So is the display not working or are you trying to set up caller ID?
M7208 phones were delivered with the very first Nortel systems and if you have one of those, you're not getting CID. The CICS cabinet or higher requries a CID trunk card and IIRC 5.0 or higher software. If all of those are in place, as a minimum you can press FEATURE 811 to display CID info.
Answers & Comments
So is the display not working or are you trying to set up caller ID?
M7208 phones were delivered with the very first Nortel systems and if you have one of those, you're not getting CID. The CICS cabinet or higher requries a CID trunk card and IIRC 5.0 or higher software. If all of those are in place, as a minimum you can press FEATURE 811 to display CID info.
Carl