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[Freeswitch-users] "Shadow calls" - duplicate calls executing in parallel


 
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svanherwaarden at prec...
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PostPosted: Fri Feb 26, 2021 8:08 am    Post subject: [Freeswitch-users] "Shadow calls" - duplicate call Reply with quote

Hi all,


I was just wondering if others have experienced this: on a few of the FreeSWITCH systems I've interacted with, I've observed situations where incoming phone calls seem to be duplicated. So there seem to be two call processes for the same phone number, also both receiving things like DTMF events. The timestamps of events tend to be very close (sub-second) but not necessarily identical.


It's not very common, less than 1 per 1000 calls has this happening. It does tend to throw off some of our tooling (both in call handling and analysis). Curious to know if there could be an obvious cause/easy fix.


Kind regards,
Sam
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davidswalkabout at gma...
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PostPosted: Fri Feb 26, 2021 10:17 pm    Post subject: [Freeswitch-users] "Shadow calls" - duplicate call Reply with quote

I think the last time we experienced that was with 10.4 (we're on 10.5 now).

It happened infrequently as you note. I assumed it was an error in the way our WebRTC app invoked verto. (I didn't have any browser console log to confirm that, though.)

On Sat, 27 Feb 2021, 9:07 am , <freeswitch-users-request@lists.freeswitch.org (freeswitch-users-request@lists.freeswitch.org)> wrote:

Quote:


---------- Forwarded message ----------
From: Sam van Herwaarden <svanherwaarden@precisionag.org (svanherwaarden@precisionag.org)>

Hi all,


I was just wondering if others have experienced this: on a few of the FreeSWITCH systems I've interacted with, I've observed situations where incoming phone calls seem to be duplicated. So there seem to be two call processes for the same phone number, also both receiving things like DTMF events. The timestamps of events tend to be very close (sub-second) but not necessarily identical.


It's not very common, less than 1 per 1000 calls has this happening. It does tend to throw off some of our tooling (both in call handling and analysis). Curious to know if there could be an obvious cause/easy fix.


Kind regards,
Sam

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svanherwaarden at prec...
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PostPosted: Mon Mar 01, 2021 7:08 am    Post subject: [Freeswitch-users] "Shadow calls" - duplicate call Reply with quote

I see. I've seen this happening both on systems using SIP and systems using PRI (no RTC involved), so it might be something else. Unfortunately I'm not in a position to upgrade some of the systems (we don't run all of them) so I guess I'll just have to live with this.


Best,
Sam



On Sat, Feb 27, 2021 at 3:36 AM David P <davidswalkabout@gmail.com (davidswalkabout@gmail.com)> wrote:

Quote:
I think the last time we experienced that was with 10.4 (we're on 10.5 now).

It happened infrequently as you note. I assumed it was an error in the way our WebRTC app invoked verto. (I didn't have any browser console log to confirm that, though.)

On Sat, 27 Feb 2021, 9:07 am , <freeswitch-users-request@lists.freeswitch.org (freeswitch-users-request@lists.freeswitch.org)> wrote:

Quote:


---------- Forwarded message ----------
From: Sam van Herwaarden <svanherwaarden@precisionag.org (svanherwaarden@precisionag.org)>

Hi all,


I was just wondering if others have experienced this: on a few of the FreeSWITCH systems I've interacted with, I've observed situations where incoming phone calls seem to be duplicated. So there seem to be two call processes for the same phone number, also both receiving things like DTMF events. The timestamps of events tend to be very close (sub-second) but not necessarily identical.


It's not very common, less than 1 per 1000 calls has this happening. It does tend to throw off some of our tooling (both in call handling and analysis). Curious to know if there could be an obvious cause/easy fix.


Kind regards,
Sam




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