[Freeswitch-users] send fax via google voice.

Sun Mar 6 20:33:15 MSK 2011

Re: [Freeswitch-users] send fax via google voice.because crypto was and is not allowed in some countries also...
  ----- Original Message ----- 
  From: Ken Rice 
  To: FreeSWITCH Users Help 
  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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