[asterisk-users] Audiocodes MP-114 noise

Fri Nov 3 09:54:38 MST 2006

Jason,

Funny enough, I'm working on this exact same problem right now with  
one of our customers and we're scheduling a conference call with  
Audiocodes today. I'll get back to you on what I found out. However,  
in the mean time, you may want to take it up with the place you  
bought the unit from, they can go through these same troubleshooting  
procedures (maybe something I forgot to cover), and will eventually  
take it up with AC themselves. A DSP recording may help determine  
where the problem lies within the device or possibly network;  
however, this needs to be done only in extreme measures. Contact your  
support agent (reseller or service provider), get them logs, config  
ini's, network diagrams, IP PBX information and configuration,  
whatever you can so they are fully aware of your network and they  
should be able to assist troubleshooting this issue more effectively  
than I can here.

This part I can't really help you with on list, you're support agent  
would need to assist you from here on this matter; however, I'll let  
you know more information when I have it from Audiocodes when we get  
a resolution on our end for our customer. Maybe, hopefully, it will  
just be a quick tweak.

I'll keep you informed what I find out on my end.

Jessee Holmes
Atacomm / Ataractic Corporation
www.atacomm.com
V: 1-877-700-VOIP
jholmes at atacomm.com

Looking for voice over IP products?  Visit our VoIP store at http:// 
voipstore.atacomm.com/

On Nov 3, 2006, at 12:14 AM, Jason Kim wrote:

> Jessee,
> I tried many combinations of "Voice Volume", "Input
> Gain" and packetization time , but it's noisy steel.
> I'm using G.711A-law and packetization time is 20ms.
> It can be impedance mismatch problem but i cannot
> adjust impedance of FXO port of MP-114.
>
>
> --- Jessee J Holmes <jholmes at atacomm.com> wrote:
>
>> Jason,
>>
>> There are a couple things we can try to fix your
>> problem.
>>
>> Your firmware shouldn't be an issue, but latest I've
>> got now is:
>> MP118_SIP_F4.80A.034.004.cmp
>>
>> Let's try some quick things first though:
>>
>> In your web interface, go to advanced config -
>> channel settings /
>> voice settings
>>
>> There are some options here you can play with:
>>
>> "Voice Volume" (IP side of this thing) - by default
>> this should be
>> set at '1'. Try bringing this down slowly, I'd say
>> in increments of 5
>> (-4, then -9, and so on).
>>
>> Range on this option can be anywhere from -32 to
>> +32, you really
>> shouldn't need to go beyond -15; but you're actual
>> volume on the
>> calls should still stay reasonable.
>>
>> "Input Gain" (telco side) is another option you can
>> slowly change as
>> well (set to 0 by default).
>>
>> There should also be spot where you can specify the
>> "codername", you
>> could possibly try changing this to another codec
>> such as G.729 or G.
>> 711u-law (should be the same codec being used on
>> your Asterisk
>> system) try changing packet size from 20 to 40 or
>> 60. This may also
>> help.
>>
>> If none of this stuff helps, let me know. We can
>> then start getting
>> really technical.
>>
>> Jessee Holmes
>> Atacomm / Ataractic Corporation
>> www.atacomm.com
>> V: 1-877-700-VOIP
>> jholmes at atacomm.com
>>
>> Looking for voice over IP products?  Visit our VoIP
>> store at http://
>> voipstore.atacomm.com/
>>
>>
>> On Nov 1, 2006, at 1:45 AM, Jason Kim wrote:
>>
>>> Thank you Jessee,
>>>
>>> Firmware seems to be recent(4.80A.025.004).
>>> For 'noisy', I mean IP Phone <--> * <--> MP-114
>> side.
>>> Audio quality of MP-114 <--> PSTN <--> Analog
>> phone is
>>> good.
>>> I think it can be power ground or gain problem.
>>> Any experience?
>>>
>>> Thanks,
>>> Jason
>>>
>>> --- Jessee J Holmes <jholmes at atacomm.com> wrote:
>>>
>>>> Dear Jason,
>>>>
>>>> Please define better noisy? You talking echo
>> issues?
>>>> Is it on just
>>>> your side or on the called party's side as well?
>>>> This start happening immediately, or was the box
>>>> working before and
>>>> the problem just started?
>>>>
>>>> Also, a quick heads up, make sure before even
>>>> beginning to
>>>> troubleshoot an issue like this you do a factory
>>>> reset to the unit
>>>> and get the latest available firmware on it.
>> Usually
>>>> that fixes
>>>> annoying issues like this.
>>>>
>>>> Thanks,
>>>>
>>>>
>>>> Jessee Holmes
>>>> Atacomm / Ataractic Corporation
>>>> www.atacomm.com
>>>> V: 1-877-700-VOIP
>>>> jholmes at atacomm.com
>>>>
>>>> Looking for voice over IP products?  Visit our
>> VoIP
>>>> store at http://
>>>> voipstore.atacomm.com/
>>>>
>>>>
>>>> On Oct 30, 2006, at 10:36 PM, Jason Kim wrote:
>>>>
>>>>> It's noisy while talking.
>>>>> Any idea?
>>>>>
>>>>> Thanks in advance.
>>>>> Jason
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
> ______________________________________________________________________
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