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@madovsky.org> wrote:

because crypto was and is not allowed in some countries also...

----- Original Message -----
 
From:  Ken Rice <mailto:krice@freeswitch.org>   
 
To: FreeSWITCH Users Help <mailto:freeswitch-users@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@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@freeswitch.org>    
 
To: FreeSWITCH Users Help <mailto:freeswitch-users@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@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@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@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@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@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@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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