39 cent stamp, here's a tip for you and anybody else that uses a numbering system for their cables. You will find this system in use on commercial plans and it's the system used by the AIA.

Each room gets a number, followed by a decimal point. The very first digit represents a floor level (000 being the basement, 100 being the first floor). Each number after the decimal point represents an item in that room.

For example, a first-floor dining room would be 108. The lighting keypad at one entry to the dining room would be 108.1 and the lighting keypad at the other side of the room would be 108.2. This way, if the client adds another keypad in the dining room, you haven't run out of numbers for the dining room.

You could add a letter symbol to this system to tell the difference between what a particular cat5e does, for example. Perhaps LKP.108.1, LKP.108.2, TP.108.1, SPK.108.1, SPK.108.2, TSTAT.108.1

Keep the leading three digit number the same for every job you do and it won't belong before you recognize a first-floor dining room when you see the number 108. (Since the AIA standard is for large commercial buildings, the numbering system they use starts with the room in the southwest corner and moves clock-wise. If the building has just one central corridor, the numbers ascend with the even numbers on one side of the corridor and the odd numbers on the other side).