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    <blockquote
cite="mid:CAD4dZ0mvbu+yc=wsOGJLcjKE_K717tMVoG+1XQ1J6=8X6R_Rng@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div class="gmail_extra">Responding to Matt Riddell, M
          Shokuie, A J Stiles, and Telium Support (all below)</div>
        <div class="gmail_extra"><br>
        </div>
        <div class="gmail_extra">Thanks for the suggestions, but a
          separate gateway is a problem in the design as the
          configuration is basically:</div>
        <div class="gmail_extra"><br>
        </div>
        <div class="gmail_extra">Carrier --- PRI --- Asterisk (with
          failover) ---- Legacy PBX</div>
        <div class="gmail_extra">                              |</div>
        <div class="gmail_extra">                              - SIP /
          IAX2 -- our service or remote office</div>
        <div class="gmail_extra"><br>
        </div>
        <div class="gmail_extra">As this is already acting as a gateway
          adding another box to the mix seems a bit over kill (unless I
          can embed it and the asterisk PBX into a 2 U pizza box). But
          since most gateways are designed to be used for fail over
          servers / PBXs not lines I am not sure that this would benefit
          us.</div>
        <div class="gmail_extra"><br>
        </div>
        <div class="gmail_extra">So far I have found 1 company that
          seems to have a gateway card and that is the <span
            style="font-family:Geneva,Helvetica,Arial,sans-serif;font-size:12px">beroNet
            PCI / PCIe Gateway Cards which they say has the card level
            failover. I will update the list should this meet the use
            case.</span></div>
        <div class="gmail_extra"><font face="Geneva, Helvetica, Arial,
            sans-serif"><span style="font-size:12px">Eric</span></font></div>
        <div class="gmail_extra"><font face="Geneva, Helvetica, Arial,
            sans-serif"><span style="font-size:12px"><br>
            </span></font>
          <div class="gmail_quote">
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">----------------------------------------------------------------------<br>
              <br>
              Message: 1<br>
              Date: Mon, 3 Aug 2015 13:54:05 -0500<br>
              From: Matt Riddell <<a moz-do-not-send="true"
                href="mailto:lists@venturevoip.com">lists@venturevoip.com</a>><br>
              To: Asterisk Users Mailing List - Non-Commercial
              Discussion<br>
                      <<a moz-do-not-send="true"
                href="mailto:asterisk-users@lists.digium.com">asterisk-users@lists.digium.com</a>><br>
              Subject: Re: [asterisk-users] Looking for PRI Card with
              automatic fail<br>
                      over<br>
              Message-ID: <<a moz-do-not-send="true"
                href="mailto:2539D3B3-4981-468F-95AF-34D9D6A170BA@venturevoip.com">2539D3B3-4981-468F-95AF-34D9D6A170BA@venturevoip.com</a>><br>
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              <br>
              Yep it was red fone<br>
              <br>
              <a moz-do-not-send="true" href="http://red-fone.com"
                rel="noreferrer" target="_blank">http://red-fone.com</a><br>
              <br>
              7 years ago :-)<br>
              <br>
              <a moz-do-not-send="true"
                href="http://www.venturevoip.com/detail.php?news_id=1927"
                rel="noreferrer" target="_blank">http://www.venturevoip.com/detail.php?news_id=1927</a><br>
              <br>
              --<br>
              Cheers,<br>
              <br>
              Matt Riddell<br>
              _______________________________________________<br>
              <br>
              <a moz-do-not-send="true"
                href="http://www.venturevoip.com/news.php"
                rel="noreferrer" target="_blank">http://www.venturevoip.com/news.php</a>
              (Daily Asterisk News)<br>
              <a moz-do-not-send="true"
                href="http://www.venturevoip.com/pabx_on_disk.php"
                rel="noreferrer" target="_blank">http://www.venturevoip.com/pabx_on_disk.php</a>
              (PABX on a Disk)<br>
              <a moz-do-not-send="true"
                href="http://www.venturevoip.com/exchange.php"
                rel="noreferrer" target="_blank">http://www.venturevoip.com/exchange.php</a>
              (Full ITSP Solution)<br>
              <a moz-do-not-send="true"
                href="http://www.venturevoip.com/cc.php"
                rel="noreferrer" target="_blank">http://www.venturevoip.com/cc.php</a>
              (Call Centre Solutions)<br>
              <br>
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              <br>
              ------------------------------<br>
              <br>
              Message: 2<br>
              Date: Mon, 3 Aug 2015 23:31:29 +0430<br>
              From: M Shokuie <<a moz-do-not-send="true"
                href="mailto:senahrm@gmail.com">senahrm@gmail.com</a>><br>
              To: Asterisk Users Mailing List - Non-Commercial
              Discussion<br>
                      <<a moz-do-not-send="true"
                href="mailto:asterisk-users@lists.digium.com">asterisk-users@lists.digium.com</a>><br>
              Subject: Re: [asterisk-users] Looking for PRI Card with
              automatic fail<br>
                      over<br>
              Message-ID:<br>
                      <CAJC6NeY7if_T-YspbccLLf2ZiL4LOBt45ajJ=kKsgWn=<a
                moz-do-not-send="true"
                href="mailto:7nzmmw@mail.gmail.com"><a class="moz-txt-link-abbreviated" href="mailto:7nzmmw@mail.gmail.com">7nzmmw@mail.gmail.com</a></a>><br>
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              <br>
              Hi there,<br>
              <br>
              Using Sangoma Vega400 gateway you'll have what is called
              resilliency which<br>
              is exactly what you are looking for.<br>
              <br>
              Regards.<br>
              --<br>
              M. Shokuie Nia<br>
              On Aug 3, 2015 18:51, "Eric Klein" <<a
                moz-do-not-send="true"
                href="mailto:eric.klein@greenfieldtech.net"><a class="moz-txt-link-abbreviated" href="mailto:eric.klein@greenfieldtech.net">eric.klein@greenfieldtech.net</a></a>>
              wrote:<br>
              <br>
              > Hi all,<br>
              ><br>
              > Strange request, I have a customer where we are
              putting an Asterisk PBX in<br>
              > front of a legacy (non-VoIP) PBX. One of the
              requirements it that the<br>
              > Asterisk PBX have 2 PRI ports (on towards the legacy
              PBX and one towards<br>
              > the carrier) with the ability to go to pass through
              should the Asterisk PBX<br>
              > (software or hardware level) fail.<br>
              ><br>
              > I did not see this feature in the Digium, Sangoma,
              Allo, or OpenVox cards.<br>
              ><br>
              > Does anyone know of a card that will do this? I know
              that Digium has an<br>
              > external box (the r850) that does something similar
              for 2 PBXs making them<br>
              > high availability, but in this case I only have the 1
              Asterisk box acting<br>
              > as a gateway and passing some calls out over SIP and
              IAX2.<br>
              ><br>
              > Any suggestions would be appreciated.<br>
              ><br>
              > Thanks<br>
              > Eric<br>
              ><br>
              > --<br>
              >
              _____________________________________________________________________<br>
              > -- Bandwidth and Colocation Provided by <a
                moz-do-not-send="true" href="http://www.api-digital.com"
                rel="noreferrer" target="_blank"><a class="moz-txt-link-freetext" href="http://www.api-digital.com">http://www.api-digital.com</a></a>
              --<br>
              > New to Asterisk? Join us for a live introductory
              webinar every Thurs:<br>
              >                <a moz-do-not-send="true"
                href="http://www.asterisk.org/hello" rel="noreferrer"
                target="_blank">http://www.asterisk.org/hello</a><br>
              ><br>
              > asterisk-users mailing list<br>
              > To UNSUBSCRIBE or update options visit:<br>
              >    <a moz-do-not-send="true"
                href="http://lists.digium.com/mailman/listinfo/asterisk-users"
                rel="noreferrer" target="_blank">http://lists.digium.com/mailman/listinfo/asterisk-users</a><br>
              ><br>
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              <br>
              ------------------------------<br>
              <br>
              Message: 3<br>
              Date: Tue, 4 Aug 2015 08:47:02 +0100<br>
              From: A J Stiles <<a moz-do-not-send="true"
                href="mailto:asterisk_list@earthshod.co.uk">asterisk_list@earthshod.co.uk</a>><br>
              To: "Asterisk Users Mailing List - Non-Commercial
              Discussion"<br>
                      <<a moz-do-not-send="true"
                href="mailto:asterisk-users@lists.digium.com">asterisk-users@lists.digium.com</a>><br>
              Subject: Re: [asterisk-users] Looking for PRI Card with
              automatic fail<br>
                      over<br>
              Message-ID: <<a moz-do-not-send="true"
                href="mailto:201508040847.02341.asterisk_list@earthshod.co.uk">201508040847.02341.asterisk_list@earthshod.co.uk</a>><br>
              Content-Type: Text/Plain;  charset="utf-8"<br>
              <br>
              On Monday 03 Aug 2015, Eric Klein wrote:<br>
              > Hi all,<br>
              ><br>
              > Strange request, I have a customer where we are
              putting an Asterisk PBX in<br>
              > front of a legacy (non-VoIP) PBX. One of the
              requirements it that the<br>
              > Asterisk PBX have 2 PRI ports (on towards the legacy
              PBX and one towards<br>
              > the carrier) with the ability to go to pass through
              should the Asterisk PBX<br>
              > (software or hardware level) fail.<br>
              ><br>
              > I did not see this feature in the Digium, Sangoma,
              Allo, or OpenVox cards.<br>
              ><br>
              > Does anyone know of a card that will do this? I know
              that Digium has an<br>
              > external box (the r850) that does something similar
              for 2 PBXs making them<br>
              > high availability, but in this case I only have the 1
              Asterisk box acting<br>
              > as a gateway and passing some calls out over SIP and
              IAX2.<br>
              ><br>
              > Any suggestions would be appreciated.<br>
              <br>
              Use a 4-pole change-over relay to switch the PRI
              connection either to the<br>
              Asterisk box if it gets some sort of "heartbeat" signal
              from the computer<br>
              (say, toggling one of the lines of a printer port, if the
              motherboard still<br>
              has one),  or the old PABX?<br>
              <br>
              You might have to do some mean, down and dirty low-level
              programming, to embed<br>
              your heartbeat-generating code in Asterisk's idle loop;
              but the Source Code is<br>
              out there, if you fancy the challenge .....<br>
              <br>
              --<br>
              AJS<br>
              <br>
              Note:  Originating address only accepts e-mail from list! 
              If replying off-<br>
              list, change address to asterisk1list at earthshod dot co
              dot uk .<br>
              <br>
              <br>
              <br>
              ------------------------------<br>
              <br>
              Message: 4<br>
              Date: Tue, 4 Aug 2015 08:23:47 -0400<br>
              From: Technical Support <<a moz-do-not-send="true"
                href="mailto:support@telium.ca">support@telium.ca</a>><br>
              To: <a moz-do-not-send="true"
                href="mailto:asterisk-users@lists.digium.com">asterisk-users@lists.digium.com</a><br>
              Subject: Re: [asterisk-users] Looking for PRI Card with
              automatic fail<br>
                      over<br>
              Message-ID: <<a moz-do-not-send="true"
                href="mailto:55C0AED3.4030004@telium.ca">55C0AED3.4030004@telium.ca</a>><br>
              Content-Type: text/plain; charset=windows-1252;
              format=flowed<br>
              <br>
              On 8/4/2015 3:47 AM, A J Stiles wrote:<br>
              > On Monday 03 Aug 2015, Eric Klein wrote:<br>
              >> Hi all,<br>
              >><br>
              >> Strange request, I have a customer where we are
              putting an Asterisk PBX in<br>
              >> front of a legacy (non-VoIP) PBX. One of the
              requirements it that the<br>
              >> Asterisk PBX have 2 PRI ports (on towards the
              legacy PBX and one towards<br>
              >> the carrier) with the ability to go to pass
              through should the Asterisk PBX<br>
              >> (software or hardware level) fail.<br>
              >><br>
              >> I did not see this feature in the Digium,
              Sangoma, Allo, or OpenVox cards.<br>
              >><br>
              >> Does anyone know of a card that will do this? I
              know that Digium has an<br>
              >> external box (the r850) that does something
              similar for 2 PBXs making them<br>
              >> high availability, but in this case I only have
              the 1 Asterisk box acting<br>
              >> as a gateway and passing some calls out over SIP
              and IAX2.<br>
              >><br>
              >> Any suggestions would be appreciated.<br>
              > Use a 4-pole change-over relay to switch the PRI
              connection either to the<br>
              > Asterisk box if it gets some sort of "heartbeat"
              signal from the computer<br>
              > (say, toggling one of the lines of a printer port, if
              the motherboard still<br>
              > has one),  or the old PABX?<br>
              ><br>
              > You might have to do some mean, down and dirty
              low-level programming, to embed<br>
              > your heartbeat-generating code in Asterisk's idle
              loop; but the Source Code is<br>
              > out there, if you fancy the challenge .....<br>
              ><br>
              Building on the answer above, have a look at ESL labs -
              who make such a<br>
              relay that can bypass the PRI to the Asterisk server.  As
              well, have a<br>
              look at HAAst (<a moz-do-not-send="true"
                href="http://www.telium.ca" rel="noreferrer"
                target="_blank">www.telium.ca</a>) which can monitor
              Asterisk and then<br>
              control the ESL relay to bypass Asterisk in case of
              failure.<br>
              <br>
              -Raj-<br>
              <br>
              P.S. My opinions do not necessarily reflect those of my
              employer. As I<br>
              am employed by Telium you can bet that me opinions are
              biased!<br>
              <br>
              <br>
            </blockquote>
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      </div>
      <br>
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      <br>
    </blockquote>
    If you place an ESL PRI A/B switch on either side of the Asterisk
    server you can easily bypass the Asterisk server, or place it inline
    with the PRI link.<br>
    <br>
    You can also chose to TAP the lines as noted above, but you have to
    ensure that both PRI cards don't go live at once...(if I understand
    that product correctly).<br>
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