Full Disclosure mailing list archives
Re: Static Injection into Commercial Lines - DoS on Vonage - Current Status
From: Anja Hofmann <anja.hofmann () ub uni-tuebingen de>
Date: Wed, 26 Mar 2008 09:36:26 +0100
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 _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Re: Free Tibet.., (continued)
- Re: Free Tibet.. Tremaine Lea (Mar 25)
- Re: Free Tibet.. Dmitry (Mar 25)
- Re: Free Tibet.. Tremaine Lea (Mar 25)
- Re: Free Tibet.. Byron Sonne (Mar 25)
- Re: Free Tibet.. Anders B Jansson (Mar 25)
- Re: Free Tibet.. Gautam (Mar 25)
- Re: Free Tibet.. Peter Dawson (Mar 25)
- Static Injection into Commercial Lines - DoS on Vonage - Current Status Jan Clairmont (Mar 25)
- Re: Static Injection into Commercial Lines - DoS on Vonage - Current Status Kern (Mar 25)
- Re: Static Injection into Commercial Lines - DoSon Vonage - Current Status Philip Fagan (Mar 26)
- Re: Static Injection into Commercial Lines - DoS on Vonage - Current Status Anja Hofmann (Mar 26)
- Re: Free Tibet.. Eduardo Tongson (Mar 26)
- Re: Free Tibet.. www417 (Mar 25)
- Re: Free Tibet.. Adam Hunt (Mar 25)
- Re: Free Tibet.. Mr . Rain (Mar 26)
- Re: Free Tibet.. Adam Hunt (Mar 26)
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