[*] Garbled Outbound Audio

[Dan Keizer]

well, it's more of an RF Interference issue what I'm talking about -
-so it's dependent upon the susceptibility of the device itself,
whether it's analog/digital doesn't really matter ..

Dan.

On Tue, Sep 14, 2010 at 10:59 AM, Bergen, Mark <mbergen at obsglobal.com> wrote:
> 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
>>
>>
>>
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>>
>