[*] Garbled Outbound Audio

[Bergen, Mark]

Thank you Dan;
Interesting, but the audio has happened on calls to landlines as well. I'm glad you mentioned the cell phones though, at first I thought it was specific to them but just yesterday it happened again on a call to a landline.
Mark


-----Original Message-----
From: Dan Keizer [mailto:ve4drk at gmail.com] 
Sent: September-14-10 10:50 AM
To: Bergen, Mark
Cc: Chris Friesen; asterisk at muug.mb.ca
Subject: Re: [*] Garbled Outbound Audio

One of the more common issues we hear on our phones during conference calls is the persistent interference of cell phones (specifically
blackberries) .. it is not uncommon to have people asked to move their BB's away from the units  .. this has a warbling type of effect on an audio level.

Dan.

On Tue, Sep 14, 2010 at 10:11 AM, Bergen, Mark <mbergen at obsglobal.com> wrote:
> Thank you for the input Chris;
>
> We are using Sangoma A101DE T1 and Sangoma A20400 8 FXS analog card 
> with 35 Snom 320 handsets. I've heard the jitter earlier on when 
> talking to a user directly (extension to extension) but assumed it was 
> a network issue, I'm in Winnipeg and the user was in Calgary with the 
> phones connecting to each other through a VPN.
>
> We did have our trixbox on a different vlan than the handsets, putting 
> them both on the same vlan allowed us to bypass the router completely 
> and the problem has gotten much better but is still present. It is 
> generally about 6 to 10 seconds of 'garbled' outbound audio after 
> about 20min, just long enough to be annoying.  A user described it as 
> sounding like someone talking underwater.
>
> I'll contact Sangoma and see if maybe it is a driver or setting issue, 
> no users have complained yet about this issue happening between 
> extension, just with outside calls.
>
> Mark
>
>
>
> Mark Bergen
>
> Network Support Analyst
>
> ONLINE BUSINESS SYSTEMS
>
> Explore | Innovate | Lead
>
>
>
> 200-115 Bannatyne Ave., Winnipeg MB  R3B 0R3
>
> mbergen at obsglobal.com |  Direct Line: 204.982-0218
>
> Office: 204.982.0200  |  Fax: 204.982.0201
>
> www.obsglobal.com
>
>
>
> From: Chris Friesen [mailto:cfriesen at telenium.ca]
> Sent: September-14-10 9:55 AM
> To: Bergen, Mark; asterisk at muug.mb.ca
> Subject: RE: [*] Garbled Outbound Audio
>
>
>
> What card and server are you using to run Trixbox?
>
>
>
> We had a similar issue using Switchvox on an HP DL360 and a Digium 
> PCIe card. We were able to match the random static with error messages 
> in the /var/log, it turned out. What we were able to determine is that 
> there was an issue with the digium driver and asterisk regarding 
> timing that was causing this. We changed cards (which changed drivers) 
> and the random static stopped.
>
>
>
> chris
>
>
>
> From: asterisk-bounces at muug.mb.ca [mailto:asterisk-bounces at muug.mb.ca] 
> On Behalf Of Bergen, Mark
> Sent: September-13-10 8:27 PM
> To: asterisk at muug.mb.ca
> Subject: [*] Garbled Outbound Audio
>
>
>
> We have noticed on occasion the outbound audio on our phone system is 
> garbled. We have checked the network and it seems to be in good order. 
> It happens randomly and usually only for a few seconds (just long 
> enough to annoy users). It has also happened when there was only a 
> light load on the network.
>
> We configured one of the snom 320 handsets to only use the G711u codec 
> and no real change (outbound audio was still garbled a couple of times 
> briefly over a 1.5hr phone call). Our system uses VoIP only inside our 
> local network, we have an MTS PRI for outbound calls.
>
> Anyone have any ideas or pointers?
>
> Thanks;
>
> Mark
>
>
>
> Mark Bergen
>
> Network Support Analyst
>
> ONLINE BUSINESS SYSTEMS
>
> Explore | Innovate | Lead
>
>
>
> 200-115 Bannatyne Ave., Winnipeg MB  R3B 0R3
>
> mbergen at obsglobal.com |  Direct Line: 204.982-0218
>
> Office: 204.982.0200  |  Fax: 204.982.0201
>
> www.obsglobal.com
>
>
>
> _______________________________________________
> Asterisk mailing list
> Asterisk at muug.mb.ca
> http://www.muug.mb.ca/mailman/listinfo/asterisk
>
>