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Conference Issue in CUCM 11.5 or 7821

Waleed Khan
Hi, User-A calls to user-B, when user-A press conference and dial no. of user-C, ( user-A and user-C remains connected, while user-B goes on hold ), and if we press swap, user-A connected to user-B, while user-C goes on hold. MRGL and MRG is configured as well. -Waleed
4 Replies 4

Rob Huffman
Hall of Fame Community Legend Hall of Fame Community Legend
Hall of Fame Community Legend

Hi Waleed,

It sounds like you may be hitting this bug;

1.IP Phone A making call to IP Phone B
2.Answering call in IP Phone B
3.IP Phone B Making conference to IP Phone C
4.IP Phone B display cant able to connect a conference, In this case IP Phone B and C is not connected, that time IP Phone A and B call also disconnected.

Actual Behavior:
IP Phone A and IP Phone B call is disconnected.

Expected Behavior:
IP Phone A and IP Phone B must in connected state.

Environment Matrix:

CUCM Version:
Phone Load : sip78xx.11-5-1-18
Locale : cm-locale-ja_JP-

Last Modified:
Jul 27,2016
3 Moderate
Cisco IP Phone 7800 Series
Support Cases:
Known Affected Releases:

Thank Huffman, I have check in my lab, no issue at all by connecting CUCM with my lab switch, separating from client network, seems like client have some network issue, anything to check with network team I mean what to tweak around for this issue in network.


FYI: the issue coming only in SIP phones, all conference initiating from SCCP phones works great. I mean if a conference is initiated from SCCP its work well, and If conference initiated from SIP phones, it won't. Also, if conference initiated from SCCP phones including conference list having SIP phones DN, it works well because its initiated from SCCP.


Meet me conference working well on all these SIP phones.


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