[Freeswitch-users] send fax via google voice.

Ken Rice krice at freeswitch.org
Sun Mar 6 20:23:53 MSK 2011 

Geography doesn¹t stop a determined attacker...

Just because its a little more difficult, that doesn¹t mean it is secure...
If that were the case then Classified US Government Faxes wouldn¹t require
crypto gear in line (see STU-III for an example of this that¹s 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 don¹t... 
>> 
>> 
>> 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, that¹s 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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