Etisalat ISDN IP Phone not disconnecting when remote end hangs up
Has anyone had experience with Etisalat ISDN E1 setup as H323?
Installed a H323 GW with CUCM 9.1 and all working fine apart from when the call is made through the ISDN the Cisco IP Phone doesn't hang the call if the other person has hung up first. Just get busy tone for 20-30 seconds before the phone "hangs up"
Debug Q931 message as follows after the remote end hangs up.
May 12 17:15:37.321: ISDN Se0/0/0:15 Q931: RX <- ALERTING pd = 8 callref = 0x8099 Progress Ind i = 0x8288 - In-band info or appropriate now available May 12 17:15:37.321: ISDN Se0/0/0:15 **ERROR**: L3_ProcessEvent: UNEXPECTED event - 0x1 state 10 May 12 17:15:37.321: ISDN Se0/0/0:15 **ERROR**: Ux_BadMsg: Invalid Message for call state 10, call id 0x801A, call ref 0x99, event 0x1 May 12 17:15:37.321: ISDN Se0/0/0:15 Q931: TX -> STATUS pd = 8 callref = 0x0099 Cause i = 0x80E201 - Message not compatible with call state or not implemented Call State i = 0x0A May 12 17:15:37.433: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8 callref = 0x8099 Cause i = 0x82E500000000 - Message not compatible with call state Progress Ind i = 0x8288 - In-band info or appropriate now available May 12 17:15:37.433: ISDN Se0/0/0:15 Q931: call_disc: PI received in disconnect; Postpone sending RELEASE for callid 0x801A May 12 17:15:37.565: ISDN Se0/0/0:15 Q931: TX -> RELEASE pd = 8 callref = 0x0099 May 12 17:15:38.017: ISDN Se0/0/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x8099
It may did the trick, but it is not the solution. With the call preserve limit-media-detection you achieve that you don't here a busy signal, but the internal phone is not hanging up the call.
This is a provider issue. When the remote party hangs up, PSTN sends ALERTING again and this is not an expected message after call connect. As ALERTING is not expected message for a CONNECTED call is why the Cisco Router throw that error.
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