I will try that tonight. I have some extensions at work that have 511 in it's number. I doubt it will be a problem because the pbx (sip server) has certain timers. I.e. When I dial manually the 1-888 number that my 511 points to, it immediately pretty much starts to ring on the other end. However, when I dial 511, there is a good 2-3 second pause before it starts ringing. I believe the server is waiting to see if there are more numbers. If there are, then obviously the 511 isn't the shortcut number. I'll experiment with it. Later... Mike....