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I have an interesting issue.<br><br>Just upgraded/installed CUCM 8.0(3a). All gateways are H.323. Most phones are 7940/7960.<br>This did NOT seem to be an issue with CUCM 4.0(2a) and MGCP gateways.<br><br>Issue is intermittent. <br>IP Phone caller calls a local number by dialing 9.XXXXXXX, I can see the call on the gateway. During the ringback of the IP phone they are hearing the conversation of another call already in progress. The phone shows the arrows as if it is still establishing the call, but seems to be connected to another external call. The PSTN caller CANNOT hear the IP Phone user. And the IP Phone user can only hear one person in the conversation. The call still does ring on the device which is being called. When the called party answers, they hear dead air, but the IP Phone sees that the call is established (the counter beings) but still hears that first call. The call gets dropped when the called party hangs up.<br><br>We are getting this on inbound and outbound calls.<br><br>Any ideas?<br><br>common configuration is as follows:<br><br><br>isdn switch-type primary-ni<br>!<br><br>controller T1 0/0/0<br> cablelength long 0db<br> pri-group timeslots 1-24<br><br>voice service voip<br> allow-connections h323 to h323<br> allow-connections h323 to sip<br> allow-connections sip to h323<br> allow-connections sip to sip<br> supplementary-service h450.12<br> fax protocol t38 ls-redundancy 2 hs-redundancy 1 fallback pass-through g711ulaw<br> h323<br> no h225 timeout keepalive<br> h225 display-ie ccm-compatible<br><br>voice rtp send-recv<br><br><br>voice class codec 1<br> codec preference 1 g711ulaw<br> codec preference 2 g729r8<br>!<br>voice class h323 1<br> h225 timeout tcp establish 3<br>!<br>!<br><br>interface GigabitEthernet0/0<br> ip address 10.X.X.X 255.255.255.0<br> duplex full<br> speed 100<br> h323-gateway voip interface<br> h323-gateway voip bind srcaddr 10.X.X.X<br><br>!<br><br>int Serial 0/0/0:23<br>isdn supp-service name calling<br><br><br>dial-peer voice 1 pots<br>
description ** Default Dial-Peer for Incoming POTS Calls **<br>
incoming called-number .<br>
direct-inward-dial<br>
!<br>dial-peer voice 3 pots<br> destination-pattern 9T<br> port 0/0/0:23<br>!<br>dial-peer voice 911 pots<br> trunkgroup ANALOG_PSTN<br> preference 1<br> destination-pattern 9911<br> prefix 911<br>!<br>dial-peer voice 912 pots<br> trunkgroup ANALOG_PSTN<br> preference 2<br> destination-pattern 9911<br> prefix 911<br>!<br>dial-peer voice 4 pots<br> trunkgroup ANALOG_PSTN<br> destination-pattern #4T<br>!<br>dial-peer voice 21 voip<br> preference 3<br> destination-pattern 928.......<br> session target ipv4:<br> voice-class codec 1<br> voice-class h323 1<br> dtmf-relay h245-alphanumeric<br> fax-relay ecm disable<br> fax rate disable<br> no vad<br>!<br>dial-peer voice 22 voip<br> preference 1<br> destination-pattern 928.......<br> session target ipv4:<br> voice-class codec 1<br> voice-class h323 1<br> dtmf-relay h245-alphanumeric<br> fax-relay ecm disable<br> fax rate disable<br> no vad<br>!<br>dial-peer voice 23 voip<br> preference 2<br> destination-pattern 928.......<br> session target ipv4:1<br> voice-class codec 1<br> voice-class h323 1<br> dtmf-relay h245-alphanumeric<br> fax-relay ecm disable<br> fax rate disable<br> no vad<br>!<br><br><br><br>Thanks!<br>Erin<br><br> <br> </body>
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