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<TITLE>Re: [Freeswitch-users] send fax via google voice.</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>That makes it even easier in those countries... The whole point is anywhere along the line and then some on the PSTN there are multiple points in which a call can be compromised just as easy if not easier then cracking a network along the way. Any 10 year old with 5 minutes of instruction can build a pstn line tap and listen to phone calls... Its only a step up from that to tap fax line... That being said, just because its perceived by luddites to be more secure then say an email doesn’t make it so... <BR>
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On 3/6/11 11:33 AM, "Madovsky" <<a href="infos@madovsky.org">infos@madovsky.org</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>because crypto was and is not allowed in some countries also...<BR>
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----- Original Message ----- <BR>
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<B>From:</B> Ken Rice <<a href="mailto:krice@freeswitch.org">mailto:krice@freeswitch.org</a>> <BR>
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<B>To:</B> FreeSWITCH Users Help <<a href="mailto:freeswitch-users@lists.freeswitch.org">mailto:freeswitch-users@lists.freeswitch.org</a>> <BR>
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<B>Sent:</B> Sunday, March 06, 2011 12:23 PM<BR>
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<B>Subject:</B> Re: [Freeswitch-users] send fax via google voice.<BR>
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Geography doesn’t stop a determined attacker... <BR>
<BR>
Just because its a little more difficult, that doesn’t mean it is secure... If that were the case then Classified US Government Faxes wouldn’t require crypto gear in line (see STU-III for an example of this that’s over 20 years old)<BR>
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K<BR>
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On 3/6/11 11:08 AM, "Madovsky" <<a href="infos@madovsky.org">infos@madovsky.org</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>I think it's more hard for a guy to hack your US pstn line if he lives<BR>
in Australia... fax on internet can be hacked from everywhere...<BR>
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----- Original Message ----- <BR>
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<B>From:</B> Ken Rice <<a href="mailto:krice@freeswitch.org">mailto:krice@freeswitch.org</a>> <BR>
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<B>To:</B> FreeSWITCH Users Help <<a href="mailto:freeswitch-users@lists.freeswitch.org">mailto:freeswitch-users@lists.freeswitch.org</a>> <BR>
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<B>Sent:</B> Sunday, March 06, 2011 11:55 AM<BR>
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<B>Subject:</B> Re: [Freeswitch-users] send fax via google voice.<BR>
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What security reasons? Its just as easy to tap a PSTN line as it is to sniff a network connection, the only difference is you might need a little bit different hardware...<BR>
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If it were about security, fax machines would actually encrypt a fax but they don’t... <BR>
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On 3/6/11 1:55 AM, "envelopes envelopes" <<a href="sunwood360@gmail.com">sunwood360@gmail.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>that is not true.<BR>
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Real estator/law firm/accounting offices/travel agents...many of them still prefer fax for security reasons.<BR>
I am always worried about sending my driver license pdf file via e-mail.<BR>
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On Sat, Mar 5, 2011 at 11:34 PM, curriegrad2004 <<a href="curriegrad2004@gmail.com">curriegrad2004@gmail.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>That's why PDF's/XPS/tiff's have replaced fax completely. Not many<BR>
people out there still do have a fax machine :)<BR>
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On Sat, Mar 5, 2011 at 10:56 PM, Ken Rice <<a href="krice@freeswitch.org">krice@freeswitch.org</a>> wrote:<BR>
> Ok<BR>
><BR>
> will sending a fax over it work... The answer is yes it will work..<BR>
> will it work reliably, no<BR>
><BR>
> Faxing just needs to die already...<BR>
> The problem you have here with Faxing over G711 (PCMU or PCMA) is that<BR>
> faxing uses a modem to encode a digital signal into an analog carrier meant<BR>
> for a circuit switch voice network with a constant amount of delay and<BR>
> guaranteed delivery of the entire analog stream<BR>
><BR>
> VoIP by definition is Voice Over Internet Protocol... IP is a packet<BR>
> switched network, where you can no guarantee a constant amount delay<BR>
> (latency) ... Not to mention it is not common to see a udp packet or 2<BR>
> missing along the way.<BR>
><BR>
> Where as 1 20ms packet may not seem like much to you, that’s roughtly<BR>
> equivalent to 575bytes of data in the fax and it will screw up the fax<BR>
> either causing a corruption of the data, or a drop in the analog modem<BR>
> carrier which requires a retrain...<BR>
><BR>
><BR>
><BR>
><BR>
> On 3/5/11 11:35 PM, "envelopes envelopes" <<a href="sunwood360@gmail.com">sunwood360@gmail.com</a>> wrote:<BR>
><BR>
> ok,<BR>
><BR>
> Reliability is a different issue. I am just wondering whether mod_dingaling<BR>
> supports fax via GV. because someone proved sending fax via GV from fax<BR>
> machine did work<BR>
> .(<a href="http://www.magicjacksupport.com/faxing-via-google-voice-t7412.html">http://www.magicjacksupport.com/faxing-via-google-voice-t7412.html</a>).<BR>
><BR>
><BR>
><BR>
> On Sat, Mar 5, 2011 at 9:18 PM, curriegrad2004 <<a href="curriegrad2004@gmail.com">curriegrad2004@gmail.com</a>><BR>
> wrote:<BR>
><BR>
> And relativity comes into play too.<BR>
><BR>
> Also you do need to realize that the packets sent via UDP isn't<BR>
> guaranteed to be in order as the fax machine expects the data to be<BR>
> sent in order, not out of order. That's the beauty of packet switched<BR>
> networks.<BR>
><BR>
> On Sat, Mar 5, 2011 at 7:29 PM, Steve Underwood <<a href="steveu@coppice.org">steveu@coppice.org</a>> wrote:<BR>
>> On 03/06/2011 11:21 AM, envelopes envelopes wrote:<BR>
>>><BR>
>>> Why is PCMU codec not reliable?<BR>
>>><BR>
>>><BR>
>> Unsynchronised clocks, and packet loss.<BR>
>><BR>
>> Steve<BR>
>><BR>
>><BR>
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