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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Definitely a valid point on ECM - it can help with a few errors detected on transmitted page, but consistent errors will simply cause ECM to retransmit again, and again, until
the fax fails, redials, detects more errors and repeats the retransmissions, fax failure, redial, repeat again, etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Adding to this, you can disable ECM from a Cisco voice gateway when using fax relay. When using pass-through, this can’t be done in IOS and must be done on the fax machine
itself, but fax relay has the capability to the ECM “advertisement” from the destination fax machine’s DIS, which is basically a series of tones communicating its capabilities (ECM being one of them). If this gets stripped from the DIS, the originating fax
machine will simply think ECM isn’t supported and will never negotiate it when sending its DCS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">This done on the terminating gateway:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">For SIP/H.323<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> voice service voip<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> fax-relay ecm disable<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">For MGCP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> no mgcp fax t38 ecm<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Hope this helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">- Dan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Ryan Huff [mailto:ryanhuff@outlook.com]
<br>
<b>Sent:</b> Wednesday, August 19, 2015 10:53 AM<br>
<b>To:</b> nhaas@co.fresno.ca.us; Daniel Pagan <dpagan@fidelus.com>; norm.nicholson@kitchener.ca; cisco-voip@puck.nether.net<br>
<b>Subject:</b> Re: [cisco-voip] SIP analog gateways<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p>My experince is that analog faxing over SIP is sometimes a dance.<o:p></o:p></p>
<p>What I have found to work consistently is to disable SuperG3 and ECM on the fax modem and restrict the rx/tx of the modem to 14.4 Kbps.<o:p></o:p></p>
<p>Thanks,<o:p></o:p></p>
<p>Ryan<o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
-------- Original Message --------<br>
From: "Haas, Neal" <<a href="mailto:nhaas@co.fresno.ca.us">nhaas@co.fresno.ca.us</a>><br>
Sent: Wednesday, August 19, 2015 10:31 AM<br>
To: 'Daniel Pagan' <<a href="mailto:dpagan@fidelus.com">dpagan@fidelus.com</a>>,"'norm.nicholson@kitchener.ca'" <<a href="mailto:norm.nicholson@kitchener.ca">norm.nicholson@kitchener.ca</a>>,"'cisco-voip@puck.nether.net'" <<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>><br>
Subject: Re: [cisco-voip] SIP analog gateways<o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">We tried to put our faxes all on SIP, best solution was to move 200 DID’s back to PRI, sad day…….</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Thank you,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D">Neal Haas</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<b>From:</b> cisco-voip [<a href="mailto:cisco-voip-bounces@puck.nether.net">mailto:cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b>Daniel Pagan<br>
<b>Sent:</b> Wednesday, August 19, 2015 5:52 AM<br>
<b>To:</b> <a href="mailto:norm.nicholson@kitchener.ca">norm.nicholson@kitchener.ca</a>;
<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b> Re: [cisco-voip] SIP analog gateways<o:p></o:p></p>
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</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="color:#404040">I personally can’t speak to 3<sup>rd</sup> party FXS gateways, but I’ve worked with customers in the past whose VG224s were integrated w/ CUCM via SIP trunk. The two caveats that immediately come to mind are applicable to a non-Cisco
FXS gateway using SIP as well:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="color:#404040"> </span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in"><span style="color:#404040">1)</span><span style="font-size:7.0pt;color:#404040">
</span><span style="color:#404040">Lack of SCCP supplementary services</span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in"><span style="color:#404040"><a href="http://www.cisco.com/c/en/us/td/docs/ios/voice/fxs/configuration/guide/15_1/fxs_15_1_cg_book/fxssccpsplmft.html">http://www.cisco.com/c/en/us/td/docs/ios/voice/fxs/configuration/guide/15_1/fxs_15_1_cg_book/fxssccpsplmft.html</a></span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in"><span style="color:#404040">2)</span><span style="font-size:7.0pt;color:#404040">
</span><span style="color:#404040">Unable to use shared line appearances between the VG2XX and non-VG2XX device.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="color:#404040"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="color:#404040">Just two things to keep in mind. I’ve seen this sometimes act as a deal breaker w/ SIP to the FXS gateway. Hope this helps in some way.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="color:#404040"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="color:#404040">- Dan</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="color:#404040"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<b>From:</b> cisco-voip [<a href="mailto:cisco-voip-bounces@puck.nether.net">mailto:cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b><a href="mailto:norm.nicholson@kitchener.ca">norm.nicholson@kitchener.ca</a><br>
<b>Sent:</b> Tuesday, August 18, 2015 7:10 PM<br>
<b>To:</b> <a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b> [cisco-voip] SIP analog gateways<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
Anyone using a SIP FXS gateway instead of a VG224. Just trying to compare costs and ease of use.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
Thanks<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<b><span style="color:#00B050">Norm Nicholson</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<b><span style="color:#00B050">Telecom Analyst</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<b><span style="color:#00B050">City of Kitchener</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<b><span style="color:#00B050">(519) 741-2200 x 7000</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<o:p></o:p></p>
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