The CP 150/Mini is new? or recently changed.
It was working?
He can ping to CP?
if not, he can attach his laptop with hyperterminal by serial cable to serial port, On the power ON of Callpilot he can see the callpilot Ip address.
Connect laptop with crossover cable to data port and browser at callpilot IP address.
Default password is 0000.
If he see only one Greeting Table, then it is Callpilot mini (option 11)
if not, then it is callpilot 150 (Norstar) or
if he see Line Answering menu, then it is Callpilot 150.
if not, then it is Callpilot Mini.