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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>In general with VZ Buisness SIP Trunk is a MTP resource
required for every call? So planning for 80 calls means you should have 80 MTP
resources avail? We noticed without MTP resources we can’t transfer calls.
Using CallManager 7.0(2) and UCCX 7.0(1)SR1.<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a
href="http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00808b6ca6.shtml">http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a00808b6ca6.shtml</a><o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> cmstaffin@gmail.com
[mailto:cmstaffin@gmail.com] <b>On Behalf Of </b>Craig Staffin<br>
<b>Sent:</b> Tuesday, May 26, 2009 5:34 PM<br>
<b>To:</b> Jason Aarons (US)<br>
<b>Cc:</b> cisco-voip@puck.nether.net<br>
<b>Subject:</b> Re: [cisco-voip] VG224 with Fax Machine going out Verzon
Business SIP trunk via CUBE<o:p></o:p></span></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'>Jason,<br>
<br>
So far in my experience with VZ business SIP has not been the best with faxing.<br>
They do allow fax pass-through however sometimes the CUBE router has problems
switching from a G729 codec to G711 mid stream. However I can honestly
say that I have never gotten faxes to work reliably over the verizon network.<br>
<br>
The default for Verizon SIP is G729 and once fax tones are detected it will
send a new INVITE message asking for G711 ONLY be aware of this as I ran into
problems where the dial peer was only coded for G729 and this would lead to
call silence on the call.<br>
<br>
Some debug SIP messages would be useful to see if the call was detected as a
fax call by the Nortel softswitches that verizon uses. If it was you
should see a INVITE messages a few seconds into the call.<br>
<br>
Post back once you have some debugs as I have gotten far to familar with troubleshooting
verizon SIP issues :)<br>
<br>
Craig<br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal>On Tue, May 26, 2009 at 2:52 PM, Jason Aarons (US) <<a
href="mailto:jason.aarons@us.didata.com">jason.aarons@us.didata.com</a>>
wrote:<o:p></o:p></p>
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<div>
<p>Customer has a fax machine on VG224/SCCP/Modem Passthrugh out CUBE
12.4/CallManager 7.0(2) running into Verizon Business SIP trunk. The fax
machines are having some issues (I can use analog phone to call out fine)
and I’m checking on modem passthrough with Verizon, but wonder if any
else is using Verizon Business for SIP trunk and what your faxing milage was?
Did they support G711 and modem-passthough, etc? Also checking QoS, etc.<o:p></o:p></p>
<p> <o:p></o:p></p>
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