list config all will show all the media modules. Look for the DS1 circuit packs. list signaling-groups will show all the signaling groups. Look for ISDN-PRI. list trunk-group will show all the trunk groups. Look for isdn.
Each circuit requires a unique DS1 card and typically a matching signaling group. There may be instances where two or more circuits share a D-channel but that's not very common.
You can display trunk-group x to see what ports/cards are assigned to each trunk and find the associated signaling group. display ds1 [board] will show you some details on each DS1 board, if configured.
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