I have a few Cisco 7821 handsets that will not allow DTMF tones to pass to things like on-line banking. i.e "press 1 for x, press 2 for y", when i press "1" i hear the tone but the other end does nothing.
It works with most other phone types as we have the option to disable rfc2833 but this function is not available in the menu for 7821's
Hope you can help and thanks in advance.
Hello Martin, This could be a bug as I have experienced something simillar with other phones. A good way to test is entering your PIN against your unity connectio voicemail server. If it does not work then open a TAC case.