To the best of my knowledge you need PRI or Loop Start lines. I just copied and pasted from the Merlin Eletronic Feature Reference Guide below:
"The interface to Caller ID is provided by the 800 GS/LS-ID, 408 GS/LS-ID-MLX, or 412 LS-ID-TDL line/trunk module. These modules support Caller ID only on loop-start lines."
Unless I'm out in left field you probably won't get getting it with ground start lines as broken off part of a T1 circuit.
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