<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">What leads you to believe the router is initiating the disconnect and not the provider? On a q931 debug if you see an inbound disconnect then it is the provider dropping the call. If the router is sending it outbound then the voip leg (to the phone) has disconnected the call in which case I'd look at a potential hookswitch issue.<div><br></div><div>If it is an inbound disconnect the best thing to do is call back the person that just dropped and ask them what happened. </div><div><br><div> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">-Ryan</font></p> </div><br><div><div>On Sep 16, 2008, at 3:46 AM, Kelemen Zoltan wrote:</div><br class="Apple-interchange-newline"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">We have a client with CCME 4.3, 7940 and 7911 phones, and ISDN PRI complaining about some calls being dropped prematurely (they claim only calls to a certain, third party provider, not the one giving them the ISDN line).</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">However, debugging isdn q931 shows only Cause code 0x8090, "normal call clearing" for all the calls they've mentioned as prematurely disconnected.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">While I tend to believe it's a problem on their provider's side, it still disturbing, that the router is the one initiating the disconnect, not the provider. The calls can last anywhere from 0 to 20 seconds, but always disconnect normally.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Any idea, what to debug now, to find out more?</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">thanks,</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><span class="Apple-converted-space"> </span>Zoltan</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">cisco-voip mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</a></div> </div><br></div></body></html>