<div>Hey Guys,</div>
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<div>Thanks for the responses. The carrier still hasnt gotten back to me yet with any results. </div>
<div>The carrier is using a Broadsoft platform so I will mention this to them and have them take a look at it.</div>
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<div>Thanks, </div>
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<div>Joel P<br><br></div>
<div class="gmail_quote">On Sun, Jan 24, 2010 at 12:10 PM, Mark Holloway <span dir="ltr"><<a href="mailto:mh@markholloway.com">mh@markholloway.com</a>></span> wrote:<br>
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<div style="WORD-WRAP: break-word">The issue with 'call drops on forwarded calls' is usually a result of the PBX treating the forwarded portion of the call as a totally separate call leg from the originating call into the PBX and the PBX is not providing a progress indicator to the telco switch for the original call leg until the second call leg is answered. The telco switch will timeout if it doesn't receive a progress message and drop the call because there has been no acknowledgement to the original call setup. The reason it may not happen 100% of the time is if the forwarded call to the PSTN is setup or answered fast enough, the PBX will notify the original call leg know the call has been answered or there is ring back. Depending on the far end carrier your are forwarding calls to, it may work in some instances but not others. Proper PBX behavior is when calls are forwarded from the PBX to the PSTN, the PBX should provide SIP Diversion or ISDN Progress Indicator on the original call leg so the telco switch does not timeout. Carriers who are using Sonus, Broadsoft, Metaswitch, often make static changes in their switch to work around this problem, but the PBX is still doing it wrong.
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<div>On Jan 23, 2010, at 3:20 PM, James Buchanan wrote:</div><br>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"><span style="FONT-FAMILY: Calibri, sans-serif; COLOR: rgb(31,73,125); FONT-SIZE: 11pt">I had the same issue once. The SIP provider’s provider was killing the call at thirty seconds.</span></div>
<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"><span style="FONT-FAMILY: Calibri, sans-serif; COLOR: rgb(31,73,125); FONT-SIZE: 11pt"> </span></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"><b><span style="FONT-FAMILY: Tahoma, sans-serif; FONT-SIZE: 10pt">From:</span></b><span style="FONT-FAMILY: Tahoma, sans-serif; FONT-SIZE: 10pt"><span> </span><a style="COLOR: blue; TEXT-DECORATION: underline" href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a><span> </span>[mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>]<span> </span><b>On Behalf Of<span> </span></b>Jim Skelton<br>
<b>Sent:</b><span> </span>Friday, January 22, 2010 2:46 PM<br><b>To:</b><span> </span>Joel Perez<br><b>Cc:</b><span> </span><a style="COLOR: blue; TEXT-DECORATION: underline" href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b><span> </span>Re: [cisco-voip] Forwarded Calls drop after 29 secs</span></div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Hi Joel, I had a similar issue. I would see our calls drop after exactly 30 seconds. It turned out to be an issue with our carrier TimeWarner telecom and thier Oakland SIP switch. We repointed to thier North Carolina SIP switch and everything cleared up. TW is running Sonus switches.</div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"> Our setup with twtelecom is Carrier---sip---CUBE----h323---CUCM</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"> </div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Hope this helps.</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Jim Skelton</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Halliburton</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">On Fri, Jan 22, 2010 at 1:13 PM, Joel Perez <<a style="COLOR: blue; TEXT-DECORATION: underline" href="mailto:tman701@gmail.com" target="_blank">tman701@gmail.com</a>> wrote:</div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Hey Guys,</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"> </div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">I have a customer that is experiencing a weird issue.</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Currently some of their forwarded calls are failing after 29 secs. I believe it is only happening when the calls are forwarded to 2 specific carriers, but cant confirm that yet.</div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">I have a ticket open with the carrier so that they can take a look at the traces we have captured.</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">The issue happens the following way. Inbound call to main company DID goes to an AA, if no choice is used by the caller then it goes to a live person. However afterhours this live person forwards their call to an offsite #. When that offsite # receives the forwarded call they are only able to stay on for 29 secs then the call dies on both ends.</div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"> </div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">THe set up is as follows:</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Carrier---sip---CUBE----sip---CUCM---sccp---IPT</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">CUCM is 7.0</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Unity is 7.0</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">CUBE is 12.4.(20T4)</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt"> </div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">I have tried capturing debugs on the CUBE but havent been able to see any SIP (BYE) messages from either side.</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">This only happens when Unity is involved. Normal CFW doesnt have this problem.</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Thanks,</div></div>
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<div style="MARGIN: 0in 0in 0pt; FONT-FAMILY: 'Times New Roman', serif; FONT-SIZE: 12pt">Joel P</div></div>
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