I was using the T60, writing a message, when my cordless telephone
[Panasonic - 2.4GHz] started ringing. Not unusual, but then the sound
on the TPad started a constant, high-pitched alarm-like tone. Only by
using the ThinkVantage [blue rectangle] button to mute the sound would
it stop.
I should also mention that, contrary to what some others have
experienced, the 'ThinkPad On-Screen Display' tool works for me to
raise/lower/mute the sound. This is why I instinctly pushed the 'mute'
button.
Was it a coincidence? Or was there really a cause-effect action here?