[asterisk-users] Interesting observation

[Darrick Hartman]

I have an interesting observation which I thought I'd pass along to save 
other people from spending time trying to 'fix' it.

One of my clients uses Charter's so called "business phone service". 
They provide 'analog' phone lines over IP.  In general, they've worked 
OK.  End users were saying that the phone are "cutting out" at times. 
What I've observed is they actually do "cut out" (meaning all inbound 
audio is momentarily lost) if a loud noise is created on the local end. 
  This client has a machine shop so you can imagine that at times it 
does get quite loud.

I spent a few hours trying to different setting in the Polycom phones, 
but finally thought I'd try plugging an analog headset into the Charter 
CPE device directly.  The same behavior was experienced.  It appears 
they have a 'feature' which cuts out the incoming audio if a loud noise 
(simulated by blowing into the receiver) is experienced outgoing.

Pretty much going to a true analog service is the only solution that I 
can think of.  Would be interested if anyone has other thoughts.

Darrick