these phones randomly appear to stop working, i mean: SIP signaling seems to work correctly (the phones ring if called and it is possibile to make calls..) but there's no audio either way.... it also happens that if in call, call flow stops flowing and then disconnects.
the only way to make them work again is by unplugging the network cable to unpower them (i tried the restart and reset commands from cli: the phones go through all the registration process but they still don't establish audio)
reading through the forum, it seems i'm hitting these known bugs:
but i'm already running the latest phone load: CP3905.9-4-1-0 (this is what i can see from the phones web interface.. from the cme cli the show register pool command prints Current Phone load version is Cisco-CP3905/9.2.1 for every phone..)
i'm not really sure of this, so i can only interpret the situation from the overall behaviour of the phones: this way it seems that the web interface is somehow not correct, while it is the command line output (so the short answer is, no, you shall not trust the phone web interface)
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