Uhm... it is fast... but probably would not recommend during business hours. But 110 volts is doable... long as one doesn't hit their head on something falling down.
Ehh it was never anything that jolting to me -- I was also an admin of a very large modem bank (over 60) and it seemed like somehow when I hit those it was a bit more of a "shocker" than the normal pbx handsets.. Then again it may have been the vicodin.....