Actually, I can get into programming on the phone, it's just that the keys for navigating around are not apparent and I don't have a reference card or anything in the manual that references an 18-button phone. The instructions for a 24-button phone in the manual I have don't work for the 18-button.

I'll be on site again tomorrow and I'll obtain answers to all the questions above. The phones themselves display 2.1 when powered up, but I have in my head that the EPROM's say 2.6.