[Asterisk-Users] Beeps and noises during calls

[Sean Garland]

The beeps are not DTMF tones (at least they don't sound like it).  It
sounds more like the system is trying to compensate for something or
adjusting something.  There is a beep, sometimes several, or maybe one
or 2 in a row, and it can be faint, or loud, or whatever, but is always
the same pitch and tone.  Sometimes it is accompanied with loud talkback
to the earpiece.   I'm going nuts, and cannot in good conscience,
install or recommend this to anyone till I can resolve this.  It has
happened with 2 separate installs of *, with different hardware,
different packages installed (one is * 1.2.4 with freepbx, the other was
* 1.0 with nothing), and different digium hardware.  The only thing that
was the same is the Polycom phones, and SBC as a provider for the POTS
lines...

HELP!!!!!


Thanks
Sean Garland

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Zoa
Sent: Friday, April 07, 2006 9:03 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Beeps and noises during calls


Some more info:

TALKOFF is the wrong recognition of DTMF component in human voice as
true DTMF signal. This is an unavoidable factor since human voice always
contain valid DTMF combination. Fortunately, presence of these valid
DTMF components are unsteady. Unlike real DTMF generated from a
touch-tone keyboard, these 'human' DTMF cannot maintain on a constant
combination. So they can be isolated by DELAY discrimination. If a
decoded DTMF signal can stay on constantly for certain duration which
exceed those normal period experienced in human voice, then it can be
identified as a real DTMF command.

taken from:

http://www.qsl.net/ve3rgw/dtmfsql.html


Zoa wrote:

>
> Have a look at this :
>
> http://www.dslreports.com/forum/remark,9151528
>
> If anybody would have such a mitel or bellcore dtmf talkoff wav file, 
> i have a very big email box you can drop it in :p
>
> Zoa
>
>
> Sean Garland wrote:
>
>> I have a very annoying problem that we hear on our end, but the other

>> party doesn't hear.  There are random beeps and echo type noises that

>> occur.  They are present during voicemails, and present on my end 
>> during calls.  Is anyone experiencing the same deal?  I have asked 
>> this a number of ways on the list, and never get a response...
>> Thank you.
>>
>>
>> Sean Garland
>> Mount Shasta, CA
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