[Freeswitch-users] One Way Audio

Wed May 22 05:12:55 MSD 2013

Hey Michael,

The problem is back and seems to all the time now.

Pcapsipdump for a single call is here
http://www.bizfocused.com/sean/fs_problem/pcapsipdump.tar.gz 

I would like to know why calling FROM FS to a SPRINT phone results in audio
FROM SPRINT, but not to SPRINT.  Reversing the call works every time.

Also, any tips on getting started with wireshark to investigate myself next
time would be appreciated.

Thanks,

Sean

From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Michael
Collins
Sent: Friday, May 17, 2013 7:29 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] One Way Audio

It wouldn't be the first time that a computer decided to behave because it
knew Daddy was watching...

-MC

On Thu, May 16, 2013 at 7:20 PM, Sean Devoy <sdevoy at bizfocused.com> wrote:

Thanks MC.  Had to load the pcapdev-lib, but got pcapsipdump installed.

My wife had just called my cell and got one way audio.  So I ran:
pcapsipdump -f -p -i eth0 -d /tmp -n <my number>

Of course I got 2 way audio.  I called the one that ALWAYS fails .. Got 2
way audio!  Does pcapsipdump fix it?  lol

I will try in day time tomorrow and see if we can get a failure.

Nothing in the freeswitch.log of value?  I didn't see anything, but there is
still a lot for me to learn there.

Sean

From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Michael
Collins
Sent: Thursday, May 16, 2013 7:35 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] One Way Audio

Sean,

Glad to hear you're making progress with using tcpdump and other packet
capture-ish tools. You've successfully captured the SIP call leg between
your phone and your FreeSWITCH. That's good, but it's incomplete. You really
want SIP and RTP both, and you want the call leg between FreeSWITCH and the
telco. You have a few options:

Expand your tcpdump. In other words, cast a wider net. Pro: easy to do. Con:
creates massive pcap files through which you must sift to find the call in
question.

Use pcapsipdump. Pro: does all the work for you by putting SIP and RTP for
each call leg into a single file. Cons: You have to compile it yourself, and
it creates a whole lot of files, so you'll need to get used to it.

My personal opinion is this: if you never, ever have to debug a SIP call
ever again then just use tcpdump. However, if you're the phone guy and
you'll be doing this again in the future then bite the bullet and learn
pcapsipdump. Believe me it's worth it.

-MC

On Thu, May 16, 2013 at 3:31 PM, Sean Devoy <sdevoy at bizfocused.com> wrote:

Hi all,

First, I am on version: FreeSWITCH Version
1.2.5.3+git~20121219T035317Z~2b4aa48049 (git 2b4aa48 2012-12-19 03:53:17Z)
I hope to move to the Stable 1.2.9 this weekend.

I am having very reliable one way audio when calling Sprint Cell Phone
users, though not every time.  I got this reproducible on my phone, but by
the time I learned tcpdump command, it was working again.  However, the user
that reported it seems to get it almost everytime.

Helpful tidbits:

.         I THINK it happens in either direction.

.         For this person at his home, it appears to be every time (for now)

.         He reports calling (to or from) other Sprint Cell users results in
the same problem from our FS

.         It appears to only be true with Sprint Cell calls! (But my users
say that's not Sprints fault!)

Scenario:

I place a call from my Desk Cisco Phone (220) to his number 410493nnnn and
it rings, he answers, I can hear him crystal clear . he can't hear me at
all.  I had a theory that it worked after 30 seconds (on my cell), but that
does not hold true on his cell.

Here is the FS logfile:
http://www.bizfocused.com/Sean/fs_problem/freeswitch_no_audio_in.log.txt

And here is the tcpdump output:
http://www.bizfocused.com/Sean/fs_problem/dump.pcap.zip 

Based on the small size of the file, I suspect someone is going to say "do
it again with this tcpdump command".  I welcome the education.

Anyway, any insight will be appreciated.

Sean

_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
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http://www.freeswitchsolutions.com

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-- 
Michael S Collins
Twitter: @mercutioviz
http://www.FreeSWITCH.org
http://www.ClueCon.com
http://www.OSTAG.org

_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting at freeswitch.org
http://www.freeswitchsolutions.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

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

-- 
Michael S Collins
Twitter: @mercutioviz
http://www.FreeSWITCH.org
http://www.ClueCon.com
http://www.OSTAG.org

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