<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div>Hello All,</div><div><br></div><div>I have a centralized CUCM 8.6 cluster with a Verizon centralized sip trunk service coming into a cube with 15.2.t2a. </div><div><br></div><div>I have several remote site with 2921's with VIC3-4FXSDID cards that are MGCP controlled. When these were initially rolled out we tested faxes in and out and they seemed to work just fine. Recently they have stopped working and I am unable to figure out why. I have seem some posts that maybe MGCP fax passthough will not work with verizon because they don't support nse only protocol based.… But I am confused about why it worked previously and stopped work now….</div><div><br></div><div>I can see inbound/outbound fax calls come in and setup as G711 calls, but the calls never completed. </div><div><br></div><div><br></div><div>From the cube.. </div><div><div>voice service voip</div><div> no ip address trusted authenticate</div><div> address-hiding</div><div> allow-connections sip to sip</div><div> no supplementary-service sip refer</div><div> redirect ip2ip</div><div> fax protocol pass-through g711ulaw</div><div> no fax-relay sg3-to-g3 </div><div> modem passthrough nse codec g711ulaw redundancy</div><div> sip</div><div> bind control source-interface Loopback1</div><div> bind media source-interface Loopback1</div><div> header-passing</div><div> localhost dns:XXXXXX.globalipcom.com</div><div> no update-callerid</div><div> early-offer forced</div><div> midcall-signaling passthru</div><div> g729 annexb-all</div><div> sip-profiles 2</div></div><div><br></div><div><br></div><div>From the remote MGCP router. </div><div><br></div><div><div>mgcp dtmf-relay voip codec all mode out-of-band</div><div>mgcp rtp unreachable timeout 1000 action notify</div><div>mgcp modem passthrough voip mode nse</div><div>mgcp modem passthrough voip redundancy</div><div>mgcp package-capability rtp-package</div><div>mgcp package-capability sst-package</div><div>mgcp package-capability pre-package</div><div>mgcp default-package mo-package</div><div>no mgcp package-capability res-package</div><div>no mgcp package-capability fxr-package</div><div>no mgcp timer receive-rtcp</div><div>mgcp sdp simple</div><div>mgcp fax t38 inhibit</div></div><div><br></div><div>Any ideas would be appreciated…</div><div><br></div><div>Thanks</div><div><br></div><div><br></div></body></html>