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

[EMAIL PROTECTED]


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 <[EMAIL PROTECTED]> 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

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 <[EMAIL PROTECTED]> 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

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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