For a 616 you will need a C6 module. It's wired across your punchdown blocks for the trunks. CID trunk cards are for the Modular ICS line. The 8x24 system uses the M8 module.
I know you can expand you 8X24 with a copper expansion carde, trunk module and ls/ds cards. That is regular lines, I am not sure if you can use ci cards on it that is why I am asking.
You can use CLID trunk cards on an 0X12. It is unclear, however, whether or not you need also to have the M8 loaded up first in order for the CLID trunk cards to work.
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