11-27-2015 03:34 AM - edited 03-17-2019 05:02 AM
Incoming call coming via PSTN through a 10 channel fractional E1 reached the destination number through an MGCP gateway and gets dead air. When redialled, the call goes through.
Calling Number: 427341490
Called Number : 77076
Attached is the CUCM traces
11-27-2015 04:35 AM
Did the first call made ring the phone? Was the call answered and then dead air experienced?
If the call connected, that would mean the signaling was fine and the RTP needs to be investigated.
11-27-2015 04:37 AM
Hi,
I had a quick look into the trace, after the phone goes off hook we see an important message
11/26/2015 15:33:44.927 CCM|StationInit: (0004482) OffHook.|<CLID::DWNR-CUCM><NID::nryd-cm01><CT::2,100,39,1.580767285><IP::10.205.50.147><DEV::SEP00070E57571A><LVL::State Transition><MASK::0020>
11/26/2015 15:33:44.930 CCM|MGCPpn9d:star_MGCPModifyConnection - No change in connectionMode and localConnectOpt since last MGCP message sent from CM to gateway. Save this MDCX.|<CLID::DWNR-CUCM><NID::nryd-cm01><CT::2,100,132,412964.1><IP::><DEV::><LVL::Significant><MASK::2000>
Basically we do not see any MDCX for this call. There was a bug filed for this exact message but it involved an incoming call that was redirected to the final destination, not a direct call to the called party
https://tools.cisco.com/bugsearch/bug/CSCud26944/?reffering_site=dumpcr
If you can try changing the service parameter mentioned in the bug in service parameters advanced option it will help rule out the above bug.
Manish
- Do rate helpful posts -
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: