[Freeswitch-users] send fax via google voice.

Michal Bielicki michal.bielicki at seventhsignal.de
Mon Mar 7 12:37:41 MSK 2011 

I do not think it makes any difference if it is secure or not. In a court in Germany, a fax is a document, an email is not, at least not yet. So contracts need to be faxed, not emailed.
We can discuss the security of fax as much as we want, as long as the regulations make fax a requirement, it will stay around.

Am 06.03.2011 um 18:44 schrieb Ken Rice:

> 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... 
> 
> 
> 
> 
> On 3/6/11 11:33 AM, "Madovsky" <infos at madovsky.org> wrote:
> 
>> because crypto was and is not allowed in some countries also...
>>> 
>>> ----- Original Message ----- 
>>>  
>>> From:  Ken Rice <mailto:krice at freeswitch.org>   
>>>  
>>> To: FreeSWITCH Users Help <mailto:freeswitch-users at lists.freeswitch.org>   
>>>  
>>> Sent: Sunday, March 06, 2011 12:23  PM
>>>  
>>> Subject: Re: [Freeswitch-users] send fax  via google voice.
>>>  
>>> 
>>> Geography doesn’t stop a determined attacker...  
>>> 
>>> 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)
>>> 
>>> K
>>> 
>>> 
>>> On 3/6/11 11:08 AM, "Madovsky" <infos at madovsky.org>  wrote:
>>> 
>>>  
>>>> I think it's more hard for a guy to hack your US  pstn line if he lives
>>>> in Australia... fax on internet can be hacked from  everywhere...
>>>>  
>>>>> 
>>>>> ----- Original Message -----  
>>>>>  
>>>>> From:  Ken Rice <mailto:krice at freeswitch.org>    
>>>>>  
>>>>> To: FreeSWITCH Users Help <mailto:freeswitch-users at lists.freeswitch.org>    
>>>>>  
>>>>> Sent: Sunday, March 06, 2011 11:55   AM
>>>>>  
>>>>> Subject: Re: [Freeswitch-users] send fax   via google voice.
>>>>>  
>>>>> 
>>>>> 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...
>>>>> 
>>>>> If it were about security, fax  machines would  actually encrypt a fax but they don’t... 
>>>>> 
>>>>> 
>>>>> On 3/6/11  1:55  AM, "envelopes envelopes" <sunwood360 at gmail.com>   wrote:
>>>>> 
>>>>>  
>>>>>  
>>>>>> that is not true.
>>>>>> 
>>>>>> Real estator/law   firm/accounting offices/travel agents...many of them still prefer  fax for  security reasons.
>>>>>> I am always worried about sending my  driver license pdf  file via e-mail.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> On Sat, Mar 5,  2011 at 11:34 PM,  curriegrad2004 <curriegrad2004 at gmail.com>   wrote:
>>>>>>  
>>>>>>  
>>>>>>> That's why PDF's/XPS/tiff's have replaced fax   completely. Not many
>>>>>>> people out there still do have a fax  machine  :)
>>>>>>> 
>>>>>>> On Sat, Mar 5, 2011 at 10:56 PM, Ken Rice  <krice at freeswitch.org>  wrote:
>>>>>>> >  Ok
>>>>>>> >
>>>>>>> > will sending a fax over it  work... The answer is yes it  will work..
>>>>>>> > will it work  reliably, no
>>>>>>> >
>>>>>>> > Faxing just  needs to die  already...
>>>>>>> > The problem you have here with Faxing over   G711 (PCMU or PCMA) is that
>>>>>>> > faxing uses a modem to  encode a  digital signal into an analog carrier meant
>>>>>>> > for  a circuit switch  voice network with a constant amount of delay  and
>>>>>>> > guaranteed  delivery of the entire analog  stream
>>>>>>> >
>>>>>>> > VoIP by definition is  Voice Over Internet  Protocol... IP is a packet
>>>>>>> > switched network,  where you  can no guarantee a constant amount delay
>>>>>>> > (latency) ...   Not to mention it is not common to see a udp packet or 2
>>>>>>> >  missing  along the way.
>>>>>>> >
>>>>>>> > Where as 1 20ms packet  may not seem like  much to you, that’s roughtly
>>>>>>> >  equivalent to 575bytes of data in the  fax and it will screw up  the fax
>>>>>>> > either causing a corruption of  the data, or a  drop in the analog modem
>>>>>>> > carrier which requires a   retrain...
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> > On 3/5/11  11:35 PM,  "envelopes envelopes" <sunwood360 at gmail.com>   wrote:
>>>>>>> >
>>>>>>> > ok,
>>>>>>> >
>>>>>>> > Reliability is a  different  issue. I am just wondering whether  mod_dingaling
>>>>>>> > supports fax via  GV. because someone  proved sending fax via GV from fax
>>>>>>> > machine did   work
>>>>>>> > .(http://www.magicjacksupport.com/faxing-via-google-voice-t7412.html).
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> >   On Sat, Mar 5, 2011 at 9:18 PM, curriegrad2004 <curriegrad2004 at gmail.com>
>>>>>>> >   wrote:
>>>>>>> >
>>>>>>> > And relativity comes into play  too.
>>>>>>> >
>>>>>>> >  Also you do need to realize that the  packets sent via UDP isn't
>>>>>>> >  guaranteed to be in order as  the fax machine expects the data to  be
>>>>>>> > sent in order,  not out of order. That's the beauty of packet  switched
>>>>>>> >  networks.
>>>>>>> >
>>>>>>> > On Sat, Mar 5, 2011 at 7:29 PM,  Steve  Underwood <steveu at coppice.org>  wrote:
>>>>>>> >> On  03/06/2011 11:21 AM, envelopes envelopes   wrote:
>>>>>>> >>>
>>>>>>> >>> Why is PCMU codec not   reliable?
>>>>>>> >>>
>>>>>>> >>>
>>>>>>> >>  Unsynchronised  clocks, and packet loss.
>>>>>>> >>
>>>>>>> >>   Steve
>>>>>>> >>
>>>>>>> >>
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>>>>>>> >>
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>>>>>> 
>>>>>> 
>>>>>>  
>>>>>>  
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>>>>> 
>>>>> 
>>>>>  
>>>>>  
>>>>> 
>>>>> 
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>>>>> 
>>>>>  
>>>>> 
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>>> 
>>>  
>>> 
>>> 
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Michal Bielicki
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