it's been a while since i've done an ad-8.....
i'm thinking you need to assign the card as a esi8 in 7-1
those new ports need to be set up as vm ports in 7-2
ext numbers need to be assigned in 4-10 for those ports
the pilot number to the vm should be set as the master in 4-14
you'll need to setup a hunt group for those ports in 4-15
certain features need to be allowed in class of service for the phones (ie live record) in 1-8-08
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then you'll need cosessions to do any programming on the vm itself