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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