If you have a spare card slot. I would add it there before removing the COI card. When you add a card into a vacant slot the system automatically assigns it. In this case a trunk number. From there you have a bit of programming to do. I suggest you download a copy of the IS and programming manuals at
In the programming manual there is a guide to feature programming section which outlines the required and optional memory blocks needed to set up DID's.
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