Thanks - looks like the Fluke IntelliTone Pro or something like it, is the way to go. Yea I was hoping I'd have some help with this, one watching the switches while the other plugs/unplugs a laptop at the jacks but that wasn't an option. I was about to use the 'Single Person' method.
The network and PBX 'closet' is just a narrow space behind a wall with no lighting. There's about a foot of flooring from the wall, after that it drop down about a foot. When making phone moves I stand on the floor and lean back against a metal stud, with a flashlight. I check out the Fluke IntelliTone Pro some more.
If I had networking knowledge and access to the customer's switch - after obtaining an IP address via DHCP I'd run a command (assuming there is one) to see which port that particular IP address is on.
