Units upgraded with an elecetronic serial number don't have the serial number label!
Or you can check if there is a electronic serial number by software! Simply enter the command sys
sern and press the Enter key. If the PTC has a electronic serial number it responds with the serial
Every PTC-IIusb, PTC-IIpro and PTC-IIex should have a serial number label and should respond to the sys
sern command with the serial number!
The easiest way for licensing the professional firmware features for a PTC with an electronic serial
number is to read out the serial number with the sys sern command and copy-and-paste it into the
serial number field of the order form.
Note: the serial number is always 16 characters long!