Hi!
Jan Clairmont wrote:
I have received calls and the caller is injected with a sound similar to a
fax modem static. Now my outbound callers hear static. This is obviously a
problem either with Comcasts injecting noise packets or Verizon or a carrier
that carries the VOIP call. This is prevalent with others who subscribe to
your service.
From my experiences with audio recording/speech processing and internet
telephone applications, there can be a lot of reasons for static apart
from DoS attacks.
First I would check whether your computer and its audio equipment are
working properly:
- Do you use simple headsets for making calls? (cheap headsets = bad
audio quality)
- Are any mobile phones or other wireless devices near your computer
which could cause interferences?
- Do you have any other applications running in the background that
access your sound card?
(For example turning down internet radio / mp3 clients while
making a phone call?)
Concerning your ISP, some ISPs ban P2P applications and some VoIP
clients are P2P-based. So I would check whether there have been any
changes to the Terms of Service recently.
Here are some links I found while searching for "VoIP trouble shoot":
http://www.pingplotter.com/tutorial/VoipTroubleshooting.html
http://www.voip-info.org/wiki/view/How+To+Debug+and+Troubleshoot+VOIP
http://voipreview.org/Forum/thread/130.aspx
Have a nice day!
Yours sincerely,
Anja Hofmann
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