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I've got a WLC4400 with about 60 AIR-LAP1242AG-E-K9.Everything works fine but recently I had this problem:
some phones randomly are disconnected and they re-associate themself to the Call Manager.
I configured the QoS Platinum profile to 802.1p at 7, the phones runs the most recent firmware(4.0-03-02) and the controller too (220.127.116.11)
Please help me.
This is in idle primarily?
Are shared lines used?
Does this occur when roaming? or even if not associating to a new AP?
Will need to investigate why SCCP packets are not getting exhcnaged properly.
Is this in certain areas?
Could try enabling a lower data rate, which could potentially be more reliable transmission.
The 7920 uses the lowest basic rate in idle and the highest rate enabled when on call.
Don't need to set 802.1p tag to 7 any longer with that code version, but is also ok to leave it configured that way as well, since 7 is still the voice queue.
Would suggest to open a TAC case to seek assistance with this issue.