We're having issues where an incoming call is answered by picking up the hand set and the speaker phone is randomly coming on. If the user tries to press the speaker button it disconnects the call. This is intermittent and not replicable on demand.
But once the call goes to speaker, don't press the speaker button, otherwise the call will disconnect.
After it goes to speaker and you want the call to go back to the handset, press the hook key where the handset is normally parked (don't press the speaker button), the call will then route to the handset.
Have you tried the latest firmware on the phones to see if you see the same behavior? If not, I would suggest you trying the latest firmware on the Web (7.5.1a) on the phone and see if that helps. If still no luck, please contact SBSC to open a case for us to further investigate this issue.
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