Hi Samson, Have you hard coded the isdn channel to ascending or descending. If so try to remove that and check.
Did you try isdn bchan-negotiate? Did you see any errors on the output of show controllers t1/e1, and show isdn status Thanks, Viki On Monday, October 21, 2013, Samson Kareem wrote: > Hi All, > > I am hitting an issue where outbound PSTN calls are failing after the call > initially seems to setup ok. > Then the H323 gateway sends a disconnect to the PSTN and the call drops as > per below. > > > Oct 21 16:42:59.876: ISDN Se0/3/0:15 Q931: TX -> SETUP pd = 8 callref = > 0x008C > Bearer Capability i = 0x8090A3 > Standard = CCITT > Transfer Capability = Speech > Transfer Mode = Circuit > Transfer Rate = 64 kbit/s > Channel ID i = 0xA98383 > Exclusive, Channel 3 > Display i = 'Tobias Funke' > Calling Party Number i = 0x1181, '17707022001' > Plan:ISDN, Type:International > Called Party Number i = 0x91, '97148037333' > Plan:ISDN, Type:International > Oct 21 16:42:59.908: ISDN Se0/3/0:15 Q931: RX <- CALL_PROC pd = 8 callref > = 0x808C > Channel ID i = 0xA98383 > Exclusive, Channel 3 > Oct 21 16:42:59.916: ISDN Se0/3/0:15 Q931: RX <- ALERTING pd = 8 callref > = 0x808C > Progress Ind i = 0x8188 - In-band info or appropriate now available > Oct 21 16:42:59.944: ISDN Se0/3/0:15 Q931: TX -> DISCONNECT pd = 8 > callref = 0x008C <<========== > Cause i = 0x80AF - Resource unavailable, unspecified > Oct 21 16:42:59.952: ISDN Se0/3/0:15 Q931: RX <- RELEASE pd = 8 callref = > 0x808C > Oct 21 16:42:59.956: ISDN Se0/3/0:15 Q931: TX -> RELEASE_COMP pd = 8 > callref = 0x008C > > > I first thought it was a DSP resource issue as the disconnect cause is > Cause i = 0x80AF - Resource unavailable, unspecified > but I checked the status of DSPs using #show voice dsp group all and no > problems there. > > I found an old post from OSL Nov 2011 where someone suggested a codec > mismatch with the H245 negotiation which causes > the call to drop immediately after the alerting message. > > The thing is I have a voice class codec configured and in any case, the > gateway was originally an MGCP gateway and calls were failing with the same > ISDN disconnect cause (I only changed it to a H323 g/w for troubleshooting > purposes). > > I tried using debug cch323 h245 and have pasted the output received after > the ISDN alerting message below. I believe this is when codec negotiation > takes place on the voip leg of the call between CUCM and the g/w. > > Oct 21 16:25:16.653: > //51/8043215D0100/H323/cch323_h245_channel_established_ind: Using fd=4 to > send msgs > Oct 21 16:25:16.653: > //51/8043215D0100/H323/cch323_send_event_to_h245_connection_sm: Changing to > new event H245_ESTABLISHED_EVENT > Oct 21 16:25:16.653: //51/8043215D0100/H323/cch323_h245_connection_sm: > H245_LISTEN: Received event H245_ESTABLISHED_EVENT while at H245_WAITING > state > Oct 21 16:25:16.653: //51/8043215D0100/H323/cch323_h245_set_new_state: > Changing from H245_WAITING state to H245_CONNECTED state > Oct 21 16:25:16.653: //51/8043215D0100/H323/run_h245_iwf_sm: received > IWF_EV_H245_CONNECTED while at state IWF_IDLE > Oct 21 16:25:16.653: //51/8043215D0100/H323/h245_iwf_set_new_state: > changing from IWF_IDLE state to IWF_AWAIT_CAP_MSD_RESP state > Oct 21 16:25:16.657: //51/8043215D0100/H323/cch323_run_h245_cap_out_sm: > Received H245_EVENT_CAP_REQ while at state IDLE > Oct 21 16:25:16.657: //51/8043215D0100/H323/h245_cap_out_set_new_state: > changing from IDLE state to AWAITING_RESPONSE state > Oct 21 16:25:16.657: //51/8043215D0100/H323/cch323_run_h245_ms_sm: > Received event H245_EVENT_MSD while at state H245_MS_NONE > Oct 21 16:25:16.657: //51/8043215D0100/H323/cch323_run_h245_ms_sm: Sent > MSD Request > Oct 21 16:25:16.657: //51/8043215D0100/H323/h245_ms_set_new_state: > Changing from H245_MS_NONE state to H245_MS_OUTGOING_WAIT state > > does anyone have any pointers? > > thanks > Samson > > -- Sent from IPhone
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