter.com/FreeSWITCH_wire
>>>>>>
>>>>>> AIM: anthm
>>>>>> MSN:anthony_minessale at hotmail.com
>>>>>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>>>>>> IRC: irc.freenode.net #freeswitch
>>>>>>
>>>>>> FreeSWITCH Developer Conference
>>>>>> sip:888 at conference.freeswitch.org
>>>>>> googletalk:conf+888 at conference.freeswitch.org
>>>>>> pstn:+19193869900
>>>>>>
>>>>>> _______________________________________________
>>>>>> FreeSWITCH-users mailing list
>>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>>> http://www.freeswitch.org
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> FreeSWITCH-users mailing list
>>>>> FreeSWITCH-users at lists.freeswitch.org
>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>>>>> http://www.freeswitch.org
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Best regards,
>>>>
>>>> Dmitry Sytchev,
>>>> IT Engineer
>>>>
>>>> _______________________________________________
>>>> FreeSWITCH-users mailing list
>>>> FreeSWITCH-users at lists.freeswitch.org
>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>>>> http://www.freeswitch.org
>>>>
>>>
>>>
>>>
>>> --
>>> Anthony Minessale II
>>>
>>> FreeSWITCH http://www.freeswitch.org/
>>> ClueCon http://www.cluecon.com/
>>> Twitter: http://twitter.com/FreeSWITCH_wire
>>>
>>> AIM: anthm
>>> MSN:anthony_minessale at hotmail.com
>>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>>> IRC: irc.freenode.net #freeswitch
>>>
>>> FreeSWITCH Developer Conference
>>> sip:888 at conference.freeswitch.org
>>> googletalk:conf+888 at conference.freeswitch.org
>>> pstn:+19193869900
>>>
>>> _______________________________________________
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>>> http://www.freeswitch.org
>>>
>>
>>
>>
>> --
>> Best regards,
>>
>> Dmitry Sytchev,
>> IT Engineer
>>
>> _______________________________________________
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>> http://www.freeswitch.org
>>
>
>
>
> --
> Anthony Minessale II
>
> FreeSWITCH http://www.freeswitch.org/
> ClueCon http://www.cluecon.com/
> Twitter: http://twitter.com/FreeSWITCH_wire
>
> AIM: anthm
> MSN:anthony_minessale at hotmail.com
> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
> IRC: irc.freenode.net #freeswitch
>
> FreeSWITCH Developer Conference
> sip:888 at conference.freeswitch.org
> googletalk:conf+888 at conference.freeswitch.org
> pstn:+19193869900
>
> _______________________________________________
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>



-- 
Best regards,

Dmitry Sytchev,
IT Engineer

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